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2026-06-28 - 03:55

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sun Jun 28, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1478029281,6sleep20-21swapper/219:05:232
1566528977,8sleep00-21swapper/019:09:040
1557928878,6sleep10-21swapper/119:07:551
1564828471,9sleep30-21swapper/319:08:503
169132550,2sleep116902-21apt-get23:30:141
1583199280,27cyclictest0-21swapper/222:00:352
1583699242,21cyclictest1142-21runrttasks23:03:053
1583199240,23cyclictest0-21swapper/222:50:362
1583199232,5cyclictest2470-21fschecks_count21:25:182
15831992221,1cyclictest0-21swapper/200:05:142
1583699200,0cyclictest0-21swapper/323:42:243
1582899201,18cyclictest9978-21expr23:45:161
1583199190,19cyclictest0-21swapper/223:32:462
15828991914,3cyclictest15820-21cyclictest00:03:451
15826991915,2cyclictest13-21ksoftirqd/023:00:010
15836991815,2cyclictest39-21ksoftirqd/300:02:243
1583699180,14cyclictest0-21swapper/300:37:433
1583699180,14cyclictest0-21swapper/300:37:423
1582899182,16cyclictest2305-21awk19:45:261
1582899181,1cyclictest4148-21ssh22:05:141
15826991817,1cyclictest0-21swapper/023:52:560
15836991715,1cyclictest0-21swapper/323:55:163
1583199170,2cyclictest0-21swapper/221:55:332
1582899179,1cyclictest8622-21diskmemload22:23:521
1582899170,9cyclictest0-21swapper/123:10:131
1582899170,0cyclictest0-21swapper/100:19:471
1582699175,6cyclictest10023-21awk00:05:000
1582699173,4cyclictest225-21systemd-journal21:29:230
15826991716,1cyclictest0-21swapper/022:25:050
1583699164,1cyclictest24323-21apt-get23:15:133
1583199162,1cyclictest141rcu_preempt00:23:222
15831991615,1cyclictest0-21swapper/200:33:032
15831991610,5cyclictest5093-21wc21:00:192
1583199160,4cyclictest0-21swapper/221:45:132
1583199160,15cyclictest19591-21/usr/sbin/munin20:25:142
1583199160,0cyclictest0-21swapper/222:36:262
1582899163,7cyclictest28264-21aten2_r7power_p19:35:141
15826991615,1cyclictest0-21swapper/022:09:310
15826991613,2cyclictest13-21ksoftirqd/000:11:230
1583699159,5cyclictest4945-21tr22:05:183
15836991511,2cyclictest26140-21ssh21:20:153
15836991511,2cyclictest19949-21wc19:15:263
1583699150,15cyclictest0-21swapper/321:45:253
1583199154,7cyclictest30317-21/usr/sbin/munin22:40:162
1583199151,1cyclictest141rcu_preempt23:40:202
1583199150,1cyclictest0-21swapper/200:18:072
15828991511,3cyclictest15736-21kworker/1:221:40:151
1583699141,13cyclictest0-21swapper/320:00:113
15836991411,2cyclictest5434-21tr22:25:153
15836991411,2cyclictest28819-21cut19:35:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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