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2024-04-19 - 23:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 rack9slot4s (updated Fri Apr 19, 2024 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6719911981176,19cyclictest0-21swapper/107:25:081
6719911251112,9cyclictest10866-21mandb07:48:121
6709910661056,7cyclictest0-21swapper/007:25:130
5692652604,32sleep10-21swapper/107:24:321
4152470418,31sleep00-21swapper/007:22:550
670992651,229cyclictest0-21swapper/007:48:110
45732610,3sleep0111rcuc/008:55:330
287442550,4sleep181rcu_preempt08:35:171
671995222,4cyclictest22-21ksoftirqd/112:11:041
18712490,5sleep00-21swapper/010:20:090
671993817,4cyclictest22-21ksoftirqd/110:30:221
671993816,5cyclictest22-21ksoftirqd/111:21:371
671993815,4cyclictest22-21ksoftirqd/108:44:501
76162361,5sleep17620-21irqstats12:00:221
76162361,5sleep17620-21irqstats12:00:221
671993626,6cyclictest26700-21/usr/sbin/munin12:50:261
49162361,4sleep02376-21NetworkManager07:32:110
215602361,31sleep021680-21/usr/sbin/munin11:10:300
96552351,5sleep19717-21ntp_kernel_err12:05:451
671993427,4cyclictest22-21ksoftirqd/110:25:131
671993427,4cyclictest22-21ksoftirqd/109:25:201
67199336,7cyclictest81rcu_preempt08:25:171
671993327,3cyclictest22-21ksoftirqd/109:20:091
671993326,4cyclictest22-21ksoftirqd/111:45:131
671993326,4cyclictest22-21ksoftirqd/111:40:111
671993326,4cyclictest22-21ksoftirqd/111:35:291
671993326,4cyclictest22-21ksoftirqd/111:30:161
671993326,4cyclictest22-21ksoftirqd/110:40:231
671993326,4cyclictest22-21ksoftirqd/110:15:001
671993326,4cyclictest22-21ksoftirqd/109:30:121
671993326,4cyclictest22-21ksoftirqd/109:15:001
671993326,4cyclictest22-21ksoftirqd/109:05:111
671993326,4cyclictest22-21ksoftirqd/109:00:131
671993326,4cyclictest22-21ksoftirqd/108:50:121
671993326,4cyclictest22-21ksoftirqd/108:05:151
671993326,4cyclictest22-21ksoftirqd/107:30:121
671993325,4cyclictest22-21ksoftirqd/109:15:121
67099335,4cyclictest81rcu_preempt10:50:000
67099331,4cyclictest81rcu_preempt12:15:320
149702331,27sleep115050-21/usr/sbin/munin10:55:111
671993226,4cyclictest22-21ksoftirqd/112:15:181
671993226,4cyclictest22-21ksoftirqd/111:00:181
671993226,4cyclictest22-21ksoftirqd/107:40:131
671993226,3cyclictest22-21ksoftirqd/111:50:121
671993226,3cyclictest22-21ksoftirqd/108:05:001
671993225,4cyclictest22-21ksoftirqd/112:35:171
671993225,4cyclictest22-21ksoftirqd/112:25:151
671993225,4cyclictest22-21ksoftirqd/112:20:181
671993225,4cyclictest22-21ksoftirqd/111:05:151
671993225,4cyclictest22-21ksoftirqd/110:50:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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