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2026-06-12 - 07:45

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 Fri Jun 12, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
174721200,0sleep30-21swapper/323:50:183
2988329065,9sleep00-21swapper/019:07:340
3002928774,9sleep20-21swapper/219:09:292
2928328470,9sleep30-21swapper/319:05:243
2982528366,13sleep10-21swapper/119:06:511
252062700,0sleep20-21swapper/222:46:582
157062620,1sleep013-21ksoftirqd/021:25:010
30165992827,1cyclictest0-21swapper/123:09:231
3016599280,0cyclictest0-21swapper/123:19:021
3016599270,1cyclictest0-21swapper/123:47:481
3016799260,26cyclictest0-21swapper/222:50:392
3016599260,1cyclictest0-21swapper/100:00:131
3016599250,2cyclictest0-21swapper/122:31:151
3016599250,2cyclictest0-21swapper/122:31:151
3016599250,1cyclictest0-21swapper/121:37:141
30167992421,2cyclictest23215-21apache_volume21:10:132
3016599240,1cyclictest0-21swapper/122:02:241
3016599230,1cyclictest0-21swapper/122:08:361
3016599230,0cyclictest0-21swapper/122:27:271
3016599230,0cyclictest0-21swapper/122:27:271
30160992320,2cyclictest1480-21/usr/sbin/munin21:55:210
3016799220,19cyclictest0-21swapper/200:30:392
30165992220,1cyclictest9350-21df_inode21:40:151
3016599220,0cyclictest0-21swapper/123:53:051
30160992220,1cyclictest4417-21apache_volume22:35:120
30170992118,2cyclictest30119-21python22:30:253
30170992118,2cyclictest30119-21python22:30:253
3017099210,19cyclictest0-21swapper/323:06:483
30167992119,1cyclictest9894-21/usr/sbin/munin22:00:262
30165992119,1cyclictest0-21swapper/121:05:111
3016599210,1cyclictest0-21swapper/123:29:021
30160992119,1cyclictest23046-21munin-run23:25:000
30160992118,2cyclictest598-21irqstats23:30:190
3016099210,1cyclictest141rcu_preempt00:10:110
30170992018,1cyclictest6047-21python22:35:263
30170992017,2cyclictest24257-21/usr/sbin/munin21:30:113
30167992018,1cyclictest13388-21df22:40:162
30167992017,2cyclictest18271-21/usr/sbin/munin22:05:182
3016799200,15cyclictest0-21swapper/221:45:132
3016799200,0cyclictest0-21swapper/223:09:562
30165992014,3cyclictest0-21swapper/121:51:261
3016599200,1cyclictest0-21swapper/122:57:211
3016099208,1cyclictest22722-21diskmemload21:36:210
3016099200,1cyclictest0-21swapper/022:03:400
313962190,0chrt0-21swapper/022:31:100
313962190,0chrt0-21swapper/022:31:090
30170991919,0cyclictest0-21swapper/323:40:433
3017099190,18cyclictest0-21swapper/323:36:053
3016799190,19cyclictest0-21swapper/223:32:162
3016799190,19cyclictest0-21swapper/221:22:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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