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2025-12-18 - 22:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 50 highest latencies:
System rack1slot2s.osadl.org (updated Thu Dec 18, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3161824028,0sleep00-21swapper/007:05:010
3180023827,0sleep30-21swapper/307:07:083
3185823627,0sleep20-21swapper/207:07:472
3187923324,0sleep10-21swapper/107:08:021
32080992120,0cyclictest14879-21turbostat11:49:292
320719976,0cyclictest0-21swapper/010:04:120
339960,0migration/327896-21kthreadcore10:39:473
339960,0migration/314796-21sh10:32:023
320809966,0cyclictest0-21swapper/211:02:392
320739960,0cyclictest0-21swapper/110:36:451
320719963,0cyclictest17637-21kworker/0:010:51:550
29725060,0irq/27-eth0-tx-14209-21munin-node07:44:550
29715060,0irq/26-eth0-rx-30333-21if_err_eth1.308:44:443
29715060,0irq/26-eth0-rx-26169-21grep07:49:493
29715060,0irq/26-eth0-rx-15194-21open_files10:49:493
149960,0migration/06096-21sh09:13:570
149960,0migration/04670-21sh11:24:340
149960,0migration/022466-21sh10:19:240
149960,0migration/018346-21kthreadcore09:19:470
8215050,0irq/24-0000:00:7357-21munin-run07:39:292
8215050,0irq/24-0000:00:10201-21latency_hist08:54:292
339950,0migration/37951-21taskset12:04:003
339950,0migration/37920-21kthreadcore11:24:473
339950,0migration/33598-21latency_hist09:49:293
339950,0migration/331978-21kthreadcore11:39:473
339950,0migration/331668-21unixbench_singl12:14:533
339950,0migration/328350-21kthreadcore07:29:473
339950,0migration/325522-21kthreadcore11:34:473
339950,0migration/32484-21sh11:20:233
339950,0migration/324522-21proc_pri09:39:503
339950,0migration/321453-21kthreadcore11:14:463
339950,0migration/319332-21diskmemload09:56:423
339950,0migration/319192-21unixbench_multi07:19:523
339950,0migration/318415-21kthreadcore08:09:483
339950,0migration/316502-21taskset08:55:313
339950,0migration/31527-21fschecks_time09:29:433
339950,0migration/311303-21kthreadcore09:34:463
339950,0migration/310504-21aten_r1power_vo12:24:403
320809950,0cyclictest0-21swapper/211:25:402
320809950,0cyclictest0-21swapper/209:41:082
320809950,0cyclictest0-21swapper/209:10:242
320739955,0cyclictest0-21swapper/112:38:381
320739955,0cyclictest0-21swapper/112:14:401
320739955,0cyclictest0-21swapper/109:19:301
320739950,0cyclictest0-21swapper/110:08:321
320739950,0cyclictest0-21swapper/109:26:361
320719955,0cyclictest17637-21kworker/0:010:29:450
320719953,0cyclictest17637-21kworker/0:012:35:280
320719953,0cyclictest17637-21kworker/0:012:29:440
320719953,0cyclictest17637-21kworker/0:012:24:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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