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2024-07-12 - 15:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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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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 rack7slot4s.osadl.org (updated Thu Jul 11, 2024 12:45:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24005996820,8cyclictest131rcu_preempt09:05:101
2400499583,44cyclictest27619-21ssh10:00:120
24017995642,10cyclictest25866irq/58-eth010:30:163
24004995421,24cyclictest12-21ksoftirqd/011:35:110
24004995421,24cyclictest12-21ksoftirqd/011:35:100
2400499521,48cyclictest4434-21ssh10:45:120
2400499520,43cyclictest21502-21ssh12:25:130
2400499512,37cyclictest3206-21ssh10:25:140
24006994911,27cyclictest0-21swapper/212:05:152
2400499483,32cyclictest10024-21ssh11:25:140
24005994721,18cyclictest21-21ksoftirqd/110:05:131
2400499473,6cyclictest131rcu_preempt09:35:140
2400699452,23cyclictest10032-21sh11:25:162
24006994327,8cyclictest28356-21apt-get10:40:122
2400499431,30cyclictest11830-21ssh09:10:130
2400499431,30cyclictest11830-21ssh09:10:120
2401799421,23cyclictest25866irq/58-eth010:55:153
24006994212,21cyclictest8705-21ssh12:00:132
2400599424,30cyclictest13880-21ssh11:45:111
2400599411,15cyclictest131rcu_preempt08:30:161
24017994011,21cyclictest25866irq/58-eth011:50:153
24006994016,19cyclictest0-21swapper/211:20:142
2400599391,30cyclictest17802-21ssh12:05:151
2400599382,5cyclictest131rcu_preempt08:40:141
2401799372,22cyclictest25866irq/58-eth010:25:153
24006993729,4cyclictest27650-21apt-get08:20:122
2400499371,27cyclictest0-21swapper/009:20:110
24006993620,11cyclictest11584-21ssh09:30:132
24006993614,17cyclictest0-21swapper/210:20:142
24006993614,10cyclictest0-21swapper/209:05:102
24006993521,10cyclictest27591-21apt-get09:40:142
24006993512,8cyclictest11492-21ssh10:30:172
24006993428,2cyclictest24305-21apt-get11:15:112
24005993415,15cyclictest21-21ksoftirqd/107:10:191
2400699335,18cyclictest22146irq/40-dwc2_hso09:45:142
2400699332,20cyclictest22146irq/40-dwc2_hso12:15:122
24006993320,7cyclictest12917-21apt-get08:05:112
24006993314,14cyclictest0-21swapper/211:35:132
24006993314,14cyclictest0-21swapper/211:35:132
24006993310,17cyclictest0-21swapper/211:00:142
2400599332,24cyclictest19135-21ssh09:15:131
24006993228,2cyclictest30546-21apt-get12:30:152
24006993217,11cyclictest0-21swapper/210:10:142
24006993212,18cyclictest0-21swapper/212:20:152
2400599323,23cyclictest26799-21ssh12:10:111
2400599321,22cyclictest11434-21ssh09:50:151
2400499322,23cyclictest13156-21ssh10:50:150
24004993217,13cyclictest12-21ksoftirqd/011:40:140
24004993217,13cyclictest12-21ksoftirqd/011:40:130
2400499321,22cyclictest11429-21diskmemload12:30:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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