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2026-08-05 - 13:45
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Wed Aug 05, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
127069910615,81cyclictest20316-21kworker/u17:1+ext4-rsv-conversion22:00:512
127069910615,81cyclictest20316-21kworker/u17:1+ext4-rsv-conversion22:00:512
12699991062,95cyclictest26642-21apt-get21:06:570
127049910389,8cyclictest0-21swapper/121:05:511
127069910213,78cyclictest18209-21apt-get20:50:482
12699999772,16cyclictest15183-21latency_hist21:40:370
12699999772,16cyclictest15183-21latency_hist21:40:370
12706999450,16cyclictest181rcu_preempt20:55:502
1270499942,68cyclictest11504-21apt-get20:30:511
12706999364,19cyclictest17460-21sshd20:21:382
12704999373,14cyclictest21235-21switchtime20:56:111
12704999356,14cyclictest7174-21sh21:26:101
12704999356,14cyclictest7174-21sh21:26:101
1177929313,57sleep011813-21wc18:51:160
1177929313,57sleep011813-21wc18:51:160
1270499923,76cyclictest6415-21apt-get20:15:491
1270499923,76cyclictest6415-21apt-get20:15:491
1270499922,65cyclictest29308-21apt-get21:10:491
1270499922,65cyclictest29308-21apt-get21:10:491
12706999163,21cyclictest13876-21cstates00:20:552
1254229112,53sleep212549-21modprobe18:55:342
1254229112,53sleep212549-21modprobe18:55:342
12706999044,11cyclictest181rcu_preempt20:40:372
12699998970,13cyclictest3323-21latency_hist20:05:380
12699998970,13cyclictest3323-21latency_hist20:05:380
113882898,57sleep111390-21entropy18:51:011
113882898,57sleep111390-21entropy18:51:011
12706998860,21cyclictest10018-21sh00:14:262
12706998860,21cyclictest10018-21sh00:14:262
1269999882,65cyclictest29308-21apt-get21:10:530
1269999882,65cyclictest29308-21apt-get21:10:530
1269999873,37cyclictest3804-21ls22:15:370
1269999873,37cyclictest3804-21ls22:15:370
12706998661,18cyclictest18346-21fschecks_count19:10:572
12706998645,11cyclictest181rcu_preempt00:07:082
1270699859,67cyclictest29846-21apt-get21:10:532
1270699859,67cyclictest29846-21apt-get21:10:532
12706998555,11cyclictest181rcu_preempt23:15:452
12706998555,11cyclictest181rcu_preempt23:15:452
12706998545,15cyclictest20070-21diskmemload23:15:372
1270699852,51cyclictest12604-21munin-plugin-st22:30:332
12704998365,11cyclictest2374-21systemd-journal22:27:381
12699998363,14cyclictest20070-21diskmemload21:26:010
12699998363,14cyclictest20070-21diskmemload21:26:010
12706998258,16cyclictest26075-21latency_hist21:05:392
12706998258,16cyclictest26075-21latency_hist21:05:392
12704998259,15cyclictest28168-21ssh23:50:531
12704998127,22cyclictest21356-21taskset21:50:481
12704998127,22cyclictest21356-21taskset21:50:481
12704998127,21cyclictest3999-21ssh23:10:361
12704998127,21cyclictest3999-21ssh23:10:361
12699998158,16cyclictest29367-21latency_hist19:45:370
12706998041,13cyclictest181rcu_preempt22:36:072
12704998024,21cyclictest14751-21rm23:27:261
12699998064,10cyclictest19374-21rm21:46:140
12699998057,14cyclictest24186-21latency_hist21:55:380
12699998057,14cyclictest24186-21latency_hist21:55:380
12706997956,16cyclictest4603-21apt-key00:05:392
1270699794,55cyclictest12631-21ssh21:35:482
1270699794,55cyclictest12631-21ssh21:35:482
1270699793,33cyclictest13536-21awk18:56:082
12704997961,12cyclictest277-21dbus-daemon22:15:351
12704997961,12cyclictest277-21dbus-daemon22:15:351
12704997960,12cyclictest27308-21latency_hist22:00:381
12704997939,12cyclictest181rcu_preempt22:56:011
12704997935,35cyclictest0-21swapper/119:00:521
12704997921,25cyclictest0-21swapper/123:49:111
12699997963,10cyclictest17752-21unixbench_multi20:46:110
1269999794,30cyclictest352-21runrttasks22:21:190
12699997913,42cyclictest23924-21unixbench_multi19:26:130
12699997913,42cyclictest23924-21unixbench_multi19:26:130
12714997844,24cyclictest15238-21taskset20:40:533
12706997856,16cyclictest300-21rs:main2
12706997847,9cyclictest181rcu_preempt20:25:522
12706997847,9cyclictest181rcu_preempt20:25:522
12706997845,11cyclictest181rcu_preempt21:40:462
12706997845,10cyclictest181rcu_preempt21:25:512
12706997845,10cyclictest181rcu_preempt21:25:512
12704997862,11cyclictest1-21systemd22:19:221
12704997857,12cyclictest24888-21diskmemload22:50:521
12704997857,12cyclictest24888-21diskmemload22:50:521
12704997830,37cyclictest12599-21apt-get21:35:511
12704997830,37cyclictest12599-21apt-get21:35:511
12704997829,18cyclictest12271-21ssh23:23:541
12704997825,25cyclictest20070-21diskmemload21:40:451
12704997822,24cyclictest0-21swapper/100:19:111
12704997815,29cyclictest0-21swapper/100:05:531
12706997757,14cyclictest30790-21sh23:00:512
12706997757,14cyclictest29612-21sh19:45:542
12706997748,8cyclictest181rcu_preempt19:50:462
12706997745,9cyclictest181rcu_preempt22:41:102
12706997740,13cyclictest39-21ksoftirqd/222:49:072
12706997734,10cyclictest181rcu_preempt23:26:122
12704997756,13cyclictest12689-21cyclictest00:04:451
12704997731,36cyclictest387-21apt-get21:15:471
12704997726,23cyclictest15760-21taskset00:23:491
12704997725,20cyclictest9574-21seq20:21:591
12699997752,18cyclictest3239-21latency_hist21:20:370
12699997749,21cyclictest24619-21fschecks_time21:55:580
1270699765,52cyclictest1710-21latency_hist20:00:372
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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