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2026-03-26 - 09:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack5slot4s.osadl.org (updated Thu Mar 26, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223174121120,6chrt0-21swapper/221:06:342
24155242860,5sleep20-21swapper/200:11:332
23475342700,2chrt75-21kworker/3:1-events23:01:363
2114374995940,16cyclictest280-21systemd-journal22:21:381
2114372995646,7cyclictest2180725-21latency_hist20:15:010
23874262510,2sleep3481ktimers/323:41:373
23571602480,4chrt0-21swapper/023:11:360
23688502450,5sleep20-21swapper/223:21:372
22663252440,5sleep375-21kworker/3:1-events21:41:343
21289292440,2sleep3471rcuc/319:21:373
2114374994435,7cyclictest2126774-21/usr/sbin/munin19:21:391
2114372994333,8cyclictest2166556-21diskstats20:01:310
2114372994234,6cyclictest2389648-21latency_hist23:45:010
23092212400,6sleep20-21swapper/222:21:422
2114374994031,7cyclictest280-21systemd-journal21:18:381
2114374993932,5cyclictest2176149-21apt-get20:11:261
2114376993832,4cyclictest2354246-21journal-offline23:07:312
2114372993829,7cyclictest2439873-21cpuspeed_turbos00:36:300
2114372993829,6cyclictest2190636-21latency_hist20:25:010
21138082384,10sleep10-21swapper/119:07:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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