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2026-04-02 - 02:31
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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 Apr 01, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21161211421,50sleep10-21swapper/106:59:171
21161211421,50sleep10-21swapper/106:59:171
22805991093,68cyclictest2113-21apt-get10:04:211
22805999242,13cyclictest181rcu_preempt10:29:411
22789999165,18cyclictest14441-21kworker/u19:2-rpciod12:29:380
22789999117,37cyclictest15-21ksoftirqd/009:35:130
22789999117,37cyclictest15-21ksoftirqd/009:35:130
22789999117,37cyclictest15-21ksoftirqd/009:35:130
22816999037,14cyclictest0-21swapper/209:16:212
2280599876,49cyclictest29554-21apt-get10:49:291
22789998637,17cyclictest181rcu_preempt10:58:470
22789998637,17cyclictest181rcu_preempt10:58:470
22789998625,22cyclictest15-21ksoftirqd/010:33:320
2278999852,38cyclictest15-21ksoftirqd/010:20:490
22816998464,11cyclictest0-21swapper/209:49:062
22816998443,9cyclictest181rcu_preempt12:07:272
2281699842,59cyclictest16352-21apt-get09:34:222
2281699842,59cyclictest16352-21apt-get09:34:222
2281699842,59cyclictest16352-21apt-get09:34:222
22805998457,11cyclictest181rcu_preempt07:19:261
22805998436,12cyclictest181rcu_preempt08:44:361
22805998435,20cyclictest594-21latency_hist07:34:071
2278999847,41cyclictest15-21ksoftirqd/007:33:480
2278999844,41cyclictest15-21ksoftirqd/010:08:500
22816998361,14cyclictest0-21swapper/208:09:062
22816998350,8cyclictest181rcu_preempt08:44:222
22805998342,11cyclictest181rcu_preempt12:18:321
2278999832,29cyclictest15-21ksoftirqd/008:49:040
22816998258,15cyclictest18603-21apt-key12:19:062
22816998242,18cyclictest22763-21cyclictest12:30:022
22816998238,9cyclictest0-21swapper/208:59:252
22816998238,9cyclictest0-21swapper/208:59:252
2281699823,57cyclictest13812-21apt-get10:24:182
22805998256,11cyclictest181rcu_preempt10:48:041
22805998256,11cyclictest181rcu_preempt10:48:041
22805998238,12cyclictest181rcu_preempt11:29:261
22805998229,25cyclictest0-21swapper/112:04:251
22805998226,33cyclictest0-21swapper/110:35:471
2278999824,49cyclictest15-21ksoftirqd/011:55:030
219792827,50sleep222062-21unixbench_multi06:59:512
219792827,50sleep222062-21unixbench_multi06:59:512
22816998164,11cyclictest26486-21ssh10:44:212
22816998164,11cyclictest26486-21ssh10:44:212
22816998161,10cyclictest0-21swapper/207:44:072
22816998147,8cyclictest181rcu_preempt11:39:452
22805998154,19cyclictest25871-21ssh09:49:321
22805998130,15cyclictest181rcu_preempt07:59:321
2278999817,42cyclictest15-21ksoftirqd/011:14:150
22789998116,37cyclictest15-21ksoftirqd/012:19:010
221922816,59sleep00-21swapper/007:00:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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