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2026-07-14 - 10:54

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 100 highest latencies:
System rack1slot2s.osadl.org (updated Tue Jul 14, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2841723930,0sleep20-21swapper/218:46:252
304450350,0irq/25-eth10-21swapper/318:44:583
2868323420,0sleep00-21swapper/018:49:310
2856123423,0sleep10-21swapper/118:48:081
339960,0migration/39265-21sh00:19:213
339960,0migration/33595-21fschecks_time21:55:073
339960,0migration/326776-21df_abs23:30:053
339960,0migration/326238-21sh22:07:523
339960,0migration/325997-21sh21:07:053
339960,0migration/325431-21sh23:07:113
339960,0migration/322983-21sshd19:09:073
339960,0migration/318296-21sh22:23:373
339960,0migration/317847-21sh23:24:083
339960,0migration/310192-21sh21:37:403
287839960,0cyclictest0-21swapper/121:34:041
287829960,0cyclictest28810-21runrttasks19:10:150
287829960,0cyclictest0-21swapper/022:12:490
149960,0migration/029232-21cpuspeed_turbos18:50:040
149960,0migration/010892-21sh21:19:110
149960,0migration/010046-21sh22:38:300
339950,0migration/3646-21runrttasks22:10:163
339950,0migration/35434-21irqrtprio19:20:103
339950,0migration/34856-21kthreadcore23:15:103
339950,0migration/3356-21runrttasks23:51:343
339950,0migration/332115-21kthreadcore18:50:103
339950,0migration/330503-21latency20:00:123
339950,0migration/329371-21taskset19:10:573
339950,0migration/328123-21fschecks_time21:30:073
339950,0migration/313014-21kthreadcore19:00:113
339950,0migration/311882-21fschecks_time21:40:063
339950,0migration/311882-21fschecks_time21:40:063
339950,0migration/311194-21irqcore23:40:093
339950,0migration/310679-21munin-node00:00:043
29725050,0irq/27-eth0-tx-3532-21ntpd23:15:132
29725050,0irq/27-eth0-tx-0-21swapper/020:49:550
29725050,0irq/27-eth0-tx-0-21swapper/020:45:130
29725050,0irq/27-eth0-tx-0-21swapper/020:10:130
29725050,0irq/27-eth0-tx-0-21swapper/019:40:060
29725050,0irq/27-eth0-tx-0-21swapper/019:39:350
29715050,0irq/26-eth0-rx-7320-21mdstat23:55:103
29715050,0irq/26-eth0-rx-6447-21cut22:15:103
29715050,0irq/26-eth0-rx-4482-21tr22:35:103
29715050,0irq/26-eth0-rx-27750-21diskstats21:50:063
29715050,0irq/26-eth0-rx-23815-21grep22:25:103
29715050,0irq/26-eth0-rx-18048-21chrt00:05:053
29715050,0irq/26-eth0-rx-12473-21kernelversion22:00:093
29715050,0irq/26-eth0-rx-10352-21kthreadcore20:35:113
29715050,0irq/26-eth0-rx-10103-21ssh22:59:173
29715050,0irq/26-eth0-rx-0-21swapper/323:10:223
29715050,0irq/26-eth0-rx-0-21swapper/322:59:523
29715050,0irq/26-eth0-rx-0-21swapper/321:24:533
29715050,0irq/26-eth0-rx-0-21swapper/321:19:383
29715050,0irq/26-eth0-rx-0-21swapper/321:10:033
29715050,0irq/26-eth0-rx-0-21swapper/321:00:153
29715050,0irq/26-eth0-rx-0-21swapper/320:55:073
287859950,0cyclictest0-21swapper/222:43:372
287859950,0cyclictest0-21swapper/222:33:322
287859950,0cyclictest0-21swapper/222:12:432
287859950,0cyclictest0-21swapper/221:20:222
287859950,0cyclictest0-21swapper/200:17:442
287839955,0cyclictest0-21swapper/123:20:581
287839955,0cyclictest0-21swapper/122:24:311
287839950,0cyclictest0-21swapper/123:55:481
287839950,0cyclictest0-21swapper/122:55:351
287829955,0cyclictest0-21swapper/023:28:100
287829955,0cyclictest0-21swapper/023:00:260
287829955,0cyclictest0-21swapper/000:04:070
287829954,0cyclictest12238-21awk21:40:080
287829954,0cyclictest12238-21awk21:40:080
287829950,0cyclictest0-21swapper/022:03:500
27150,0ktimersoftd/20-21swapper/200:08:132
249950,0watchdog/26223-21kthreadcore21:55:112
249950,0watchdog/217863-21chrt23:24:112
179950,0migration/19565-21taskset21:56:091
179950,0migration/131578-21kthreadcore19:15:101
179950,0migration/125297-21switchtime21:25:161
179950,0migration/12451-21latency_hist22:34:521
179950,0migration/119248-21missed_timers20:40:131
179950,0migration/111610-21fschecks_count22:00:061
169950,0watchdog/120116-21kthreadcore00:05:111
169950,0watchdog/10-21swapper/121:00:151
149950,0migration/09469-21taskset21:55:520
149950,0migration/07700-21timerwakeupswit00:15:160
149950,0migration/0705-21cpuspeed_turbos20:30:060
149950,0migration/04336-21aten_r1power_fr19:20:060
149950,0migration/04147-21idleruntime18:55:080
149950,0migration/04047-21kthreadcore23:55:080
149950,0migration/03221-21fschecks_count20:55:080
149950,0migration/031892-21taskset20:04:570
149950,0migration/031480-21kthreadcore21:10:090
149950,0migration/029571-21kthreadcore21:50:100
149950,0migration/028885-21kthreadcore23:50:100
149950,0migration/027108-21gltestperf23:30:060
149950,0migration/026538-21latency_hist23:09:520
149950,0migration/026282-21munin-node20:25:050
149950,0migration/02584-21aten_r1power_fr22:55:040
149950,0migration/025805-21fschecks_time20:00:070
149950,0migration/025649-21taskset22:26:470
149950,0migration/025496-21taskset21:45:270
149950,0migration/02469-21kthreadcore19:15:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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