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2026-06-27 - 10:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot7s.osadl.org (updated Sat Jun 27, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
939421290,0sleep10-21swapper/100:13:201
3228129975,19sleep20-21swapper/219:07:192
3216229279,9sleep00-21swapper/019:05:450
3233429064,9sleep30-21swapper/319:08:013
3214828464,15sleep10-21swapper/119:05:341
322002590,0sleep00-21swapper/022:11:010
3259699371,34cyclictest389-21kworker/3:000:31:333
3259699370,37cyclictest389-21kworker/3:000:08:443
32589992624,1cyclictest0-21swapper/122:57:481
3258999251,2cyclictest25374-21diskmemload22:21:271
3259699243,2cyclictest16646-21runrttasks22:21:073
3259699240,5cyclictest29990-21kworker/3:122:07:363
3259499247,13cyclictest4956-21ssh23:31:482
3259499240,23cyclictest29352-21strings21:50:182
32596992321,2cyclictest29990-21kworker/3:121:35:243
3259699220,21cyclictest29990-21kworker/3:121:40:033
32589992222,0cyclictest0-21swapper/123:18:251
3259699210,1cyclictest0-21swapper/321:19:563
32589992116,3cyclictest0-21swapper/121:16:051
3258999210,4cyclictest0-21swapper/122:19:031
3258799212,14cyclictest537-21snmpd23:39:020
3259499200,2cyclictest0-21swapper/222:34:272
3258999200,1cyclictest0-21swapper/121:46:551
3258799201,16cyclictest0-21swapper/022:26:160
3258799200,19cyclictest0-21swapper/000:15:130
3259699190,13cyclictest0-21swapper/320:25:153
32594991918,1cyclictest0-21swapper/200:15:142
3258999195,12cyclictest13485-21/usr/sbin/munin00:15:201
32589991918,1cyclictest0-21swapper/122:50:251
32589991917,2cyclictest25-21ksoftirqd/100:37:341
3258999190,1cyclictest0-21swapper/121:29:361
3258999190,18cyclictest0-21swapper/123:42:301
32587991918,1cyclictest13-21ksoftirqd/000:35:390
32587991918,1cyclictest0-21swapper/023:25:460
3258799190,2cyclictest0-21swapper/022:41:440
3259499182,12cyclictest4870-21fschecks_time21:55:172
3258999181,2cyclictest0-21swapper/122:45:161
3258999180,16cyclictest0-21swapper/123:22:551
3258799180,0cyclictest0-21swapper/021:57:090
3259699171,3cyclictest29990-21kworker/3:122:16:253
3259499174,1cyclictest141rcu_preempt00:34:092
3259499172,2cyclictest22902-21kworker/2:121:17:442
32594991715,1cyclictest0-21swapper/200:01:412
32587991717,0cyclictest0-21swapper/023:34:200
32587991716,1cyclictest0-21swapper/023:47:460
32587991716,1cyclictest0-21swapper/023:47:450
32587991714,2cyclictest13-21ksoftirqd/023:13:170
32596991613,3cyclictest39-21ksoftirqd/322:55:243
3259699160,1cyclictest0-21swapper/322:37:423
3259699160,16cyclictest29990-21kworker/3:121:58:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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