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2026-09-11 - 08:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Fri Sep 11, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
135592240165,23sleep10-21swapper/119:07:551
137002236162,24sleep20-21swapper/219:09:452
1332322120,10sleep339-21rcuc/319:05:383
124432200162,26sleep00-21swapper/019:05:200
13810998582,2cyclictest0-21swapper/221:46:312
13810997971,7cyclictest0-21swapper/220:23:532
13810997971,7cyclictest0-21swapper/220:23:532
15442540,4sleep230-21rcuc/222:20:142
258872530,3sleep230-21rcuc/219:35:122
149592530,3sleep214961-21missed_timers19:10:202
80562490,4sleep232-21ksoftirqd/220:05:262
1379499499,14cyclictest10353-21munin-run23:55:010
1379499482,13cyclictest23282-21idleruntime-cro19:30:010
1379499390,12cyclictest14782-21idleruntime-cro00:05:010
1379499380,12cyclictest19187-21perf00:15:010
13802993312,8cyclictest0-21swapper/121:39:161
25762320,4sleep081ktimersoftd/022:20:250
13810993229,2cyclictest0-21swapper/223:02:212
1379499312,13cyclictest19490-21munin-run20:35:010
1379499307,11cyclictest20747-21perf23:05:010
13814992918,2cyclictest827-21runrttasks00:29:263
316212280,16sleep10-21swapper/123:28:561
1381499281,18cyclictest0-21swapper/322:23:153
1380299281,19cyclictest4082-21latency_hist20:00:011
1379499280,13cyclictest10709-21perf20:15:010
1381499274,17cyclictest41-21ksoftirqd/321:48:103
1381499271,18cyclictest0-21swapper/322:49:503
1380299271,7cyclictest6911-21grep22:30:241
13802992712,13cyclictest12405-21kworker/u8:000:30:071
1380299271,17cyclictest10500-21fschecks_time22:40:151
1380299271,17cyclictest10500-21fschecks_time22:40:151
1380299271,17cyclictest0-21swapper/123:36:151
1380299271,16cyclictest0-21swapper/122:55:231
1379499274,11cyclictest1905-21perf19:55:000
13794992713,8cyclictest32375-21ntp_kernel_pll_22:15:190
1381499269,2cyclictest0-21swapper/323:02:223
1381499268,10cyclictest0-21swapper/321:31:513
1381499261,18cyclictest0-21swapper/322:02:453
13802992614,3cyclictest0-21swapper/120:12:461
1380299261,3cyclictest1897-21perf19:55:001
1380299261,17cyclictest0-21swapper/122:06:211
1380299261,11cyclictest20107-21munin-run21:50:011
1379499269,3cyclictest4995-21kworker/0:222:30:250
1379499261,13cyclictest4090-21munin-run20:00:010
13794992610,9cyclictest7301-21kworker/0:022:53:490
1381499252,15cyclictest0-21swapper/323:35:483
13814992514,3cyclictest0-21swapper/323:48:293
13814992514,3cyclictest0-21swapper/323:48:293
13814992514,3cyclictest0-21swapper/300:20:303
1381499251,18cyclictest0-21swapper/322:40:303
1381499251,18cyclictest0-21swapper/322:40:303
1381499251,18cyclictest0-21swapper/321:22:503
1381499251,17cyclictest0-21swapper/323:34:293
1381499251,16cyclictest0-21swapper/300:37:353
1381499250,16cyclictest0-21swapper/323:15:153
1380299251,6cyclictest0-21swapper/100:08:321
1380299251,5cyclictest0-21swapper/100:15:201
1380299251,21cyclictest9501-21expr21:25:121
1380299251,21cyclictest7094-21memory23:45:181
1380299251,21cyclictest7094-21memory23:45:181
1380299251,21cyclictest29261-21ntp_states00:35:231
1380299251,21cyclictest24473-21/usr/sbin/munin19:30:191
1380299251,21cyclictest24223-21ntp_states23:10:211
1380299251,16cyclictest0-21swapper/120:51:421
1380299251,15cyclictest0-21swapper/100:25:041
1380299251,12cyclictest18075-21fschecks_time20:30:151
1380299251,11cyclictest4798-21cat21:15:011
1380299251,11cyclictest30098-21cpu19:45:111
1380299251,11cyclictest12545-21munin-run00:00:011
1379499251,12cyclictest28293-21perf20:55:010
1381499241,17cyclictest0-21swapper/323:20:303
1381499241,17cyclictest0-21swapper/322:33:573
1381499241,16cyclictest0-21swapper/300:31:343
1380299247,10cyclictest0-21swapper/122:37:171
13802992417,3cyclictest14603-21grep19:10:161
1380299241,14cyclictest0-21swapper/123:54:171
1380299241,14cyclictest0-21swapper/123:17:091
1380299241,14cyclictest0-21swapper/120:19:401
1380299241,12cyclictest20777-21ntp_states20:35:211
1380299241,11cyclictest901-21latency_hist22:20:011
1380299241,11cyclictest4327-21/usr/sbin/munin23:40:131
1380299241,11cyclictest23472-21/usr/sbin/munin21:55:181
1380299241,11cyclictest16127-21irqstats20:25:181
1380299241,11cyclictest1206-21grep22:20:121
1380299241,11cyclictest0-21swapper/123:32:541
1380299240,14cyclictest0-21swapper/120:20:081
1380299240,14cyclictest0-21swapper/120:20:081
1379499246,15cyclictest21086-21awk19:25:010
1379499242,9cyclictest18385-21kworker/0:223:32:010
1379499242,10cyclictest31753-21kworker/0:019:49:010
1381499231,16cyclictest0-21swapper/321:40:023
1381499231,13cyclictest0-21swapper/300:09:083
1381499231,10cyclictest0-21swapper/323:25:253
1381099239,3cyclictest0-21swapper/200:27:152
13810992316,4cyclictest27956-21sh00:35:012
13810992312,3cyclictest87350irq/126-enp1s0-21:35:132
1380299239,3cyclictest6913-21latency_hist21:20:011
13802992313,2cyclictest0-21swapper/121:02:401
13802992312,3cyclictest0-21swapper/121:41:561
1380299231,15cyclictest0-21swapper/121:09:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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