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2026-04-12 - 23:15

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 Sun Apr 12, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2413523624,0sleep00-21swapper/006:56:320
304450350,0irq/25-eth10-21swapper/306:54:063
2403123526,0sleep20-21swapper/206:55:182
2395923228,0sleep10-21swapper/106:54:291
4160,0ktimersoftd/00-21swapper/008:03:580
339960,0migration/35460-21sh09:46:053
339960,0migration/35009-21sh09:04:543
339960,0migration/33054-21taskset11:44:143
339960,0migration/329899-21sh10:22:483
29725060,0irq/27-eth0-tx-0-21swapper/210:18:352
29715060,0irq/26-eth0-rx-8062-21kernelversion09:08:573
29715060,0irq/26-eth0-rx-31455-21kernelversion10:43:563
29715060,0irq/26-eth0-rx-1569-21grep09:23:583
29715060,0irq/26-eth0-rx-11737-21ssh11:30:003
19160,0ktimersoftd/10-21swapper/112:06:231
19160,0ktimersoftd/10-21swapper/109:07:261
8215050,0irq/24-0000:00:5539-21munin-run10:48:402
8215050,0irq/24-0000:00:14438-21munin-run09:53:402
4150,0ktimersoftd/00-21swapper/011:32:190
35150,0ktimersoftd/30-21swapper/312:06:233
339950,0migration/38046-21kthreadcore07:08:583
339950,0migration/37486-21kthreadcore10:48:583
339950,0migration/37115-21fschecks_time07:33:553
339950,0migration/36848-21fschecks_count10:08:543
339950,0migration/332414-21irqrtprio07:03:563
339950,0migration/332069-21kthreadcore12:23:593
339950,0migration/327791-21munin-node07:48:573
339950,0migration/327659-21kthreadcore06:58:583
339950,0migration/326051-21kthreadcore08:33:583
339950,0migration/325581-21munin-node07:44:023
339950,0migration/325580-21kthreadcore08:08:593
339950,0migration/323400-21fschecks_count09:38:533
339950,0migration/322781-21aten2.4-expect09:58:513
339950,0migration/322133-21taskset09:57:543
339950,0migration/317755-21kthreadcore08:53:593
339950,0migration/316884-21kthreadcore10:13:563
339950,0migration/315469-21fschecks_time09:13:543
339950,0migration/315281-21kthreadcore11:53:563
339950,0migration/315003-21idleruntime10:33:543
339950,0migration/31483-21sh08:18:413
339950,0migration/313670-21aten_r1power_vo11:13:503
339950,0migration/313495-21unixbench_singl07:59:043
339950,0migration/311913-21taskset12:12:213
339950,0migration/311425-21sh11:50:053
29725050,0irq/27-eth0-tx-20972-21unixbench_multi09:34:032
29725050,0irq/27-eth0-tx-12644-21munin-node12:13:552
29715050,0irq/26-eth0-rx-28500-21ssh12:03:073
29715050,0irq/26-eth0-rx-27248-21processes11:18:583
29715050,0irq/26-eth0-rx-25402-21kthreadcore10:58:583
29715050,0irq/26-eth0-rx-21185-21ssh10:57:343
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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