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2026-04-28 - 13:17

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 Tue Apr 28, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3018421200,0sleep20-21swapper/221:54:042
2789828762,9sleep30-21swapper/319:08:373
2784728674,8sleep00-21swapper/019:07:580
2769328560,9sleep20-21swapper/219:05:592
2786327962,13sleep10-21swapper/119:08:111
28101992720,5cyclictest21966-21kworker/3:222:23:333
28091992726,1cyclictest0-21swapper/022:55:460
2810199250,1cyclictest0-21swapper/300:15:553
2809399250,24cyclictest0-21swapper/123:57:401
81212240,0sleep20-21swapper/222:19:402
2810199240,23cyclictest21966-21kworker/3:223:08:433
2810199230,23cyclictest0-21swapper/322:56:213
2810199230,22cyclictest21966-21kworker/3:200:04:533
2809399230,0cyclictest0-21swapper/122:27:131
48012220,0sleep30-21swapper/321:57:553
28096992221,1cyclictest32-21ksoftirqd/223:17:362
285932210,2chrt311rcuc/222:50:262
2810199200,2cyclictest0-21swapper/300:08:073
2810199200,19cyclictest0-21swapper/321:15:163
2809699203,4cyclictest0-21swapper/221:36:272
2809699200,19cyclictest0-21swapper/222:05:582
2809399207,6cyclictest7235-21munin-node00:25:581
28093992015,4cyclictest38150irq/131-snd_hda00:05:331
2809399200,2cyclictest0-21swapper/121:27:541
28101991913,5cyclictest39-21ksoftirqd/323:46:373
2810199190,0cyclictest32220-21ntpq21:35:213
2809699190,19cyclictest0-21swapper/221:20:242
2809699190,16cyclictest0-21swapper/200:05:062
2809399190,2cyclictest0-21swapper/122:55:281
2809399190,1cyclictest0-21swapper/122:23:081
2809399190,19cyclictest0-21swapper/123:22:281
2810199182,3cyclictest13071-21kworker/u8:321:44:043
2809699188,3cyclictest0-21swapper/221:40:182
28096991817,1cyclictest0-21swapper/219:14:092
28093991817,1cyclictest0-21swapper/121:41:551
2809399180,18cyclictest0-21swapper/121:58:101
2809399180,18cyclictest0-21swapper/100:18:511
2809199180,17cyclictest0-21swapper/023:27:280
2809699173,6cyclictest21147-21diskmemload23:00:002
28093991717,0cyclictest0-21swapper/121:19:341
2809399171,13cyclictest0-21swapper/123:45:151
2809399170,16cyclictest0-21swapper/121:50:081
2809199177,5cyclictest0-21swapper/020:05:010
28101991616,0cyclictest0-21swapper/323:56:593
28101991614,2cyclictest39-21ksoftirqd/323:13:223
28101991614,2cyclictest0-21swapper/322:17:123
2810199160,2cyclictest0-21swapper/321:34:243
28096991614,1cyclictest16934-21munin-run22:25:002
28093991612,3cyclictest21147-21diskmemload00:36:271
2809399160,2cyclictest0-21swapper/122:51:401
2809399160,1cyclictest0-21swapper/100:04:341
2809199164,10cyclictest26827-31find00:07:540
28091991614,1cyclictest0-21swapper/023:33:420
28091991612,2cyclictest0-21swapper/023:37:580
2810199157,7cyclictest487-21avahi-daemon21:00:193
2810199150,13cyclictest0-21swapper/320:05:143
2809699153,1cyclictest0-21swapper/200:30:062
28093991510,1cyclictest21760-21wc23:05:271
2809399150,15cyclictest0-21swapper/123:17:471
2809399150,0cyclictest0-21swapper/100:13:151
28091991512,2cyclictest13-21ksoftirqd/022:53:070
2809199150,15cyclictest0-21swapper/023:15:420
68042140,0chrt0-21swapper/121:20:171
28101991412,1cyclictest26799-21kworker/3:100:10:543
28101991411,2cyclictest21125-21grep20:00:203
2809699149,4cyclictest20779-21taskset00:22:312
28096991413,1cyclictest0-21swapper/222:25:232
28096991411,2cyclictest14755-21sh23:20:332
2809699140,3cyclictest0-21swapper/221:47:102
2809699140,1cyclictest0-21swapper/222:11:402
2809399144,4cyclictest452-21systemd-logind19:35:221
28093991411,2cyclictest5750-21cut19:30:131
28093991410,3cyclictest11274-21wc22:40:201
28093991410,2cyclictest24912-21grep20:10:151
2809399140,14cyclictest0-21swapper/121:10:151
2809399140,13cyclictest28494-21basename23:10:141
2809199149,3cyclictest5702-21tr20:35:210
2809199149,3cyclictest2218-21wc19:20:220
2809199148,4cyclictest31566-21apt-config21:55:000
2809199148,4cyclictest21147-21diskmemload00:20:230
2809199146,7cyclictest27427-21sensors_fan22:30:240
2809199141,7cyclictest8974-21idleruntime-cro20:45:010
28091991413,1cyclictest13-21ksoftirqd/023:48:450
28091991410,2cyclictest13877-21tail19:45:200
2809199140,13cyclictest32215-21wc23:50:260
97032130,0sleep00-21swapper/021:21:540
2810199139,3cyclictest5130-21sed23:15:183
2810199139,3cyclictest14014-21grep23:20:223
28101991310,2cyclictest25524-21cat22:30:003
28101991310,2cyclictest23909-21tr21:50:153
28101991310,2cyclictest10212-21sed20:45:183
2810199130,1cyclictest0-21swapper/322:00:083
2809699133,5cyclictest225-21systemd-journal00:17:332
28096991310,2cyclictest32431-21grep20:25:162
28096991310,2cyclictest30095-21grep23:30:152
28096991310,2cyclictest20255-21grep20:00:152
2809699130,1cyclictest0-21swapper/221:31:092
2809699130,1cyclictest0-21swapper/200:14:562
2809399139,3cyclictest6572-21cron20:40:001
2809399139,3cyclictest13959-21tr23:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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