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2025-11-29 - 08:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Fri Nov 28, 2025 12:44:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2071821090,2chrt0-21swapper/310:08:563
2071821090,2chrt0-21swapper/310:08:563
172952880,2sleep20-21swapper/211:24:042
32432810,3sleep30-21swapper/309:23:463
32432810,3sleep30-21swapper/309:23:463
19012997440,32cyclictest0-21swapper/008:33:510
19012997440,32cyclictest0-21swapper/008:33:510
308362670,3sleep20-21swapper/211:59:062
308362670,3sleep20-21swapper/211:59:062
288562660,3sleep10-21swapper/110:29:041
288562660,3sleep10-21swapper/110:29:041
18992650,5chrt1896-21processes12:09:061
18992650,5chrt1896-21processes12:09:061
260652630,2chrt171ktimers/011:48:590
260652630,2chrt171ktimers/011:48:590
249272630,3sleep20-21swapper/208:53:582
19012996029,29cyclictest0-21swapper/011:13:520
19012996029,29cyclictest0-21swapper/011:13:520
10942600,3sleep30-21swapper/312:08:553
10942600,3sleep30-21swapper/312:08:553
132612590,3chrt0-21swapper/112:39:041
132612590,3chrt0-21swapper/112:39:041
107812590,3sleep20-21swapper/212:33:592
107812590,3sleep20-21swapper/212:33:592
81322580,2sleep30-21swapper/309:34:073
81322580,2sleep30-21swapper/309:34:073
242172570,3sleep20-21swapper/208:53:422
1901399574,47cyclictest146-21systemd-journal09:53:531
1901399574,47cyclictest146-21systemd-journal09:53:531
49442560,3sleep20-21swapper/212:18:512
49442560,3sleep20-21swapper/212:18:512
1901399553,42cyclictest480-21sshd09:43:521
157452550,3sleep20-21swapper/208:29:012
157452550,3sleep20-21swapper/208:29:012
1901399547,36cyclictest22443-21runrttasks10:13:531
1901399547,36cyclictest22443-21runrttasks10:13:531
297342520,3sleep30-21swapper/311:58:543
297342520,3sleep30-21swapper/311:58:543
266592510,4chrt0-21swapper/311:49:063
266592510,4chrt0-21swapper/311:49:063
1901399512,5cyclictest181rcu_preempt08:13:511
1901399512,5cyclictest181rcu_preempt08:13:511
119232500,2sleep20-21swapper/208:19:012
1901399487,6cyclictest181rcu_preempt10:23:501
1901399487,6cyclictest181rcu_preempt10:23:501
54512460,1chrt0-21swapper/112:18:581
54512460,1chrt0-21swapper/112:18:581
19012994622,17cyclictest171ktimers/008:53:530
3032450,3chrt0-21swapper/310:39:033
3032450,3chrt0-21swapper/310:39:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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