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2025-07-16 - 13:07
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Wed Jul 16, 2025 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2595422250,30sleep30-21swapper/319:01:063
26470215113,96sleep025759-21/usr/sbin/munin19:01:250
2540321060,8sleep30-21swapper/300:30:593
272469910277,15cyclictest31385-21kworker/u19:0+flush-179:023:05:541
2703521016,15sleep10-21swapper/119:04:521
264372990,8sleep30-21swapper/322:41:053
264372990,8sleep30-21swapper/322:41:053
27246999774,16cyclictest25495-21latency_hist21:45:431
27236999360,10cyclictest181rcu_preempt22:00:570
27257999151,31cyclictest20303-21cut21:36:052
27257999151,31cyclictest20303-21cut21:36:052
2723699913,49cyclictest22962-21grep21:40:570
2724699902,38cyclictest527-21grep22:51:211
2724699902,38cyclictest527-21grep22:51:211
27246999014,59cyclictest24434-21apt-get20:36:141
27257998918,32cyclictest16193-21kworker/u19:0+rpciod00:35:252
27246998959,22cyclictest11520-21sendmail19:55:401
2724699894,62cyclictest2178-21diskmemload22:36:031
2723699897,51cyclictest29174-21cstates23:40:580
27257998841,36cyclictest4029-21cat19:31:052
27257998812,29cyclictest3602-21unixbench_singl21:06:232
2724699885,59cyclictest14308-21ssh22:21:041
2724699885,59cyclictest14308-21ssh22:21:041
27257998767,14cyclictest364-21ntpd22:31:142
27246998763,16cyclictest2178-21diskmemload21:05:441
27246998763,16cyclictest2178-21diskmemload21:05:441
2723699877,69cyclictest29708-21apt-get19:10:560
27257998563,16cyclictest10998-21latency_hist22:15:442
2725799856,27cyclictest0-21swapper/221:21:392
2725799856,27cyclictest0-21swapper/221:21:392
27246998560,17cyclictest384-21sshd00:06:411
27246998560,17cyclictest384-21sshd00:06:411
27246998546,30cyclictest17742-21kworker/u18:3+nfsiod23:47:201
27246998546,30cyclictest17742-21kworker/u18:3+nfsiod23:47:201
2723699853,51cyclictest22627-21apt-get22:35:550
2723699853,45cyclictest24434-21apt-get20:35:410
27236998525,37cyclictest31001-21grep20:51:190
27257998464,14cyclictest29109-21munin-node00:26:112
2725799843,54cyclictest2638-21apt-get22:56:092
27246998454,20cyclictest16932-21latency_hist00:15:441
27246998454,20cyclictest16932-21latency_hist00:15:441
2723699834,61cyclictest5149-21latency_hist23:55:430
27257998261,15cyclictest11627-21fschecks_count00:06:032
27257998261,15cyclictest11627-21fschecks_count00:06:032
2725799823,63cyclictest23353-21ssh22:36:182
2725799823,56cyclictest24960-21apt-get20:36:142
27246998263,11cyclictest13717-21systemd-run22:20:401
27257998154,20cyclictest8304-21idleruntime-cro19:45:402
27257998154,20cyclictest8304-21idleruntime-cro19:45:402
27246998142,27cyclictest11717-21kworker/u18:0+nfsiod21:29:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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