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2026-08-04 - 14:20

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 Aug 04, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
989829682,9sleep00-21swapper/019:08:500
983029065,9sleep20-21swapper/219:07:562
967028864,13sleep10-21swapper/119:05:541
989128673,9sleep30-21swapper/319:08:443
275482490,0sleep10-21swapper/121:24:371
1006799320,21cyclictest0-21swapper/122:12:261
1006799310,3cyclictest15732-21sed00:10:251
1007299290,28cyclictest0-21swapper/223:54:152
1007299270,26cyclictest0-21swapper/221:15:322
1007299270,23cyclictest0-21swapper/200:35:082
1007299260,25cyclictest0-21swapper/222:36:292
1007299250,25cyclictest0-21swapper/221:26:532
1007299250,24cyclictest0-21swapper/223:11:592
1007799241,22cyclictest26178-21kworker/3:100:26:333
1007299240,24cyclictest0-21swapper/222:43:572
1007299240,23cyclictest0-21swapper/223:00:512
1007299230,22cyclictest0-21swapper/200:20:152
1007299230,21cyclictest0-21swapper/221:00:122
1007299230,1cyclictest0-21swapper/221:37:142
1006799230,22cyclictest0-21swapper/123:49:401
1006699230,17cyclictest0-21swapper/000:03:390
1006699220,1cyclictest0-21swapper/023:19:490
10042220,0sleep20-21swapper/222:06:102
320782210,0chrt0-21swapper/323:22:493
1007299210,17cyclictest0-21swapper/223:24:072
10077992015,2cyclictest39-21ksoftirqd/323:11:443
10072992019,1cyclictest0-21swapper/223:55:362
10072992019,1cyclictest0-21swapper/223:30:582
1006699200,20cyclictest0-21swapper/021:15:320
80952190,0sleep30-21swapper/322:30:093
10072991918,1cyclictest0-21swapper/222:24:302
10072991915,2cyclictest0-21swapper/223:17:532
1007299190,1cyclictest0-21swapper/222:01:212
1007299190,1cyclictest0-21swapper/222:01:202
1007299190,18cyclictest0-21swapper/221:46:072
1007299190,16cyclictest0-21swapper/223:27:202
1006799190,1cyclictest3100-21diskmemload00:00:561
1007299180,3cyclictest0-21swapper/222:48:512
1007299180,2cyclictest0-21swapper/223:47:102
1006699186,6cyclictest28377-21munin-run20:55:000
1006699181,9cyclictest1-21systemd00:19:540
1006699180,2cyclictest0-21swapper/022:18:040
1006699180,0cyclictest0-21swapper/000:35:080
1007799170,3cyclictest0-21swapper/321:30:143
1007799170,14cyclictest0-21swapper/300:24:073
10072991716,1cyclictest0-21swapper/222:57:012
1007299170,17cyclictest0-21swapper/223:38:252
10066991716,1cyclictest13-21ksoftirqd/023:33:580
1006699170,16cyclictest0-21swapper/021:37:140
1006699170,13cyclictest0-21swapper/021:00:110
327372160,3chrt25-21ksoftirqd/123:04:081
1007799160,16cyclictest0-21swapper/321:45:543
10072991614,1cyclictest9371-21ssh22:50:162
10072991611,4cyclictest31093-21kworker/u8:123:44:022
1007299160,12cyclictest0-21swapper/221:56:082
1006799160,1cyclictest0-21swapper/122:22:061
1006799160,14cyclictest0-21swapper/123:18:391
1006699166,7cyclictest9319-21ssh22:50:140
1006699160,11cyclictest0-21swapper/023:56:250
1007799156,3cyclictest225-21systemd-journal19:55:263
10072991511,3cyclictest32-21ksoftirqd/223:05:042
1007299150,15cyclictest0-21swapper/200:33:232
1007299150,13cyclictest0-21swapper/222:34:022
10067991513,2cyclictest0-21swapper/119:40:201
1006799151,14cyclictest3100-21diskmemload00:16:591
1006799150,1cyclictest0-21swapper/100:36:561
1006799150,15cyclictest0-21swapper/121:38:121
10066991514,1cyclictest0-21swapper/021:54:420
1006699151,1cyclictest141rcu_preempt23:05:270
10066991510,1cyclictest0-21swapper/022:24:010
1006699150,1cyclictest0-21swapper/021:46:350
1006699150,1cyclictest0-21swapper/000:24:540
1007799142,11cyclictest0-21swapper/300:00:213
10077991413,1cyclictest0-21swapper/320:21:493
10077991412,1cyclictest0-21swapper/323:05:003
10077991410,2cyclictest2939-21grep22:45:303
10077991410,2cyclictest26528-21tr20:50:163
1007299148,5cyclictest3100-21diskmemload22:17:332
1007299140,3cyclictest0-21swapper/221:11:122
1007299140,2cyclictest0-21swapper/200:25:462
1006799148,2cyclictest23118-21cut19:35:171
1006799142,10cyclictest0-21swapper/121:25:271
10067991412,1cyclictest12513-21sh22:51:241
10067991411,2cyclictest8412-21grep00:25:271
1006799141,12cyclictest21717-21fschecks_time23:55:181
10067991410,3cyclictest16213-21perf20:30:001
1006699147,2cyclictest225-21systemd-journal00:05:020
1006699144,8cyclictest823-21proc_pri19:55:220
1006699144,5cyclictest0-21swapper/021:55:240
1006699142,10cyclictest21140-21ssh21:40:140
1006699141,6cyclictest0-21swapper/022:10:140
10066991412,2cyclictest13-21ksoftirqd/022:31:050
1007799139,3cyclictest8627-21sed22:10:273
1007799139,3cyclictest22025-21sed21:20:283
1007799138,4cyclictest1051-21wc22:25:223
10077991310,2cyclictest30960-21sh23:41:093
10077991310,2cyclictest28301-21wc19:45:343
10077991310,2cyclictest2650-21sed21:05:263
10077991310,2cyclictest23101-21tail20:40:263
10077991310,2cyclictest17122-21ls22:55:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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