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2024-05-25 - 10:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 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 rackcslot7s.osadl.org (updated Sat May 25, 2024 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
88389524290,8sleep20-21swapper/219:05:262
95346021090,4sleep20-21swapper/222:05:302
886746991072,8cyclictest141rcu_preempt21:44:011
88674699998,6cyclictest26-21ksoftirqd/119:20:021
88674699965,6cyclictest231irq_work/119:28:321
88674699961,90cyclictest1005907-21cat00:35:231
88674699952,89cyclictest0-21swapper/123:40:031
8983662940,5sleep30-21swapper/319:30:393
886749999483,7cyclictest1-21systemd00:34:592
886749999482,8cyclictest859-21NetworkManager19:26:482
886746999486,5cyclictest0-21swapper/122:44:171
88674699943,7cyclictest0-21swapper/123:50:051
88674699942,88cyclictest0-21swapper/120:08:471
88674699942,88cyclictest0-21swapper/119:57:131
88674699942,88cyclictest0-21swapper/100:30:191
88674699942,88cyclictest0-21swapper/100:20:211
88674699942,88cyclictest0-21swapper/100:15:521
88674699942,20cyclictest1753-21gnome-shell23:35:271
886746999413,75cyclictest881251-21Softwar~cThread20:51:331
886749999382,7cyclictest945202-21taskset21:44:012
88674699932,88cyclictest0-21swapper/119:20:011
88674699932,87cyclictest0-21swapper/123:13:031
88674699932,87cyclictest0-21swapper/123:13:031
88674699932,87cyclictest0-21swapper/100:10:291
88674699932,7cyclictest0-21swapper/119:37:071
88674699932,7cyclictest0-21swapper/119:37:071
88674699932,6cyclictest0-21swapper/123:24:371
88674699932,6cyclictest0-21swapper/123:15:291
88674699932,6cyclictest0-21swapper/100:28:431
88674699932,6cyclictest0-21swapper/100:28:431
886746999284,5cyclictest0-21swapper/123:06:441
886746999284,5cyclictest0-21swapper/119:33:361
88674699922,88cyclictest0-21swapper/123:57:561
88674699922,87cyclictest0-21swapper/123:45:561
88674699922,86cyclictest0-21swapper/123:04:461
88674699922,86cyclictest0-21swapper/122:39:411
88674699922,6cyclictest0-21swapper/100:05:391
886746999211,38cyclictest881251-21Softwar~cThread20:34:101
88557929256,29sleep10-21swapper/119:08:241
886749999184,4cyclictest0-21swapper/223:56:332
886749999178,8cyclictest880726-21firefox23:11:582
886749999178,8cyclictest880726-21firefox23:11:582
88674999912,6cyclictest0-21swapper/219:22:592
886746999184,5cyclictest0-21swapper/123:34:251
886746999183,5cyclictest0-21swapper/119:50:351
88451629171,13sleep00-21swapper/019:05:410
886749999082,5cyclictest0-21swapper/222:42:522
886749999082,5cyclictest0-21swapper/200:10:262
88674999902,85cyclictest0-21swapper/219:19:332
886746999083,5cyclictest0-21swapper/120:01:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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