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2026-04-30 - 08:52

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 Wed Apr 29, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
569621170,0sleep10-21swapper/112:35:011
2376229561,30sleep20-21swapper/207:08:452
2357229250,38sleep00-21swapper/007:06:180
2355328768,15sleep10-21swapper/107:06:031
2373628469,9sleep30-21swapper/307:08:263
23945993027,2cyclictest25-21ksoftirqd/110:20:001
23945993027,2cyclictest25-21ksoftirqd/110:20:001
2394399287,20cyclictest1142-21runrttasks10:56:280
2394399275,2cyclictest7470-21apache_processe11:00:110
23950992625,1cyclictest0-21swapper/211:07:572
23953992519,1cyclictest0-21swapper/309:30:433
23953992519,1cyclictest0-21swapper/309:27:493
2394599242,1cyclictest16749-21diskmemload10:49:521
23953992318,1cyclictest0-21swapper/309:22:563
2395399230,2cyclictest0-21swapper/309:18:553
2394599230,0cyclictest0-21swapper/111:45:341
2394399230,4cyclictest0-21swapper/011:38:500
2394599220,1cyclictest0-21swapper/109:24:221
2394399226,10cyclictest13889-21munin-run12:40:010
2394399221,5cyclictest22498-21head12:25:190
2394599210,1cyclictest0-21swapper/111:35:521
2394599210,19cyclictest0-21swapper/108:00:191
2394399213,4cyclictest0-21swapper/012:07:590
2395099200,1cyclictest0-21swapper/212:16:292
2394599200,2cyclictest0-21swapper/109:31:171
2394399200,1cyclictest0-21swapper/011:22:290
2395399192,15cyclictest16749-21diskmemload11:36:343
2395099194,2cyclictest141rcu_preempt10:07:372
23950991917,1cyclictest0-21swapper/209:58:592
23945991919,0cyclictest0-21swapper/110:27:281
2394399194,4cyclictest15859-21awk09:05:210
23950991816,1cyclictest0-21swapper/212:10:162
2395099180,18cyclictest0-21swapper/211:18:402
2395099180,0cyclictest0-21swapper/210:24:542
23945991813,4cyclictest0-21swapper/112:20:131
2394599180,17cyclictest0-21swapper/109:17:521
2394399188,10cyclictest13-21ksoftirqd/010:33:490
2394399180,3cyclictest0-21swapper/008:15:130
2394399180,2cyclictest0-21swapper/010:23:000
2394399180,16cyclictest0-21swapper/007:25:180
2394599175,7cyclictest1079-21apt-get07:30:001
23945991715,1cyclictest0-21swapper/112:11:081
23945991710,6cyclictest26607-21head11:30:161
2394599170,3cyclictest0-21swapper/111:14:371
2394399176,2cyclictest26276-21cron09:35:000
315902160,0sleep30-21swapper/307:25:163
269992160,0sleep30-21swapper/309:54:423
2395399160,1cyclictest0-21swapper/309:39:343
23950991615,1cyclictest0-21swapper/211:46:522
23950991614,1cyclictest23010-21pmu-power12:25:242
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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