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2026-06-14 - 09:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot6s.osadl.org (updated Sun Jun 14, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1127321360,1sleep311272-21sh21:47:373
23494210897,6sleep00-21swapper/019:05:470
23442210887,16sleep10-21swapper/119:05:201
24020210796,6sleep20-21swapper/219:07:262
24021210487,12sleep30-21swapper/319:07:273
305692760,0sleep30-21swapper/320:45:133
186972710,0sleep30-21swapper/300:14:363
64582700,0sleep00-21swapper/023:25:380
222842700,0sleep10-21swapper/100:17:461
59222670,0sleep20-21swapper/223:25:162
72602260,1sleep10-21swapper/122:17:331
153682260,0sleep20-21swapper/221:51:372
324192240,1sleep20-21swapper/222:45:122
2425099221,2cyclictest7252-21diskmemload23:00:110
256872200,1sleep1221ktimersoftd/122:37:131
2425299203,2cyclictest31-21ksoftirqd/221:55:142
2425299201,14cyclictest0-21swapper/223:45:042
286162190,0sleep20-21swapper/220:40:152
254672180,1sleep30-21swapper/320:31:033
24252991815,2cyclictest635-21kworker/u8:323:39:042
24252991815,2cyclictest3360-21kworker/u8:200:35:042
2425299181,15cyclictest0-21swapper/223:40:282
2425099180,2cyclictest0-21swapper/021:55:140
24253991714,2cyclictest16665-21kworker/u8:223:03:043
2425399171,3cyclictest27213-21ssh00:23:153
2425299170,12cyclictest0-21swapper/222:32:052
2425399161,3cyclictest0-21swapper/323:10:123
24253991613,2cyclictest7919-21kworker/u8:122:24:043
24253991613,2cyclictest7919-21kworker/u8:122:24:043
24253991613,2cyclictest16059-21kworker/u8:122:11:043
2425399161,13cyclictest8953-21ssh21:10:473
2425399161,13cyclictest16664-21taskset21:53:393
24252991613,2cyclictest836-21kworker/u8:221:42:042
24252991613,2cyclictest7737-21kworker/u8:019:11:042
24252991613,2cyclictest26547-21kworker/u8:000:28:042
24252991613,2cyclictest23622-21kworker/u8:021:00:012
24252991613,2cyclictest16059-21kworker/u8:122:03:042
24252991613,2cyclictest11964-21kworker/u8:020:11:042
2425299161,2cyclictest0-21swapper/223:16:012
2425299160,15cyclictest0-21swapper/200:14:052
2425399151,3cyclictest18209-21ssh21:20:293
24253991512,2cyclictest8149-21kworker/u8:023:29:043
24253991512,2cyclictest19229-21kworker/u8:123:44:033
2425299152,7cyclictest0-21swapper/221:30:002
24252991512,2cyclictest836-21kworker/u8:221:34:042
24252991512,2cyclictest7474-21kworker/u8:100:02:042
24252991512,2cyclictest3728-21runrttasks23:14:582
24252991512,2cyclictest32585-21kworker/u8:019:44:042
24252991512,2cyclictest30604-21kworker/u8:122:44:032
24252991512,2cyclictest30225-21kworker/u8:219:32:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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