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2025-11-23 - 23:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Sun Nov 23, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
399199924,81cyclictest0-21swapper/011:38:170
399599894,11cyclictest0-21swapper/307:03:293
399199894,77cyclictest0-21swapper/011:23:140
399199894,68cyclictest0-21swapper/008:37:480
3995998824,10cyclictest2300-21unixbench_singl07:58:253
399199883,10cyclictest0-21swapper/011:32:560
3991998815,66cyclictest28064-21tail12:17:550
399599874,32cyclictest0-21swapper/308:08:023
3995998728,10cyclictest16692-21fschecks_time11:53:003
3995998728,10cyclictest16692-21fschecks_time11:53:003
3995998723,10cyclictest31190-21gltestperf12:23:003
399599864,13cyclictest0-21swapper/308:07:493
399599863,34cyclictest0-21swapper/308:24:483
3995998624,9cyclictest19720-21aten_r1power_fr10:52:563
399199863,9cyclictest17196-21cat07:23:140
399199863,76cyclictest0-21swapper/009:02:420
399199863,76cyclictest0-21swapper/009:02:420
3991998611,50cyclictest20885-21sshd12:02:540
3995998528,10cyclictest28096-21aten_r1power_cu07:48:013
3995998525,11cyclictest2093-21grep10:13:193
3995998427,10cyclictest26751-21tail12:13:033
3995998424,10cyclictest23810-21unixbench_singl08:43:223
399199844,72cyclictest0-21swapper/010:53:130
399199844,12cyclictest0-21swapper/007:13:130
399599834,11cyclictest0-21swapper/309:31:553
3995998330,11cyclictest19038-21grep08:33:243
399599833,27cyclictest0-21swapper/309:33:073
399199834,13cyclictest0-21swapper/008:47:480
399199834,12cyclictest0-21swapper/010:22:590
399199834,12cyclictest0-21swapper/010:22:590
3991998312,50cyclictest0-21swapper/009:13:020
243799830,5rtkit-daemon2436-21rtkit-daemon09:43:381
243799830,5rtkit-daemon2436-21rtkit-daemon09:43:381
399599824,24cyclictest0-21swapper/307:38:043
399599824,12cyclictest0-21swapper/309:08:063
399599823,36cyclictest0-21swapper/308:53:163
399599823,36cyclictest0-21swapper/308:53:163
399199829,56cyclictest0-21swapper/010:27:570
399199824,71cyclictest0-21swapper/007:48:100
399199824,13cyclictest0-21swapper/012:12:570
399199823,12cyclictest0-21swapper/011:18:160
399199823,10cyclictest0-21swapper/007:56:450
3991998216,48cyclictest0-21swapper/007:28:220
3991998216,48cyclictest0-21swapper/007:28:220
3991998214,9cyclictest4057-21munin-node11:28:070
399599813,32cyclictest0-21swapper/310:40:173
3995998124,10cyclictest21769-21gltestperf07:33:113
399199816,55cyclictest0-21swapper/010:52:130
399199815,57cyclictest0-21swapper/009:26:590
399199814,65cyclictest0-21swapper/008:03:080
399199814,62cyclictest0-21swapper/012:02:420
399199814,58cyclictest0-21swapper/010:13:030
399199814,54cyclictest0-21swapper/010:07:050
399199814,13cyclictest0-21swapper/008:48:480
399199814,12cyclictest0-21swapper/009:33:080
399199814,11cyclictest0-21swapper/008:13:020
399199814,11cyclictest0-21swapper/008:13:020
399199813,8cyclictest12994-21unixbench_multi09:28:190
399199813,71cyclictest149091munin-node08:28:160
399199813,10cyclictest0-21swapper/011:07:550
399199813,10cyclictest0-21swapper/011:07:550
3991998118,45cyclictest0-21swapper/009:53:540
3991998113,47cyclictest0-21swapper/011:43:540
243799810,5rtkit-daemon2436-21rtkit-daemon10:28:361
243799810,5rtkit-daemon2436-21rtkit-daemon08:24:341
399599804,22cyclictest0-21swapper/310:22:573
399599804,22cyclictest0-21swapper/310:22:573
399599803,32cyclictest0-21swapper/310:51:573
3995998021,14cyclictest13805-21cut07:18:033
399199806,55cyclictest29253-1kworker/0:2H10:43:340
399199805,68cyclictest0-21swapper/011:12:540
399199804,58cyclictest0-21swapper/007:03:150
399199804,56cyclictest0-21swapper/009:38:190
399199804,14cyclictest0-21swapper/008:23:170
399199804,12cyclictest0-21swapper/011:47:550
399199804,12cyclictest0-21swapper/008:53:130
399199804,12cyclictest0-21swapper/008:53:130
399199803,61cyclictest11951-1kworker/0:0H08:22:490
399199803,59cyclictest12215-21latency_hist10:37:450
399199803,54cyclictest0-21swapper/010:58:040
243799800,6rtkit-daemon2436-21rtkit-daemon09:48:081
243799800,5rtkit-daemon2436-21rtkit-daemon12:07:331
243799800,5rtkit-daemon2436-21rtkit-daemon11:25:421
243799800,5rtkit-daemon2436-21rtkit-daemon11:21:421
243799800,5rtkit-daemon2436-21rtkit-daemon09:18:471
243799800,4rtkit-daemon2436-21rtkit-daemon11:41:191
243799800,4rtkit-daemon2436-21rtkit-daemon11:11:501
243799800,4rtkit-daemon2436-21rtkit-daemon11:11:501
243799800,4rtkit-daemon2436-21rtkit-daemon11:00:131
243799800,4rtkit-daemon2436-21rtkit-daemon09:04:471
243799800,4rtkit-daemon2436-21rtkit-daemon07:56:501
399599794,32cyclictest0-21swapper/307:32:523
399599794,32cyclictest0-21swapper/307:32:523
3995997924,10cyclictest28814-21gltestperf12:18:023
399199794,58cyclictest0-21swapper/009:43:090
399199794,58cyclictest0-21swapper/009:43:090
243799790,5rtkit-daemon2436-21rtkit-daemon11:34:561
243799790,5rtkit-daemon2436-21rtkit-daemon10:43:511
243799790,4rtkit-daemon2436-21rtkit-daemon12:19:401
243799790,4rtkit-daemon2436-21rtkit-daemon12:09:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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