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2025-03-25 - 22:39
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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 Tue Mar 25, 2025 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31836211411,75sleep30-21swapper/307:07:513
3105421087,61sleep231097-21mailstats07:03:302
319409910646,51cyclictest0-21swapper/208:47:492
319409910242,11cyclictest0-21swapper/207:33:262
31933999429,38cyclictest3239-21sendmail_mailst11:08:320
31933999429,38cyclictest3239-21sendmail_mailst11:08:320
31933999334,18cyclictest0-21swapper/009:27:560
31933999329,33cyclictest13253-21ssh12:27:490
3047529321,34sleep00-21swapper/007:03:080
61462900,5sleep131612-21kworker/u8:110:11:021
31933999052,28cyclictest10890-21latency_hist11:22:520
31933999041,28cyclictest6817-21diskmemload10:32:530
31933998928,22cyclictest30472-21grep10:58:100
31933998928,22cyclictest30472-21grep10:58:100
31933998922,22cyclictest23068-21apt-get08:18:320
3193499872,60cyclictest25-21ksoftirqd/108:18:031
31933998736,19cyclictest4495-21unixbench_multi08:58:240
31933998736,19cyclictest4495-21unixbench_multi08:58:240
31933998730,33cyclictest23894-21sh10:47:030
3194099867,21cyclictest0-21swapper/212:33:012
31933998625,35cyclictest22137-21ssh10:42:320
31933998623,18cyclictest26854-21ssh10:52:250
3099428613,34sleep10-21swapper/107:03:251
31933998535,20cyclictest4047-21ssh12:10:070
31933998531,26cyclictest10430-21ssh12:21:140
31933998530,30cyclictest17027-21ssh12:33:250
31933998328,21cyclictest13272-21ps09:18:210
31933998313,45cyclictest6485-21runrttasks11:13:430
31933998313,45cyclictest6485-21runrttasks11:13:430
3195199824,53cyclictest32201-21apt-get09:58:053
31951998234,9cyclictest141rcu_preempt07:42:493
31933998225,33cyclictest11230-21rm10:19:180
3193499813,57cyclictest31627-21apt-get09:58:021
31933998166,8cyclictest17957-21apt-get08:03:040
31933998128,27cyclictest27446-21cstates10:53:070
31933998128,25cyclictest2138-21latency07:13:150
31933998128,25cyclictest2138-21latency07:13:150
31933998128,19cyclictest2072-21systemctl12:07:490
31933998128,19cyclictest2072-21systemctl12:07:490
31933998127,29cyclictest5967-21sh10:10:290
31933998127,24cyclictest402-21runrttasks08:13:000
31933998126,20cyclictest0-21swapper/011:45:250
31933998125,32cyclictest32380-21chrt08:46:070
31951998032,26cyclictest0-21swapper/310:18:593
31934998029,24cyclictest141rcu_preempt11:56:471
31934998029,24cyclictest141rcu_preempt11:56:471
31933998029,19cyclictest7933-21cron07:32:490
31933998028,18cyclictest32315-21ssh09:58:200
31933998027,21cyclictest15569-21ssh10:28:550
31933998026,21cyclictest20274-21sh11:39:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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