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2025-07-07 - 02:16

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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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.

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 20 highest latencies:
System rack4slot1s.osadl.org (updated Mon Jul 07, 2025 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1420521560,2sleep114206-21fschecks_count22:31:421
1420521560,2sleep114206-21fschecks_count22:31:421
51552970,2chrt5150-21strings22:06:440
51552970,2chrt5150-21strings22:06:440
51552970,2chrt5150-21strings22:06:440
225502950,2chrt22549-21sensors_temp00:16:501
225502950,2chrt22549-21sensors_temp00:16:501
322972930,3chrt31519-21/usr/sbin/munin20:26:481
88972750,3chrt0-21swapper/123:41:441
88972750,3chrt0-21swapper/123:41:441
264932730,2sleep10-21swapper/120:11:451
272762620,4chrt27265-21awk21:41:251
211552600,3sleep20-21swapper/219:56:502
211552600,3sleep20-21swapper/219:56:502
310562580,2sleep131057-21cat00:41:301
55562570,1sleep10-21swapper/122:06:491
55562570,1sleep10-21swapper/122:06:491
55562570,1sleep10-21swapper/122:06:491
327332570,2chrt32736-21unixbench_multi20:26:510
3122995535,13cyclictest55150irq/47-eth022:46:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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