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2026-05-03 - 20:53

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 May 03, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
191860,0ktimersoftd/114758-21perf06:56:321
2119723635,0sleep20-21swapper/206:55:122
304450350,0irq/25-eth10-21swapper/306:52:333
2095223329,0sleep00-21swapper/006:52:220
35160,0ktimersoftd/30-21swapper/310:03:253
35160,0ktimersoftd/30-21swapper/310:03:253
339960,0migration/324899-21munin-node11:17:043
339960,0migration/319949-21fschecks_time10:36:543
339960,0migration/318945-21sh09:34:223
29725060,0irq/27-eth0-tx-23503-21munin-node07:46:560
29725060,0irq/27-eth0-tx-15883-21munin-node07:17:060
29715060,0irq/26-eth0-rx-26232-21yum09:37:063
29715060,0irq/26-eth0-rx-18347-21ssh10:55:133
29715060,0irq/26-eth0-rx-13318-21kthreadcore09:51:593
29715060,0irq/26-eth0-rx-12327-21entropy09:11:563
214039960,0cyclictest0-21swapper/207:02:052
213959965,0cyclictest19444-21diskmemload11:01:231
213949965,0cyclictest25586-21ssh12:00:350
149960,0migration/09441-21sh11:08:200
339950,0migration/39810-21sh09:27:043
339950,0migration/38757-21sh11:27:153
339950,0migration/38365-21kthreadcore08:21:593
339950,0migration/37989-21kthreadcore10:06:583
339950,0migration/36011-21kthreadcore07:31:593
339950,0migration/34492-21gltestperf09:46:553
339950,0migration/32981-21sh10:46:433
339950,0migration/328659-21irqrtprio10:41:583
339950,0migration/328355-21kthreadcore08:36:593
339950,0migration/327904-21cpuspeed_turbos10:21:553
339950,0migration/327378-21gltestperf11:41:563
339950,0migration/325477-21kthreadcore07:21:583
339950,0migration/325448-21taskset12:21:013
339950,0migration/325444-21ntp_offset09:57:003
339950,0migration/325373-21munin-node08:11:593
339950,0migration/319241-21sh10:56:533
339950,0migration/318610-21munin-node11:36:523
339950,0migration/317688-21idleruntime07:41:573
339950,0migration/317600-21latency_hist08:06:423
339950,0migration/316740-21munin-node07:16:583
339950,0migration/314290-21kthreadcore10:12:003
339950,0migration/31359-21munin-node09:22:013
339950,0migration/311349-21fschecks_count11:11:533
339950,0migration/310556-21taskset07:57:413
29725050,0irq/27-eth0-tx-3620-21munin-node09:07:042
29725050,0irq/27-eth0-tx-2305-21ssh09:22:512
29725050,0irq/27-eth0-tx-14288-21kthreadcore10:51:592
29725050,0irq/27-eth0-tx-12950-21iostat_ios09:11:592
29725050,0irq/27-eth0-tx-11142-21munin-node08:02:080
29725050,0irq/27-eth0-tx-0-21swapper/211:16:582
29725050,0irq/27-eth0-tx-0-21swapper/210:08:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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