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2026-05-07 - 16:07

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 Thu May 07, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
985123525,0sleep20-21swapper/206:54:022
304450350,0irq/25-eth10-21swapper/306:52:523
1000423523,0sleep00-21swapper/006:55:480
991523324,0sleep10-21swapper/106:54:451
339960,0migration/36996-21sh10:32:513
339960,0migration/332111-21sh10:30:043
339960,0migration/324195-21sh10:05:103
339960,0migration/323223-21sh10:43:213
339960,0migration/322957-21sh09:01:433
339960,0migration/316439-21runrttasks09:40:203
339960,0migration/315475-21sh11:20:303
339960,0migration/315381-21sh08:58:293
29725060,0irq/27-eth0-tx-0-21swapper/210:50:512
29715060,0irq/26-eth0-rx-5236-21sed12:11:413
29715060,0irq/26-eth0-rx-3914-21grep10:11:363
29715060,0irq/26-eth0-rx-23039-21taskset09:21:413
29715060,0irq/26-eth0-rx-22094-21python11:01:393
29715060,0irq/26-eth0-rx-16957-21sh09:21:173
259960,0migration/26369-21idleruntime-cro08:06:192
101219960,0cyclictest8341-21diskmemload11:49:261
101219960,0cyclictest0-21swapper/109:05:001
101209965,0cyclictest0-21swapper/010:51:360
101209960,0cyclictest0-21swapper/010:36:470
8215050,0irq/24-0000:00:17711-21dump-pmu-power07:26:202
339950,0migration/3867-21diskmemload09:31:233
339950,0migration/38228-21runrttasks09:14:453
339950,0migration/37756-21aten_r1power_en11:36:293
339950,0migration/37096-21kthreadcore07:41:363
339950,0migration/3494-21kthreadcore07:36:353
339950,0migration/33606-21smart_sdb07:11:413
339950,0migration/33527-21kthreadcore11:51:363
339950,0migration/330550-21missed_timers09:46:353
339950,0migration/329430-21kthreadcore10:46:363
339950,0migration/326657-21munin-node08:21:303
339950,0migration/32616-21kthreadcore08:26:353
339950,0migration/325912-21kernelversion07:31:343
339950,0migration/325134-21hwlatdetect11:06:333
339950,0migration/323658-21kthreadcore08:41:363
339950,0migration/323338-21diskmemload10:23:033
339950,0migration/322333-21kthreadcore08:16:353
339950,0migration/321562-21unixbench-2d12:01:413
339950,0migration/320640-21kthreadcore07:26:363
339950,0migration/316803-21gltestperf11:21:333
339950,0migration/31520-21hddtemp_smartct09:51:333
339950,0migration/313621-21taskset08:32:223
339950,0migration/313258-21taskset08:11:203
339950,0migration/312898-21ntp_offset12:16:373
339950,0migration/310420-21kthreadcore10:36:343
29725050,0irq/27-eth0-tx-8024-21munin-node11:16:302
29725050,0irq/27-eth0-tx-6595-21munin-node08:06:330
29725050,0irq/27-eth0-tx-466-21munin-node10:11:342
29725050,0irq/27-eth0-tx-377-21ssh12:11:352
29725050,0irq/27-eth0-tx-24618-21munin-node07:31:300
29725050,0irq/27-eth0-tx-24603-21if_err_eth011:46:322
29725050,0irq/27-eth0-tx-24278-21ssh09:44:502
29725050,0irq/27-eth0-tx-1834-21munin-node08:51:360
29725050,0irq/27-eth0-tx-0-21swapper/211:42:312
29725050,0irq/27-eth0-tx-0-21swapper/209:31:562
29725050,0irq/27-eth0-tx-0-21swapper/209:26:332
29715050,0irq/26-eth0-rx-5355-21memory11:11:353
29715050,0irq/26-eth0-rx-28923-21kthreadcore11:46:353
29715050,0irq/26-eth0-rx-21373-21grep07:01:363
29715050,0irq/26-eth0-rx-0-21swapper/312:22:403
29715050,0irq/26-eth0-rx-0-21swapper/312:06:343
29715050,0irq/26-eth0-rx-0-21swapper/311:43:563
29715050,0irq/26-eth0-rx-0-21swapper/311:27:313
29715050,0irq/26-eth0-rx-0-21swapper/310:17:443
29715050,0irq/26-eth0-rx-0-21swapper/310:07:303
29715050,0irq/26-eth0-rx-0-21swapper/309:57:263
29715050,0irq/26-eth0-rx-0-21swapper/309:41:363
29715050,0irq/26-eth0-rx-0-21swapper/309:26:333
29715050,0irq/26-eth0-rx-0-21swapper/309:06:343
29715050,0irq/26-eth0-rx-0-21swapper/307:47:493
259950,0migration/28967-21latency_hist09:36:192
259950,0migration/28306-21munin-node12:16:332
259950,0migration/27516-21latency_hist11:36:192
259950,0migration/225277-21irqrtprio11:26:342
259950,0migration/224921-21fschecks_time11:06:322
259950,0migration/222119-21munin-node10:21:362
259950,0migration/210292-21kthreadcore08:06:352
249950,0watchdog/226359-21cut09:06:332
249950,0watchdog/214232-21aten_r1power_en08:36:292
179950,0migration/132399-21munin-node12:11:321
179950,0migration/129926-21kthreadcore08:21:361
179950,0migration/12529-21kthreadcore11:31:341
179950,0migration/123813-21sh10:24:281
179950,0migration/123669-21switchtime07:26:421
179950,0migration/115718-21kthreadcore07:21:381
179950,0migration/115645-21latency_hist11:41:191
179950,0migration/111652-21kthreadcore09:36:371
169950,0watchdog/19318-21irqcore10:56:331
169950,0watchdog/119963-21kthreadcore12:21:361
169950,0watchdog/116754-21ssh09:20:451
149950,0migration/09943-21kthreadcore10:56:330
149950,0migration/09077-21kthreadcore07:41:370
149950,0migration/07064-21taskset09:51:540
149950,0migration/06503-21ntp_kernel_pll_09:11:380
149950,0migration/05589-21munin-node07:16:340
149950,0migration/03269-21kthreadcore11:11:340
149950,0migration/032097-21idleruntime-cro11:11:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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