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2026-07-19 - 10:07

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 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 50 highest latencies:
System rackcslot7s.osadl.org (updated Sun Jul 19, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
220176222950,10sleep10-21swapper/119:05:231
227149621280,3sleep00-21swapper/022:25:010
228242021050,3sleep13056-21PK-Backend22:55:131
22019962970,15sleep013-21ksoftirqd/019:05:260
139099830,71rtkit-daemon0-21swapper/219:06:292
220240727839,13sleep30-21swapper/319:09:323
22774072600,2sleep33056-21PK-Backend22:40:163
22423542500,2sleep30-21swapper/321:00:153
22439232480,3sleep0161rcuc/021:05:130
2202626992817,7cyclictest1095-21runrttasks20:30:201
22733082250,3sleep3411rcuc/322:30:013
220262999241,4cyclictest1095-21runrttasks23:17:282
2202626992412,9cyclictest2211922-21anacron19:34:461
2202622992417,5cyclictest2252080-21cron21:30:000
220263499232,17cyclictest2213703-21munin-plugin-st19:40:003
2202629992315,6cyclictest436-20systemd-journal22:30:002
220262999230,21cyclictest0-21swapper/221:45:212
220262999230,21cyclictest0-21swapper/221:45:212
2202626992313,8cyclictest2299397-21cron23:45:001
2202626992313,8cyclictest2299397-21cron23:45:001
220262299230,22cyclictest3056-21PK-Backend22:56:520
2202634992220,1cyclictest3056-21PK-Backend20:28:313
2202634992213,7cyclictest436-20systemd-journal23:00:003
2202634992213,6cyclictest2255543-21cron21:39:593
220263499220,3cyclictest2291332-21memory23:20:193
2202629992216,4cyclictest2287007-21sh23:10:002
2202626992215,4cyclictest2310286-21cstates00:15:121
2202626992213,6cyclictest436-20systemd-journal22:15:001
2202622992220,1cyclictest0-21swapper/023:05:100
2202622992220,1cyclictest0-21swapper/020:55:380
2202622992220,1cyclictest0-21swapper/000:34:120
2202622992219,2cyclictest0-21swapper/023:49:240
2202622992214,6cyclictest2309221-21python300:10:210
220262299221,20cyclictest2250369-21perf21:25:010
220262299220,20cyclictest3056-21PK-Backend22:30:220
139099220,14rtkit-daemon0-21swapper/200:14:252
2202634992119,1cyclictest3056-21PK-Backend22:50:043
2202634992119,1cyclictest3056-21PK-Backend00:16:233
2202634992119,1cyclictest0-21swapper/322:30:583
2202634992119,1cyclictest0-21swapper/322:17:123
2202634992119,1cyclictest0-21swapper/321:28:333
2202634992119,1cyclictest0-21swapper/320:55:283
220263499211,8cyclictest2245907-21/usr/sbin/munin21:10:173
2202634992118,2cyclictest3056-21PK-Backend00:32:383
2202634992118,2cyclictest3056-21PK-Backend00:27:183
220263499211,19cyclictest42-21ksoftirqd/321:17:103
220263499210,20cyclictest0-21swapper/320:37:223
220263499210,19cyclictest3056-21PK-Backend20:40:463
2202629992119,1cyclictest0-21swapper/220:54:042
2202629992113,6cyclictest883-21dbus-daemon00:35:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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