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2025-02-19 - 00:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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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Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rack4slot1s.osadl.org (updated Tue Feb 18, 2025 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2949721270,3sleep30-21swapper/308:22:513
2949721270,3sleep30-21swapper/308:22:513
1825521070,2chrt18253-21df09:22:490
1825521070,2chrt18253-21df09:22:490
320612810,3sleep20-21swapper/211:47:512
87072780,2sleep20-21swapper/208:52:532
87072780,2sleep20-21swapper/208:52:532
225602750,2sleep0171ktimers/011:17:540
225602750,2sleep0171ktimers/011:17:540
159182730,3chrt0-21swapper/207:47:492
159182730,3chrt0-21swapper/207:47:492
4189996349,8cyclictest0-21swapper/007:27:490
4189996349,8cyclictest0-21swapper/007:27:490
4189996349,8cyclictest0-21swapper/007:27:490
293512630,3sleep10-21swapper/109:57:481
293512630,3sleep10-21swapper/109:57:481
256182620,3sleep30-21swapper/311:27:503
223542610,2sleep122355-21ntpq11:17:511
223542610,2sleep122355-21ntpq11:17:511
311102600,2chrt0-21swapper/208:27:482
4189995633,20cyclictest21293-21kworker/u9:3+rpciod11:37:420
4189995633,20cyclictest21293-21kworker/u9:3+rpciod11:37:420
160832560,3chrt0-21swapper/210:57:502
153502550,2sleep00-21swapper/012:37:530
37882536,9sleep10-21swapper/107:15:521
4189994912,27cyclictest0-21swapper/008:17:450
291332490,2sleep029132-21cpu08:22:480
291332490,2sleep029132-21cpu08:22:480
419099482,42cyclictest271rcuc/110:07:471
419099482,42cyclictest271rcuc/110:07:471
126572480,3chrt0-21swapper/209:02:582
126572480,3chrt0-21swapper/209:02:582
418999474,38cyclictest0-21swapper/011:57:420
215502470,3sleep3431rcuc/308:02:493
88252460,4sleep20-21swapper/207:27:552
88252460,4sleep20-21swapper/207:27:552
88252460,4sleep20-21swapper/207:27:552
419099464,32cyclictest690-21gpm09:47:471
419099464,32cyclictest690-21gpm09:47:471
419099462,6cyclictest181rcu_preempt12:07:481
419099462,6cyclictest181rcu_preempt12:07:481
4189994614,26cyclictest0-21swapper/008:32:470
4189994614,26cyclictest0-21swapper/008:32:470
58332440,3sleep20-21swapper/208:47:342
58332440,3sleep20-21swapper/208:47:342
418999444,31cyclictest15136-21latency_hist10:57:410
418999444,31cyclictest15136-21latency_hist10:57:410
4189994430,10cyclictest32581-21apt-get10:07:470
4189994430,10cyclictest32581-21apt-get10:07:470
308672440,3sleep10-21swapper/110:02:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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