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2026-04-09 - 03:13

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 Thu Apr 09, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19049210491,9sleep20-21swapper/219:05:552
1723729381,8sleep00-21swapper/019:05:090
1806928571,9sleep10-21swapper/119:05:181
1891128067,9sleep30-21swapper/319:05:293
1950899261,21cyclictest0-21swapper/121:35:101
19514992521,2cyclictest39-21ksoftirqd/322:10:473
1950899250,3cyclictest0-21swapper/122:48:171
1950899240,23cyclictest0-21swapper/100:37:441
1950899240,1cyclictest0-21swapper/122:06:251
248992230,0sleep10-21swapper/122:15:031
19514992321,2cyclictest39-21ksoftirqd/321:37:173
123942230,1sleep125-21ksoftirqd/122:26:051
1951499221,6cyclictest39-21ksoftirqd/300:17:443
1951499221,20cyclictest0-21swapper/300:29:103
1951499220,1cyclictest0-21swapper/322:35:133
1950899223,2cyclictest11106-21sed21:05:201
19508992212,6cyclictest38150irq/131-snd_hda21:50:131
1950899221,20cyclictest0-21swapper/121:55:131
1951499212,3cyclictest381rcuc/322:30:223
1951499210,5cyclictest39-21ksoftirqd/323:01:243
1950499211,1cyclictest0-21swapper/022:06:170
1951499207,12cyclictest8749-21tail00:00:163
1951499204,6cyclictest141rcu_preempt22:54:273
19514992019,1cyclictest12035-21diskmemload21:51:543
1951499200,19cyclictest0-21swapper/300:24:423
1950899200,2cyclictest0-21swapper/123:09:491
1950899200,0cyclictest0-21swapper/122:59:431
1950499207,6cyclictest4995-21munin-run21:25:000
19514991916,2cyclictest0-21swapper/300:35:173
1951499190,2cyclictest0-21swapper/322:42:233
1951099198,5cyclictest12185-21apt-get23:05:122
1951099190,18cyclictest0-21swapper/223:33:052
1951099190,18cyclictest0-21swapper/222:22:042
19508991917,1cyclictest30411-21/usr/sbin/munin20:40:211
19508991917,1cyclictest0-21swapper/120:55:131
1950899190,1cyclictest0-21swapper/123:57:081
1950499190,18cyclictest0-21swapper/023:00:150
19514991817,1cyclictest0-21swapper/321:29:063
1950899180,1cyclictest0-21swapper/121:18:101
94882170,1sleep10-21swapper/100:00:231
1951499175,5cyclictest39-21ksoftirqd/322:05:453
19514991716,1cyclictest39-21ksoftirqd/321:49:343
19514991715,1cyclictest26471-21apt-get00:30:143
1951099170,15cyclictest0-21swapper/223:35:292
1951099170,15cyclictest0-21swapper/200:27:332
19508991712,3cyclictest6034-21sh23:40:001
1950899170,1cyclictest0-21swapper/121:10:261
1951499167,3cyclictest39-21ksoftirqd/323:52:453
1951499166,10cyclictest39-21ksoftirqd/300:13:263
1951499163,1cyclictest141rcu_preempt22:02:203
19514991615,1cyclictest0-21swapper/322:20:453
19514991614,1cyclictest0-21swapper/321:33:113
19510991613,2cyclictest0-21swapper/222:53:422
1951099160,2cyclictest0-21swapper/221:56:552
1951099160,16cyclictest0-21swapper/221:28:562
19508991614,2cyclictest12035-21diskmemload00:30:271
1950499164,6cyclictest12035-21diskmemload00:20:110
1950499162,9cyclictest25169-21wget22:15:130
19504991614,1cyclictest12035-21diskmemload21:42:350
19514991513,1cyclictest29004-21apt-get23:15:113
1951499150,2cyclictest0-21swapper/321:11:563
1951499150,14cyclictest0-21swapper/322:26:343
1951099158,7cyclictest55650irq/127-enp2s0-23:55:062
19508991514,1cyclictest0-21swapper/119:25:111
1950899150,1cyclictest0-21swapper/123:30:161
1950899150,15cyclictest0-21swapper/123:00:421
1950899150,0cyclictest0-21swapper/120:49:521
1950499151,8cyclictest0-21swapper/022:55:210
1950499151,7cyclictest27789-21munin-run20:35:000
1950499150,1cyclictest0-21swapper/022:29:490
1950499150,13cyclictest26998-21grep00:10:250
1951499148,5cyclictest381rcuc/320:45:143
1951499147,5cyclictest12035-21diskmemload23:37:253
1951499145,1cyclictest17095-21ssh23:45:293
19514991413,1cyclictest12035-21diskmemload21:56:203
19514991412,2cyclictest39-21ksoftirqd/322:18:403
19514991412,2cyclictest0-21swapper/300:00:003
1951499141,11cyclictest381rcuc/323:40:113
1951499141,11cyclictest381rcuc/323:40:113
1951499140,3cyclictest0-21swapper/322:57:093
1951499140,2cyclictest0-21swapper/321:22:153
1951099149,4cyclictest6703-21/usr/sbin/munin21:45:212
1951099146,7cyclictest4298-21sh22:02:202
1951099142,12cyclictest29529-21kworker/u8:122:57:052
19510991412,2cyclictest32-21ksoftirqd/200:02:462
19510991410,3cyclictest7241-21cron21:00:002
19510991410,3cyclictest5376-21tr23:20:152
1950899148,5cyclictest2691-21cut22:40:131
1950899146,4cyclictest12975-21munin-run23:25:001
1950899143,4cyclictest225-21systemd-journal00:17:371
1950899143,1cyclictest141rcu_preempt21:43:381
19508991410,2cyclictest13999-21grep21:30:131
1950899140,14cyclictest0-21swapper/122:38:471
1950899140,13cyclictest0-21swapper/122:12:111
1950499145,5cyclictest225-21systemd-journal20:15:000
1950499143,5cyclictest0-21swapper/000:39:070
19504991411,2cyclictest1748-21cut00:15:150
1950499140,12cyclictest26579-21tr22:35:140
45612130,1sleep232-21ksoftirqd/221:43:422
1951499138,1cyclictest0-21swapper/320:05:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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