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2026-09-05 - 06:30

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 Sat Sep 05, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
166012121110,6sleep10-21swapper/119:06:221
16875211389,19sleep00-21swapper/019:09:530
16737210688,13sleep20-21swapper/219:08:072
1613629785,6sleep30-21swapper/319:05:393
261082780,0sleep10-21swapper/122:40:111
77242710,0sleep10-21swapper/122:21:041
14642570,1sleep30-21swapper/323:53:003
189832300,0sleep00-21swapper/000:10:180
189832300,0sleep00-21swapper/000:10:170
219172270,1sleep30-21swapper/323:08:323
136202250,1sleep30-21swapper/323:32:173
16914992320,2cyclictest8955-21kworker/u8:000:38:042
16914992320,2cyclictest5288-21kworker/u8:000:04:042
1691499220,18cyclictest0-21swapper/222:39:042
244662210,1sleep30-21swapper/323:10:313
1691499211,18cyclictest0-21swapper/223:30:062
1691399212,2cyclictest0-21swapper/120:46:041
1691399210,19cyclictest0-21swapper/121:20:111
16914992017,2cyclictest29330-21kworker/u8:221:37:042
16914992017,2cyclictest28245-21kworker/u8:100:20:062
16914992017,2cyclictest28245-21kworker/u8:100:20:062
16914992017,2cyclictest21664-21kworker/u8:122:03:042
16914991916,2cyclictest5823-21kworker/u8:022:51:042
16914991916,2cyclictest27032-21kworker/u8:222:19:052
1691499190,2cyclictest0-21swapper/223:27:042
1691499190,17cyclictest0-21swapper/223:49:052
16911991916,2cyclictest5823-21kworker/u8:022:39:050
16914991815,2cyclictest5823-21kworker/u8:023:13:042
16914991815,2cyclictest5288-21kworker/u8:000:08:052
16914991815,2cyclictest30306-21kworker/u8:200:32:052
245022170,0sleep00-21swapper/022:05:280
1691599179,6cyclictest23225-21kworker/3:222:38:583
16914991714,2cyclictest3483-21kworker/u8:021:48:042
16914991714,2cyclictest29330-21kworker/u8:221:50:052
16914991714,2cyclictest21451-21kworker/u8:223:18:042
1691499170,16cyclictest0-21swapper/222:10:042
16911991714,2cyclictest21451-21kworker/u8:223:30:050
16911991714,2cyclictest21451-21kworker/u8:223:27:040
16915991612,2cyclictest0-21swapper/300:33:553
1691599161,13cyclictest0-21swapper/321:55:233
16914991613,2cyclictest28245-21kworker/u8:123:55:052
16914991613,2cyclictest17222-21kworker/u8:019:17:052
1691499161,13cyclictest29411-21cpuspeed_turbos21:00:112
1691499160,14cyclictest0-21swapper/200:11:052
1691499160,14cyclictest0-21swapper/200:11:042
1691599151,12cyclictest18565-21diskstats00:10:153
1691599151,12cyclictest18565-21diskstats00:10:143
16915991510,3cyclictest24939-21ssh23:44:253
16915991510,3cyclictest21639-21iostat_ios21:30:163
1691599150,3cyclictest0-21swapper/321:43:353
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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