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2024-04-18 - 09:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Thu Apr 18, 2024 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19253991076,38cyclictest0-21swapper/119:31:001
19253999438,13cyclictest0-21swapper/118:41:271
260472930,4sleep2281ktimersoftd/219:51:132
1925199838,21cyclictest0-21swapper/019:45:590
1925199838,21cyclictest0-21swapper/019:45:590
1925399727,42cyclictest0-21swapper/118:36:011
19256997110,51cyclictest0-21swapper/322:36:153
254422633,53sleep00-21swapper/021:56:190
242299630,4rtkit-daemon2421-21rtkit-daemon18:07:392
242299620,4rtkit-daemon2421-21rtkit-daemon22:39:132
162932623,9sleep316426-21cpuspeed_turbos20:36:103
242299610,4rtkit-daemon2421-21rtkit-daemon18:29:302
19251996124,16cyclictest1286-21runrttasks19:15:550
242299600,5rtkit-daemon2421-21rtkit-daemon21:37:152
242299600,4rtkit-daemon2421-21rtkit-daemon21:02:022
242299600,4rtkit-daemon2421-21rtkit-daemon18:56:372
242299600,4rtkit-daemon2421-21rtkit-daemon18:56:372
1925699604,10cyclictest0-21swapper/319:06:013
1925599605,39cyclictest0-21swapper/217:36:272
19255996020,25cyclictest13087-21aten2.4-expect19:26:112
208662592,49sleep20-21swapper/220:45:032
19255995928,12cyclictest0-21swapper/222:11:262
19255995920,15cyclictest0-21swapper/222:25:532
19251995940,12cyclictest18559-21grep21:41:310
112632593,12sleep00-21swapper/020:26:110
19255995835,13cyclictest0-21swapper/221:25:552
19255995835,13cyclictest0-21swapper/221:25:552
40502573,9sleep00-21swapper/022:16:310
229072573,47sleep222928-21grep22:56:072
40712552,46sleep14113-21latency19:06:231
242299550,5rtkit-daemon2421-21rtkit-daemon22:15:513
194732554,44sleep00-21swapper/020:41:190
1925599554,13cyclictest0-21swapper/220:46:312
1925599554,12cyclictest0-21swapper/221:31:162
19253995540,10cyclictest0-21swapper/119:45:591
19253995540,10cyclictest0-21swapper/119:45:591
19253995524,25cyclictest26869-21sort19:51:251
1925199554,26cyclictest0-21swapper/021:15:440
1925199554,26cyclictest0-21swapper/021:15:440
19251995539,9cyclictest16023-21grep21:36:290
19251995536,12cyclictest25943-21grep18:46:170
5752544,43sleep00-21swapper/017:56:250
242299540,5rtkit-daemon2421-21rtkit-daemon20:26:182
1925599546,27cyclictest0-21swapper/218:36:112
1925599545,29cyclictest0-21swapper/222:26:212
1925599545,14cyclictest0-21swapper/220:11:152
1925599544,13cyclictest0-21swapper/217:41:122
19253995440,8cyclictest29093-21fschecks_time19:56:201
1925199544,33cyclictest0-21swapper/017:51:160
86992536,9sleep10-21swapper/121:23:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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