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2025-11-03 - 11:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 here to display the system's profile data or here to proceed to next system.
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 20 highest latencies:
System rack7slot7s.osadl.org (updated Mon Nov 03, 2025 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2252210680,9sleep10-21swapper/119:08:281
32697210470,9sleep00-21swapper/019:05:140
2107210086,9sleep30-21swapper/319:06:373
227028366,13sleep20-21swapper/219:08:412
246199341,1cyclictest12403-21seq21:20:493
246199310,0cyclictest0-21swapper/321:19:483
2453992411,8cyclictest18060-21/usr/sbin/munin22:10:191
244899240,0cyclictest141rcu_preempt23:28:310
246199230,22cyclictest2470-21cron21:59:593
245799230,23cyclictest0-21swapper/223:37:272
2448992316,2cyclictest13-21ksoftirqd/020:57:040
245799220,22cyclictest6526-21ls23:10:192
2453992220,1cyclictest221irq_work/121:51:111
2453992119,1cyclictest221irq_work/122:41:011
2453992119,1cyclictest221irq_work/122:23:021
2453992119,1cyclictest221irq_work/100:05:181
244899212,1cyclictest0-21swapper/021:16:310
246199201,14cyclictest31482-21/usr/sbin/munin23:50:163
2457992019,1cyclictest291irq_work/223:21:232
2457992019,1cyclictest291irq_work/222:03:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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