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2026-05-31 - 04:19

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 100 highest latencies:
System rack7slot7s.osadl.org (updated Sun May 31, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
724829682,9sleep00-21swapper/019:06:500
737029279,9sleep20-21swapper/219:08:242
723128663,6sleep30-21swapper/319:06:363
728028366,13sleep10-21swapper/119:07:161
256902330,0sleep20-21swapper/221:25:002
758599280,28cyclictest0-21swapper/221:42:492
757999280,0cyclictest0-21swapper/000:34:080
758599250,25cyclictest0-21swapper/222:18:252
758599240,24cyclictest0-21swapper/221:50:452
120732240,0sleep10-21swapper/121:15:521
758899231,22cyclictest0-21swapper/319:30:143
758599230,23cyclictest0-21swapper/223:01:172
757999230,1cyclictest0-21swapper/023:04:510
758899221,21cyclictest0-21swapper/321:50:593
7583992118,1cyclictest0-21swapper/122:45:001
758899200,2cyclictest0-21swapper/322:15:143
758899200,1cyclictest0-21swapper/323:50:193
7588991918,1cyclictest0-21swapper/322:25:263
758599180,1cyclictest141rcu_preempt22:05:152
758599180,16cyclictest0-21swapper/221:38:322
758399180,1cyclictest0-21swapper/123:27:321
757999187,5cyclictest25882-21perf20:55:000
757999183,14cyclictest1853-21apt-get20:05:130
757999180,2cyclictest0-21swapper/023:14:350
757999180,1cyclictest0-21swapper/022:33:070
7588991715,1cyclictest587-21diskmemload22:38:043
758899171,0cyclictest141rcu_preempt22:52:163
758599170,16cyclictest0-21swapper/223:17:222
7583991715,1cyclictest0-21swapper/100:30:131
758399171,3cyclictest0-21swapper/119:30:141
758399170,17cyclictest0-21swapper/123:30:151
757999170,0cyclictest0-21swapper/023:22:500
758899164,3cyclictest141rcu_preempt19:20:133
758899163,8cyclictest9441-21/usr/sbin/munin21:15:273
758899162,5cyclictest141rcu_preempt20:45:153
7588991611,2cyclictest39-21ksoftirqd/300:30:163
758899161,10cyclictest18336-21idleruntime-cro21:40:003
758899160,15cyclictest0-21swapper/323:20:143
758599160,16cyclictest0-21swapper/221:18:272
758599160,16cyclictest0-21swapper/200:02:082
758599160,14cyclictest0-21swapper/200:31:352
758599160,0cyclictest0-21swapper/221:27:142
7583991615,1cyclictest25-21ksoftirqd/100:00:321
757999160,1cyclictest0-21swapper/022:58:230
758899159,2cyclictest39-21ksoftirqd/321:59:443
7588991512,2cyclictest0-21swapper/321:20:233
758899150,2cyclictest0-21swapper/322:58:103
758899150,10cyclictest5069-21kworker/3:000:01:083
758599152,11cyclictest9446-21ssh00:08:352
7585991514,1cyclictest8228-21grep20:15:212
7585991513,2cyclictest0-21swapper/200:25:222
7585991511,3cyclictest1890-21taskset23:05:502
7583991514,1cyclictest0-21swapper/123:39:241
7583991514,1cyclictest0-21swapper/122:10:241
758399150,14cyclictest0-21swapper/122:51:481
758399150,0cyclictest0-21swapper/123:06:061
757999154,6cyclictest175842sleep022:36:440
757999152,7cyclictest19392-21sendmail-msp21:59:590
7579991514,1cyclictest0-21swapper/000:15:590
757999150,8cyclictest12397-21sendmail19:20:010
758899147,3cyclictest10207-21kworker/3:200:25:223
7588991413,1cyclictest381rcuc/323:34:203
758899141,1cyclictest141rcu_preempt21:33:323
7588991411,2cyclictest25863-21sh20:55:003
7588991411,2cyclictest10418-21wc20:20:193
7588991410,3cyclictest17000-21grep23:15:173
7588991410,3cyclictest16645-21grep20:35:153
7588991410,1cyclictest39-21ksoftirqd/321:11:523
758899140,4cyclictest0-21swapper/300:07:053
758899140,1cyclictest141rcu_preempt22:23:383
758899140,1cyclictest0-21swapper/300:21:583
758599144,9cyclictest6138-21ssh21:32:012
7585991410,2cyclictest28657-21grep21:00:152
758399145,6cyclictest38150irq/131-snd_hda22:00:471
7583991413,1cyclictest0-21swapper/121:45:261
758399141,12cyclictest0-21swapper/100:30:001
7583991410,3cyclictest8407-21ssh23:10:161
7583991410,3cyclictest38150irq/131-snd_hda21:20:211
7583991410,3cyclictest26545-21grep23:20:261
758399140,1cyclictest0-21swapper/123:58:091
757999141,5cyclictest6147-21basename22:50:010
7579991414,0cyclictest0-21swapper/021:46:330
7579991411,2cyclictest6352-21ssh00:06:220
7579991411,2cyclictest6322-21awk22:10:250
7579991410,3cyclictest17938-21grep21:20:140
758899139,3cyclictest39-21ksoftirqd/323:39:323
758899139,3cyclictest30553-21wc19:55:203
758899139,3cyclictest25324-21chrt19:45:153
758899135,7cyclictest0-21swapper/321:26:483
758899131,4cyclictest39-21ksoftirqd/319:40:203
758899131,2cyclictest587-21diskmemload23:49:063
7588991312,1cyclictest381rcuc/323:56:233
758899131,12cyclictest0-21swapper/322:31:043
7588991310,2cyclictest21498-21head00:15:183
7588991310,2cyclictest1412-21ssh23:25:173
758899130,12cyclictest22375-21cut22:40:143
758899130,12cyclictest0-21swapper/322:09:373
758599139,3cyclictest32-21ksoftirqd/200:25:002
7585991311,1cyclictest22275-21/usr/sbin/munin22:40:192
7585991310,2cyclictest5680-21grep22:30:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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