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2026-06-08 - 05:24

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 Mon Jun 08, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23678210289,9sleep00-21swapper/019:08:420
2216629876,16sleep30-21swapper/319:05:153
2370529464,18sleep20-21swapper/219:09:042
2141028567,13sleep10-21swapper/119:05:011
2386899265,6cyclictest141rcu_preempt23:00:130
2387199250,23cyclictest0-21swapper/123:21:491
2386899254,9cyclictest16929-21diskmemload22:10:140
2387199240,1cyclictest0-21swapper/120:45:131
23871992320,2cyclictest17358-21/usr/sbin/munin21:10:261
2387199230,21cyclictest0-21swapper/123:08:491
2387799225,7cyclictest39-21ksoftirqd/300:17:243
23871992221,1cyclictest0-21swapper/122:59:361
23871992220,1cyclictest31102-21/usr/sbin/munin23:15:181
23871992219,2cyclictest791-21/usr/sbin/munin23:55:171
23868992222,0cyclictest0-21swapper/021:25:510
23868992219,2cyclictest2531-21/usr/sbin/munin21:40:270
2387799211,3cyclictest39-21ksoftirqd/300:10:203
2387799211,3cyclictest39-21ksoftirqd/300:10:203
23875992119,1cyclictest15472-21/usr/sbin/munin23:25:182
2386899214,6cyclictest141rcu_preempt21:55:370
23868992119,1cyclictest29415-21/usr/sbin/munin22:35:190
23868992119,1cyclictest21101-21/usr/sbin/munin22:30:150
23868992119,1cyclictest17421-21/usr/sbin/munin00:05:150
2386899210,1cyclictest0-21swapper/022:01:320
2387799206,2cyclictest381rcuc/322:30:143
23877992015,5cyclictest27503-21kworker/u8:023:09:183
23877992015,2cyclictest381rcuc/322:45:253
23875992017,2cyclictest17421-21/usr/sbin/munin00:05:272
23871992018,1cyclictest9182-21/usr/sbin/munin00:00:261
23871992011,1cyclictest141rcu_preempt22:33:231
2387199200,1cyclictest141rcu_preempt22:06:491
2387199200,0cyclictest141rcu_preempt21:29:431
23868992020,0cyclictest0-21swapper/021:17:380
2386899200,3cyclictest0-21swapper/023:23:560
2386899200,0cyclictest0-21swapper/021:23:320
23877991918,1cyclictest381rcuc/300:28:503
23877991918,1cyclictest0-21swapper/323:13:043
23877991916,2cyclictest32138-21/usr/sbin/munin23:35:143
23877991916,2cyclictest28491-21/usr/sbin/munin22:15:213
23877991916,1cyclictest18794-21http21:50:003
23877991914,5cyclictest39-21ksoftirqd/322:01:383
2387799190,3cyclictest0-21swapper/323:53:413
2387799190,1cyclictest141rcu_preempt00:00:583
23875991918,1cyclictest0-21swapper/220:38:592
23875991917,1cyclictest10078-21/usr/sbin/munin00:20:172
2387199193,10cyclictest141rcu_preempt21:39:591
2387199191,2cyclictest141rcu_preempt22:46:371
2387199190,1cyclictest0-21swapper/121:19:591
115242190,0sleep20-21swapper/222:43:412
23877991816,1cyclictest381rcuc/319:40:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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