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2026-07-24 - 12:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 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 rackcslot7s.osadl.org (updated Fri Jul 24, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
85165322670,9sleep10-21swapper/119:07:261
85078022500,9sleep30-21swapper/319:05:153
85088222300,15sleep234-21ksoftirqd/219:05:192
139099780,66rtkit-daemon0-21swapper/019:08:210
139099580,4rtkit-daemon1389-21rtkit-daemon20:46:152
9321082560,3sleep00-21swapper/022:55:140
9256552470,4sleep20-21swapper/222:35:192
139099460,4rtkit-daemon1389-21rtkit-daemon20:45:141
8664282410,3sleep10-21swapper/119:50:011
8807202370,4sleep13056-21PK-Backend20:30:111
9019622360,2sleep30-21swapper/321:30:123
139099320,2rtkit-daemon0-21swapper/119:40:491
139099310,2rtkit-daemon26-21ksoftirqd/119:19:121
139099280,4rtkit-daemon1389-21rtkit-daemon23:00:300
9324572270,6sleep1261ksoftirqd/122:55:191
8795972270,7sleep0131ksoftirqd/020:25:170
85197799270,24cyclictest1389-21rtkit-daemon20:45:140
139099270,4rtkit-daemon1389-21rtkit-daemon23:43:570
139099270,4rtkit-daemon1389-21rtkit-daemon00:04:450
851988992618,6cyclictest882165-21awk20:35:003
139099260,4rtkit-daemon1389-21rtkit-daemon23:55:011
139099260,4rtkit-daemon1389-21rtkit-daemon23:48:460
139099260,4rtkit-daemon1389-21rtkit-daemon23:31:071
139099260,4rtkit-daemon1389-21rtkit-daemon22:28:450
9525292250,4sleep33056-21PK-Backend23:54:593
139099250,4rtkit-daemon1389-21rtkit-daemon23:33:460
8700732230,2sleep30-21swapper/320:00:013
8700732230,2sleep30-21swapper/320:00:013
851988992318,3cyclictest866287-21dump-pmu-power19:50:003
851988992318,3cyclictest42-21ksoftirqd/322:21:413
851984992320,2cyclictest902148-21smartctl21:30:152
851984992320,2cyclictest0-21swapper/222:42:002
85198499230,22cyclictest889346-21latency_hist20:55:002
85197799230,21cyclictest945-21thermald19:53:290
139099230,4rtkit-daemon1389-21rtkit-daemon23:18:520
139099230,4rtkit-daemon1389-21rtkit-daemon23:06:210
139099230,4rtkit-daemon1389-21rtkit-daemon22:16:210
139099230,4rtkit-daemon1389-21rtkit-daemon20:01:200
139099230,4rtkit-daemon1389-21rtkit-daemon20:01:200
139099230,4rtkit-daemon1389-21rtkit-daemon19:57:190
139099230,4rtkit-daemon1389-21rtkit-daemon19:57:190
8523672220,2sleep20-21swapper/219:10:122
851988992220,1cyclictest3056-21PK-Backend20:43:073
851988992220,1cyclictest0-21swapper/322:59:143
851988992214,6cyclictest860204-21memory19:30:163
85198899220,20cyclictest3056-21PK-Backend23:32:193
851984992220,1cyclictest0-21swapper/223:41:352
851984992220,1cyclictest0-21swapper/221:36:232
851984992220,1cyclictest0-21swapper/221:24:062
851984992220,1cyclictest0-21swapper/220:02:552
851984992220,1cyclictest0-21swapper/220:02:552
851982992217,3cyclictest920807-21sh22:25:001
85198299220,20cyclictest901223-21chrt21:26:571
85198299220,20cyclictest3056-21PK-Backend20:19:451
851977992214,6cyclictest883-21dbus-daemon19:45:000
139099220,3rtkit-daemon1389-21rtkit-daemon22:30:550
139099220,15rtkit-daemon3056-21PK-Backend21:49:283
851988992119,1cyclictest3056-21PK-Backend21:21:473
851988992119,1cyclictest3056-21PK-Backend19:16:213
851988992119,1cyclictest0-21swapper/323:10:163
851988992119,1cyclictest0-21swapper/322:42:043
851988992119,1cyclictest0-21swapper/321:44:193
851988992119,1cyclictest0-21swapper/321:02:543
851988992119,1cyclictest0-21swapper/320:15:503
851988992119,1cyclictest0-21swapper/320:14:483
851988992119,1cyclictest0-21swapper/319:54:203
851988992119,1cyclictest0-21swapper/319:26:563
851988992119,1cyclictest0-21swapper/300:23:373
851988992118,2cyclictest3056-21PK-Backend23:55:383
851988992118,2cyclictest3056-21PK-Backend23:43:353
85198899210,20cyclictest3056-21PK-Backend00:11:063
85198899210,20cyclictest0-21swapper/321:10:453
85198899210,20cyclictest0-21swapper/319:21:073
85198899210,19cyclictest3056-21PK-Backend23:47:003
85198899210,19cyclictest3056-21PK-Backend19:12:223
85198499213,17cyclictest1095-21runrttasks21:09:322
851984992119,1cyclictest0-21swapper/223:55:412
851984992119,1cyclictest0-21swapper/223:46:012
851984992119,1cyclictest0-21swapper/223:24:522
851984992119,1cyclictest0-21swapper/223:12:492
851984992119,1cyclictest0-21swapper/222:27:132
851984992119,1cyclictest0-21swapper/221:52:392
851984992119,1cyclictest0-21swapper/221:45:432
851984992119,1cyclictest0-21swapper/221:25:422
851984992119,1cyclictest0-21swapper/221:17:242
851984992119,1cyclictest0-21swapper/219:41:052
851984992119,1cyclictest0-21swapper/200:35:502
851984992119,1cyclictest0-21swapper/200:25:072
85198499210,20cyclictest0-21swapper/223:53:522
85198499210,20cyclictest0-21swapper/222:58:222
85198499210,20cyclictest0-21swapper/221:05:002
85198499210,20cyclictest0-21swapper/219:52:472
85198499210,20cyclictest0-21swapper/219:49:092
85198499210,20cyclictest0-21swapper/200:12:242
85198499210,20cyclictest0-21swapper/200:06:572
85198499210,19cyclictest0-21swapper/219:15:572
851982992119,1cyclictest3056-21PK-Backend22:53:231
851982992119,1cyclictest3056-21PK-Backend22:53:231
851982992118,2cyclictest3056-21PK-Backend00:27:391
851982992112,7cyclictest950536-21apt-get23:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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