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2026-08-12 - 06:01
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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 rackeslot6.osadl.org (updated Wed Aug 12, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
338816599154143,8cyclictest1213033-21systemd-journal22:50:001
338816599154143,8cyclictest1213033-21systemd-journal22:50:001
338816599136123,9cyclictest1213033-21systemd-journal19:25:001
338816399132121,9cyclictest1213033-21systemd-journal21:35:000
338816399131114,5cyclictest3447476-21kworker/u8:0+events_unbound22:20:000
338816399130124,5cyclictest3477177-21kworker/u8:2+flush-179:023:50:000
338816399129122,4cyclictest3405857-21kworker/u8:3+flush-179:020:35:020
338816399128117,9cyclictest3428344-21apt-get21:11:440
338816399127118,6cyclictest3477177-21kworker/u8:2+events_unbound23:55:160
338816399127117,7cyclictest3436349-21latency_hist21:40:010
338816599126113,11cyclictest1213033-21systemd-journal23:35:001
338816599125115,7cyclictest3467373-21latency_hist23:15:001
338816399125115,7cyclictest3418804-21latency_hist20:45:010
338816599124114,7cyclictest3494774-21latency_hist00:40:011
338816599123113,6cyclictest1213033-21systemd-journal00:10:011
338816399119115,3cyclictest3394704-21kworker/u8:3+flush-179:019:50:220
338816399119106,10cyclictest1213033-21systemd-journal22:55:000
338816399118108,7cyclictest3440348-21kworker/u8:2+flush-179:022:10:140
338816399117109,5cyclictest3449146-21kworker/u8:3+events_unbound22:25:240
338816399117107,7cyclictest3440348-21kworker/u8:2+flush-179:022:05:210
338816399116111,4cyclictest3457349-21kworker/u8:3+events_unbound22:45:000
338816399116109,5cyclictest3412213-21kworker/u8:0+events_unbound20:50:000
338816599115104,8cyclictest1213033-21systemd-journal23:40:001
338816399115109,4cyclictest3456781-21kworker/u8:1+events_unbound22:45:240
338816399115109,4cyclictest3456781-21kworker/u8:1+events_unbound22:45:230
338816399115105,7cyclictest3399447-21latency_hist19:45:000
338816399114107,6cyclictest3420965-21kworker/u8:2+events_unbound20:55:230
338816399114105,6cyclictest3436327-21kworker/u8:1+flush-179:021:45:200
338816399113107,4cyclictest3457349-21kworker/u8:3+events_unbound23:10:000
338816399112103,6cyclictest3420965-21kworker/u8:2+events_unbound21:00:180
338816399112102,7cyclictest3462316-21kworker/u8:2+events_unbound23:10:220
338816399112102,7cyclictest3449111-21kworker/u8:2+events_unbound22:35:220
338816399112100,8cyclictest3467280-21kworker/u8:0+events_unbound23:35:140
338816399111105,4cyclictest3388059-21kworker/u8:1+flush-179:019:10:180
338816399111105,4cyclictest3388059-21kworker/u8:1+flush-179:019:10:180
338816399110104,5cyclictest3457349-21kworker/u8:3+events_unbound22:55:240
33881639910999,7cyclictest3436327-21kworker/u8:1+events_unbound21:50:220
338816399109101,5cyclictest3388059-21kworker/u8:1+events_unbound19:15:210
338816399108100,5cyclictest3436327-21kworker/u8:1+flush-179:021:55:150
33881639910799,6cyclictest3462316-21kworker/u8:2+flush-179:023:20:200
33881659910696,7cyclictest3457349-21kworker/u8:3+flush-179:023:00:131
33881639910696,7cyclictest3486797-21latency_hist00:15:010
33881659910596,6cyclictest3420388-21latency_hist20:50:011
33881639910599,4cyclictest3412213-21kworker/u8:0+flush-179:020:25:150
33881639910599,4cyclictest3404925-21kworker/u8:2+flush-179:020:10:250
33881639910590,6cyclictest3480608-21kworker/u8:0+flush-179:000:15:210
33881639910498,5cyclictest3477177-21kworker/u8:2+events_unbound00:05:270
33881639910497,5cyclictest3489469-21kworker/u8:2+flush-179:000:30:200
33881639910395,6cyclictest3434740-21kworker/u8:0+events_unbound21:40:240
33881659910292,8cyclictest3426991-21/usr/sbin/munin21:10:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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