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2026-07-18 - 02:45

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 Sat Jul 18, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31957210090,6sleep00-21swapper/019:07:500
3203129165,8sleep20-21swapper/219:08:482
3189528564,6sleep10-21swapper/119:07:031
3197028468,12sleep30-21swapper/319:08:023
126542740,1sleep232-21ksoftirqd/222:37:532
32232992725,1cyclictest12819-21apache221:35:591
32232992413,11cyclictest25-21ksoftirqd/121:24:231
3223299230,1cyclictest0-21swapper/121:14:041
32237992222,0cyclictest0-21swapper/322:29:113
3223799222,15cyclictest31002-21apache_accesses00:25:103
3223799220,3cyclictest0-21swapper/322:59:073
3223799220,2cyclictest141rcu_preempt23:56:083
3223799220,21cyclictest0-21swapper/322:35:363
3223799211,3cyclictest0-21swapper/321:46:433
3223799210,2cyclictest0-21swapper/322:03:433
3223799210,2cyclictest0-21swapper/300:12:393
32232992118,2cyclictest12807-21apache221:16:341
3223299211,13cyclictest0-21swapper/122:20:121
3223299210,2cyclictest0-21swapper/123:20:201
32237992019,1cyclictest0-21swapper/323:19:373
32234992017,2cyclictest0-21swapper/223:05:192
3223499200,17cyclictest0-21swapper/222:10:452
3223299201,15cyclictest0-21swapper/121:55:141
3223799180,4cyclictest0-21swapper/321:23:183
3223799180,18cyclictest0-21swapper/323:28:483
3223499180,18cyclictest0-21swapper/223:21:262
32232991815,3cyclictest25-21ksoftirqd/123:50:141
3223299181,16cyclictest28967-21kworker/1:200:05:491
3223299180,17cyclictest0-21swapper/121:42:301
32227991815,2cyclictest13-21ksoftirqd/022:20:030
3222799180,1cyclictest0-21swapper/021:39:200
3222799180,0cyclictest0-21swapper/023:04:190
3223799179,8cyclictest0-21swapper/322:41:403
32234991714,1cyclictest141rcu_preempt23:01:072
3223499170,1cyclictest0-21swapper/200:38:002
32232991715,1cyclictest0-21swapper/100:30:171
3223299170,16cyclictest25447-21diskmemload23:05:191
3223799165,9cyclictest23813-21cron20:00:003
3223799160,1cyclictest0-21swapper/320:55:143
32234991615,1cyclictest0-21swapper/200:30:242
3223499160,16cyclictest0-21swapper/222:16:222
3223499160,14cyclictest0-21swapper/222:00:222
3223299166,5cyclictest225-21systemd-journal20:50:001
32237991512,2cyclictest19409-21kworker/u8:300:03:023
3223799150,1cyclictest0-21swapper/323:53:463
32234991515,0cyclictest0-21swapper/221:18:092
3223499151,12cyclictest24484-21ntp_states22:25:212
3222799158,7cyclictest16193-21munin-node23:34:540
32227991510,2cyclictest32222-21cyclictest21:24:230
32237991414,0cyclictest0-21swapper/300:38:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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