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2024-07-27 - 14:16

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 Sat Jul 27, 2024 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223189910210,67cyclictest0-21swapper/008:11:570
2231899984,28cyclictest0-21swapper/009:22:310
22318999829,47cyclictest0-21swapper/007:04:070
22322999728,12cyclictest0-21swapper/209:07:322
2232299953,85cyclictest12356-21grep07:17:372
2232299944,82cyclictest0-21swapper/211:27:192
2231899945,80cyclictest0-21swapper/008:51:550
2231899945,73cyclictest0-21swapper/010:52:230
2231899944,26cyclictest0-21swapper/011:07:010
2231899944,26cyclictest0-21swapper/011:07:010
22318999430,47cyclictest0-21swapper/009:02:310
2232299934,81cyclictest0-21swapper/208:51:562
2231899934,81cyclictest0-21swapper/009:17:200
2231899934,80cyclictest0-21swapper/011:32:240
2231899934,31cyclictest0-21swapper/009:57:450
22318999331,44cyclictest0-21swapper/007:41:370
22318999324,9cyclictest17126-21munin-node10:42:120
2231899915,29cyclictest0-21swapper/008:26:570
22318999139,44cyclictest12-21rcu_preempt11:56:590
2231899905,27cyclictest0-21swapper/009:12:270
2231899905,27cyclictest0-21swapper/009:12:270
2231899904,79cyclictest0-21swapper/010:32:090
2231899904,79cyclictest0-21swapper/010:32:090
2231899904,78cyclictest0-21swapper/007:32:250
2231899903,29cyclictest0-21swapper/007:42:290
22318999022,14cyclictest0-21swapper/008:36:570
22318999022,12cyclictest0-21swapper/007:22:330
22318999018,13cyclictest0-21swapper/009:37:270
22318999017,14cyclictest0-21swapper/010:47:120
22322998937,44cyclictest13442-21head09:27:312
2231899894,78cyclictest0-21swapper/010:22:100
2231899894,77cyclictest0-21swapper/010:07:270
22318998921,13cyclictest0-21swapper/007:17:380
22318998917,15cyclictest0-21swapper/011:12:080
2232199883,78cyclictest0-21swapper/108:37:071
2231899885,28cyclictest0-21swapper/008:42:070
2231899884,23cyclictest0-21swapper/011:02:180
22322998731,10cyclictest9828-21unixbench_singl07:12:402
2232299873,77cyclictest0-21swapper/209:16:552
2232299873,77cyclictest0-21swapper/209:16:552
2232299873,34cyclictest0-21swapper/211:11:592
2232299872,36cyclictest18908-21grep08:37:102
2231899876,27cyclictest0-21swapper/007:09:410
2231899875,75cyclictest0-21swapper/011:37:200
2231899874,75cyclictest0-21swapper/008:59:270
2232199863,63cyclictest0-21swapper/108:17:201
2231899866,73cyclictest0-21swapper/010:27:150
2231899864,27cyclictest0-21swapper/008:38:270
2231899864,27cyclictest0-21swapper/006:47:370
22318998623,12cyclictest0-21swapper/010:12:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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