https://www.auul.pri.ee/wiki/index.php?action=history&feed=atom&title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg 2026-08-05T12:56:03Z Selle lehekülje redigeerimiste ajalugu MediaWiki 1.39.13 https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4535&oldid=prev 2026-07-10T20:30:40Z

<p><span dir="auto"><span class="autocomment">CLOCK_REALTIME</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 10. juuli 2026, kell 23:30</td> </tr><tr> <td colspan="2" class="diff-lineno">158. rida:</td> <td colspan="2" class="diff-lineno">158. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_REALTIME====</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_REALTIME====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Python abil toimub CLOCK_REALTIME väärtuse küsimine nt selliselt</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4534:rev-4535:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4534&oldid=prev 2026-07-10T20:30:24Z

<p><span dir="auto"><span class="autocomment">CLOCK_MONOTONIC</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 10. juuli 2026, kell 23:30</td> </tr><tr> <td colspan="2" class="diff-lineno">119. rida:</td> <td colspan="2" class="diff-lineno">119. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_MONOTONIC====</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_MONOTONIC====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Python abil toimub CLOCK_MONOTONIC väärtuse küsimine nt selliselt</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4517:rev-4534:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4517&oldid=prev 2026-07-09T17:02:34Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 20:02</td> </tr><tr> <td colspan="2" class="diff-lineno">4. rida:</td> <td colspan="2" class="diff-lineno">4. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* mingi tegevus käivitatakse ettenäidatud ajal tulevikus (nö kalendriaja mõttes nt 8 juuni 2026 kell 13:54:55.002 UTC)</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* mingi tegevus käivitatakse ettenäidatud ajal tulevikus (nö kalendriaja mõttes nt 8 juuni 2026 kell 13:54:55.002 UTC)</div></td> </tr> <tr> <td class="diff-marker">−</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* mingid tegevused käivitatakse ettenäidatud intervalliga (nt iga minuti järel kusjuures minut on pikk 60 sekundit ja<del style="font-weight: bold; text-decoration: none;"> *</del> millisekundi täpsusega) - sekund on kusjuures see rahvusvaheliselt kokkulepitud sekund oma vältusega nagu ta on, tseesiumi isotoop jne (ehk SI mõõtühikute süsteemi sekund)</div></td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* mingid tegevused käivitatakse ettenäidatud intervalliga (nt iga minuti järel kusjuures minut on pikk 60 sekundit ja millisekundi täpsusega) - sekund on kusjuures see rahvusvaheliselt kokkulepitud sekund oma vältusega nagu ta on, tseesiumi isotoop jne (ehk SI mõõtühikute süsteemi sekund)</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* arvutis toimuvale ajaarvestusega seoses on olemas veahinnang (nt 1 ms, nt kui öeldakse et '8 juuni 2026 kell 13:54:55.002 UTC' siis kindlasti oli see vahemikus kell 13:54:55.001 kui 13:54:55.003)</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* arvutis toimuvale ajaarvestusega seoses on olemas veahinnang (nt 1 ms, nt kui öeldakse et '8 juuni 2026 kell 13:54:55.002 UTC' siis kindlasti oli see vahemikus kell 13:54:55.001 kui 13:54:55.003)</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* logikirjetes on õige aeg</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* logikirjetes on õige aeg</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4515:rev-4517:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4515&oldid=prev 2026-07-09T17:00:16Z

<p><span dir="auto"><span class="autocomment">TSC</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 20:00</td> </tr><tr> <td colspan="2" class="diff-lineno">195. rida:</td> <td colspan="2" class="diff-lineno">195. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Osutub, et nö oneliner abil seda ei ole hästi võimalik teha.</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Osutub, et nö oneliner abil seda ei ole hästi võimalik teha.</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>===Kasulikud lisamaterjalid===</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* TODO</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4514:rev-4515:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4514&oldid=prev 2026-07-09T16:59:54Z

<p><span dir="auto"><span class="autocomment">CLOCK_MONOTONIC</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:59</td> </tr><tr> <td colspan="2" class="diff-lineno">139. rida:</td> <td colspan="2" class="diff-lineno">139. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">−</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>root@<del style="font-weight: bold; text-decoration: none;">rv-nspri</del>-01:~# ./clock_monotonic.py</div></td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@<ins style="font-weight: bold; text-decoration: none;">arvuti</ins>-01:~# ./clock_monotonic.py</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (seconds): 594952.69380332</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (seconds): 594952.69380332</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (nanoseconds): 594952693885526</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (nanoseconds): 594952693885526</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">−</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>root@<del style="font-weight: bold; text-decoration: none;">rv-nspri</del>-01:~# echo 594952/86400 | bc</div></td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@<ins style="font-weight: bold; text-decoration: none;">arvuti</ins>-01:~# echo 594952/86400 | bc</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>6</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>6</div></td> </tr> <tr> <td class="diff-marker">−</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>root@<del style="font-weight: bold; text-decoration: none;">rv-nspri</del>-01:~# uptime</div></td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@<ins style="font-weight: bold; text-decoration: none;">arvuti</ins>-01:~# uptime</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 10:49:15 up 6 days, 21:16, 2 users, load average: 0.09, 0.06, 0.01</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 10:49:15 up 6 days, 21:16, 2 users, load average: 0.09, 0.06, 0.01</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4513:rev-4514:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4513&oldid=prev 2026-07-09T16:58:21Z

<p><span dir="auto"><span class="autocomment">CLOCK_REALTIME</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:58</td> </tr><tr> <td colspan="2" class="diff-lineno">190. rida:</td> <td colspan="2" class="diff-lineno">190. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* kasutatakse logikirjete juures</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* kasutatakse logikirjete juures</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* süsteem üldiselt väldib realtime puhul suuna muutmist st kell on järgmisel hetkel vähem kui eelmisel hetkel, aga see ei ole põhimõtteliselt välistatud</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* süsteem üldiselt väldib realtime puhul suuna muutmist st kell on järgmisel hetkel vähem kui eelmisel hetkel, aga see ei ole põhimõtteliselt välistatud</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>====TSC====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Osutub, et nö oneliner abil seda ei ole hästi võimalik teha.</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4512:rev-4513:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4512&oldid=prev 2026-07-09T16:57:56Z

<p><span dir="auto"><span class="autocomment">Kasutamine</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:57</td> </tr><tr> <td colspan="2" class="diff-lineno">93. rida:</td> <td colspan="2" class="diff-lineno">93. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====clock_gettime(..) funktsioon====</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>====clock_gettime(..) funktsioon====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Operatsioonisüsteemis saab kellaaja (wall-clock-time) väärtust küsida</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-lineno">109. rida:</td> <td colspan="2" class="diff-lineno">111. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>kus</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* ldd näitab, et /bin/date programm sisaldab linux-vdso.so.1 tehnoloogia kasutamist</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* ltrace ehk 'library trace' esitab clock_gettime funktsiooni väljakutse</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* strace ehk 'syscall trace' ei esita clock_gettime() - st antud juhul vDSO tegutseb ja nö intercept'ib enne kui see tegevus jõuab syscall seisusse</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_MONOTONIC====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@ubuntu-2604-01:~# cat clock_monotonic.py</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>#!/usr/bin/python3</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>import time</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>def main():</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> # Retrieve the current value of the monotonic clock (in seconds)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> monotonic_time = time.monotonic()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> print(f"Current clock_monotonic value (seconds): {monotonic_time}")</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> # If you need nanosecond precision, you can use time.monotonic_ns()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> monotonic_ns = time.monotonic_ns()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> print(f"Current clock_monotonic value (nanoseconds): {monotonic_ns}")</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>if __name__ == "__main__":</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> main()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@rv-nspri-01:~# ./clock_monotonic.py</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (seconds): 594952.69380332</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Current clock_monotonic value (nanoseconds): 594952693885526</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@rv-nspri-01:~# echo 594952/86400 | bc</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>6</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@rv-nspri-01:~# uptime</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> 10:49:15 up 6 days, 21:16, 2 users, load average: 0.09, 0.06, 0.01</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>kus</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* python arvutab ja monotonic esitab sekundeid arvuti käivitamisest</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* kasutatakse nt postgresql wal failide aja-põhise salvestamise lubaduse pidamisel (nt salvestada kord minutis)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* süsteem absoluutselt väldib monotonic puhul suuna muutmist, st järgmisel korral on kell rohkem (või samapalu) kui eelmisel (korrektsiooni rakendamisel natuke võidakse venitada või suruda kokku ajutiselt sekundi pikkust arvutis võrreldes SI sekundiga)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>====CLOCK_REALTIME====</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@arvuti-01:~# cat clock_realtime.py</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>#!/usr/bin/python3</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>import time</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>def main():</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> # Retrieve the current value of the realtime clock (in seconds, float)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> realtime = time.time()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> print(f"Current CLOCK_REALTIME value (seconds float): {realtime}")</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> # Nanosecond precision version</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> realtime_ns = time.time_ns()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> print(f"Current CLOCK_REALTIME value (nanoseconds): {realtime_ns}")</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>if __name__ == "__main__":</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> main()</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@arvuti-01:~# ./clock_realtime.py</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Current CLOCK_REALTIME value (seconds float): 1783583224.8868232</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Current CLOCK_REALTIME value (nanoseconds): 1783583224887013724</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@arvuti-01:~# date</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Thu Jul 9 10:47:07 AM EEST 2026</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>root@arvuti-01:~# echo "1783583224/(86400*365)" | bc</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>56</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>kus</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* python arvutab ja realtime esitab sekundeid alates unix epoch alguesest (1. jaanuar 1070)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* kasutatakse logikirjete juures</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* süsteem üldiselt väldib realtime puhul suuna muutmist st kell on järgmisel hetkel vähem kui eelmisel hetkel, aga see ei ole põhimõtteliselt välistatud</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4511:rev-4512:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4511&oldid=prev 2026-07-09T16:45:35Z

<p><span dir="auto"><span class="autocomment">Kasutamine</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:45</td> </tr><tr> <td colspan="2" class="diff-lineno">92. rida:</td> <td colspan="2" class="diff-lineno">92. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Kasutamine===</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Kasutamine===</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>====clock_gettime(..) funktsioon====</div></td> </tr> <tr> <td class="diff-marker">−</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>TODO</div></td> <td colspan="2" class="diff-empty">&#160;</td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$ ldd /bin/date</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> linux-vdso.so.1 (0x00007ffe62d03000)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> libc.so.6 =&gt; /lib/x86_64-linux-gnu/libc.so.6 (0x000079fc36000000)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> /lib64/ld-linux-x86-64.so.2 (0x000079fc362de000)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>imre@arvtui-01:~$ date</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Thu Jul 9 10:33:44 AM EEST 2026</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$ ltrace date 2&gt;&amp;1 | grep clock_</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>clock_gettime(0, 0x7ffc401ed470, 0, 0x5fe5bb239490) = 0</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$ strace date 2&gt;&amp;1 | grep clock_</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>imre@arvuti-01:~$</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4510:rev-4511:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4510&oldid=prev 2026-07-09T16:44:22Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:44</td> </tr><tr> <td colspan="2" class="diff-lineno">70. rida:</td> <td colspan="2" class="diff-lineno">70. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* time keeping engine on väga dünaamiline ja tark - tema juures on muutuv komplekt igasuguseid offset, kalibreerimise jms andmeid, mida oskab vdso tarkvara kasutada, et sünteesida erinevaid kellaaegu (nt wall-clock-time ehk clock_realtime)</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* time keeping engine on väga dünaamiline ja tark - tema juures on muutuv komplekt igasuguseid offset, kalibreerimise jms andmeid, mida oskab vdso tarkvara kasutada, et sünteesida erinevaid kellaaegu (nt wall-clock-time ehk clock_realtime)</div></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* linuxis ei ole kuskil nö mäluaadressi, millelt käiakse lugemas mõne taustatöö poolt seal sees hoitavat mis-kell-on väärtust (mis pidevalt muutub) - mis-kell-on vastus genereeritakse alati käigult küsimusele</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* linuxis ei ole kuskil nö mäluaadressi, millelt käiakse lugemas mõne taustatöö poolt seal sees hoitavat mis-kell-on väärtust (mis pidevalt muutub) - mis-kell-on vastus genereeritakse alati käigult küsimusele</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Misc väited</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* CLOCK_REALTIME - nn wall clock time (nt 8 juuni 2026 kell 13:54:55.002) - allub hüpetele, nt seoses suveajale minekuga</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* CLOCK_MONOTONIC - wall clock time ajaga samas tempos liikuv aeg, st sekund on nö õige sekund, väärtus ei hüppa vaid suureneb ühtlaselt - nt arvutis juhtuvate korduvtegevuste arvestuse pidamiseks</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* põhimõtteliselt on ajaga tegelemisega muu hulgas seotud sellised kvaliteedid: 1. clock - rütm, metronoom, intervall; 2. time - wall clock time</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* timer mõiste ei ole väga aja tegelemisega käesoleva teema raames seotud - timer võimaldab kindlaksmääratud hetkel käivitada mingi tegevuse</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* platvorm st esxi host ei juhi virtuaalse arvuti CLOCK_REALTIME ega CLOCK_MONOTONIC väärtust - seda saaks teha, aga see on virtuaalse arvuti seadistustest välja lülitatud - 'vmware-toolbox-cmd timesync status' → 'Disabled'</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* kui platvorm juhiks CLOCK_REALTIME ja CLOCK_MONOTONIC väärtusi, siis tekiks võistlus chrony/ntpd/systemd-timesyncd/jt lahendustega - on ettekujutus, et virtuaalse arvuti operatsioonisüsteemi vahenditega tekib parem tulemus</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* platvorm tekitab virtuaalsesse arvutisse clocksource ressursid - 'cat /sys/devices/system/clocksource/clocksource0/available_clocksource' - 'tsc hpet acpi_pm'</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* clocksource on nö rütm</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* tsc clocksource on põhimõtteliselt protsessori register - väga täpne, väga odav kasutada jne</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* vmware omad on palju vaeva näinud, et virtuaalse arvuti tsc toimiks kvaliteetselt (füüsilisel arvutil on samuti tsc kasutusel)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* operatsioonisüsteemi madal kiht (mitte chrony) valib välja vmware puhul - 'cat /sys/devices/system/clocksource/clocksource0/current_clocksource' - 'tsc'</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* virtuaalses arvutis töötav ntp klient protsess kasutab kahte sisendit - 1. current_clocksource (tsc) ja 2. ntp time source</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* virtuaalses arvutis töötav ntp klient protsess tekitab ühe väljundi - korrigeerib adjtime() ja clock_adjtime() abil nn 'Linux timekeeping engine' osakonda</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Linux timekeeping engine sisaldab muu hulgas - 1. freqency correction, 2. offset, 3. tick-time conversion</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Linux timekeeping engine tegevusest tuletatakse CLOCK_REALTIME ja CLOCK_MONOTONIC väärtused</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* tsc jt clock source'id on 'immutable'd st operatsioonisüsteemi seest mitte muudetavad</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* tsc counter on 64 bit integer - kui protsessor on 4 GHz siis siis ta teeb 4 G tikset sekundis; 64 bit counter suudab lugeda kokku 2^64 sündmust, st 2^64 / (4* 10^9) = ... = 146 aastat on wraparound aeg</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>===Kasutamine===</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>TODO</div></td> </tr> <!-- diff cache key db_ika-s_ika-:diff:wikidiff2:1.12:old-4509:rev-4510:1.11.0 --> </table>

Imre https://www.auul.pri.ee/wiki/index.php?title=Linux_operatsioonis%C3%BCsteemis_t%C3%B6%C3%B6tab_aeg&diff=4509&oldid=prev 2026-07-09T16:42:02Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 9. juuli 2026, kell 19:42</td> </tr><tr> <td colspan="2" class="diff-lineno">58. rida:</td> <td colspan="2" class="diff-lineno">58. rida:</td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Fail:20260709-linux-tootab-aeg-01.png|1100px]]</div></td> <td class="diff-marker">&#160;</td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Fail:20260709-linux-tootab-aeg-01.png|1100px]]</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>kus</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* joonisel on kujutatud kaks tegevuste komplekti - 1. rakendus saab teada wall-clock-time väärtuse (clock_gettime funktiooni kutsega); 2. Chrony protsess distsiplineerib linux kernel timekeeping subsystem'it ehk 'Time keeping engine'it</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* vDSO on väga oluline element linux operatsioonisüsteemis, ta on üldine nähtus - ta on tehniliselt shared object nagu mingi tavaline teek xxx.so protsessi mälus, aga vdso sünteesib iga protsessi mällu kernel; antud juhul on vdso ülesandeks efektiivselt suhelda kerneliga (tema trikk seisneb selles, et kogu aeg püsitake user space'is)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Time keeping engine töötab kahe sisendiga: 1. rütm/counter/vms cpu tsc registrist, 2. absoluutne kellaaeg ntp serverist (st kujul 8 juuni 2026 kell 13:54:55.002)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* nool joonisel näitab vastuse suunda (nt application esmalt küsib st esitab clock_gettime() funktsiooni väljakutse (mida joonisel ei ole kujutatud) ja saab siis vastuse (mida joonisel kujutatakse)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* vdso koostab tänu oma tarkusele ja kontaktile time keeping engine'iga (ja vist kaudselt ka tsc'ga) libc jaoks wall-clock-time väärtusega vastuse</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* libc annab vastuse üle application protsessile</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* põhimõtteliselt võib linux-time-keeping-engine'it distsiplineerida ka nt systemd-timesyncd protsess</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* time keeping engine on väga dünaamiline ja tark - tema juures on muutuv komplekt igasuguseid offset, kalibreerimise jms andmeid, mida oskab vdso tarkvara kasutada, et sünteesida erinevaid kellaaegu (nt wall-clock-time ehk clock_realtime)</div></td> </tr> <tr> <td colspan="2" class="diff-empty">&#160;</td> <td class="diff-marker">+</td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* linuxis ei ole kuskil nö mäluaadressi, millelt käiakse lugemas mõne taustatöö poolt seal sees hoitavat mis-kell-on väärtust (mis pidevalt muutub) - mis-kell-on vastus genereeritakse alati käigult küsimusele</div></td> </tr> </table>

Imre