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2026-08-26 - 03:46

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 Wed Aug 26, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
271890,0ktimersoftd/212266-21perf18:45:382
304450770,0irq/25-eth10-21swapper/318:41:203
1879723423,0sleep00-21swapper/018:45:290
1855423430,0sleep10-21swapper/118:42:381
4160,0ktimersoftd/00-21swapper/022:12:580
339960,0migration/3762-21sh21:57:343
339960,0migration/34795-21sh21:01:033
339960,0migration/326782-21sh21:13:173
339960,0migration/323745-21sh23:14:493
339960,0migration/318071-21sh21:06:133
29715060,0irq/26-eth0-rx-8086-21aten2.4-expect23:25:593
29715060,0irq/26-eth0-rx-4020-21kthreadcore22:01:053
29715060,0irq/26-eth0-rx-26186-21cut19:36:053
27160,0ktimersoftd/211754-21diskmemload22:12:582
189019960,0cyclictest0-21swapper/221:20:232
149960,0migration/0514-21sh22:40:200
149960,0migration/023058-21sh23:12:450
149960,0migration/011646-21crond21:05:470
8215050,0irq/24-0000:00:30670-21kthreadcore19:41:052
8215050,0irq/24-0000:00:17896-21cat22:10:462
8215050,0irq/24-0000:00:0-21swapper/219:50:482
4150,0ktimersoftd/00-21swapper/022:56:070
35150,0ktimersoftd/30-21swapper/323:43:093
35150,0ktimersoftd/30-21swapper/321:16:103
339950,0migration/39465-21diskmemload21:42:543
339950,0migration/38022-21kthreadcore20:41:133
339950,0migration/36430-21kthreadcore20:16:083
339950,0migration/3584-21munin-node23:21:003
339950,0migration/332668-21kthreadcore00:01:043
339950,0migration/331658-21kthreadcore21:36:063
339950,0migration/330911-21kthreadcore19:16:053
339950,0migration/328020-21cpuspeed_turbos19:41:013
339950,0migration/32748-21irqrtprio22:21:023
339950,0migration/325864-21kthreadcore20:31:073
339950,0migration/325739-21latency_hist18:50:483
339950,0migration/317796-21switchtime20:46:113
339950,0migration/317632-21aten_r1power_cu20:25:593
339950,0migration/317379-21latency_hist22:30:463
339950,0migration/316514-21switchtime21:46:113
29725050,0irq/27-eth0-tx-987-21munin-node22:41:002
29725050,0irq/27-eth0-tx-8473-21munin-node23:06:072
29725050,0irq/27-eth0-tx-6258-21ssh23:43:242
29725050,0irq/27-eth0-tx-20071-21munin-node19:11:020
29725050,0irq/27-eth0-tx-1972-21forks22:20:592
29725050,0irq/27-eth0-tx-12315-21kthreadcore23:46:042
29725050,0irq/27-eth0-tx-11410-21perl21:46:022
29725050,0irq/27-eth0-tx-0-21swapper/221:15:072
29725050,0irq/27-eth0-tx-0-21swapper/220:55:272
29725050,0irq/27-eth0-tx-0-21swapper/019:46:350
29715050,0irq/26-eth0-rx-26151-21cut23:16:043
29715050,0irq/26-eth0-rx-20859-21tr23:31:053
29715050,0irq/26-eth0-rx-15879-21irqcore00:11:033
29715050,0irq/26-eth0-rx-155722sleep322:47:173
29715050,0irq/26-eth0-rx-13892-21expr19:06:023
29715050,0irq/26-eth0-rx-0-21swapper/323:46:313
29715050,0irq/26-eth0-rx-0-21swapper/323:39:293
29715050,0irq/26-eth0-rx-0-21swapper/323:06:233
29715050,0irq/26-eth0-rx-0-21swapper/322:58:083
29715050,0irq/26-eth0-rx-0-21swapper/322:36:363
29715050,0irq/26-eth0-rx-0-21swapper/322:26:013
29715050,0irq/26-eth0-rx-0-21swapper/322:16:023
29715050,0irq/26-eth0-rx-0-21swapper/322:11:533
29715050,0irq/26-eth0-rx-0-21swapper/321:54:423
29715050,0irq/26-eth0-rx-0-21swapper/321:31:303
29715050,0irq/26-eth0-rx-0-21swapper/321:31:303
29715050,0irq/26-eth0-rx-0-21swapper/321:21:173
29715050,0irq/26-eth0-rx-0-21swapper/320:55:413
29715050,0irq/26-eth0-rx-0-21swapper/319:46:023
259950,0migration/26755-21latency_hist00:05:462
259950,0migration/24238-21idleruntime21:21:022
259950,0migration/232248-21munin-node21:56:052
259950,0migration/224888-21sh22:34:552
259950,0migration/223401-21timerandwakeup20:26:182
259950,0migration/222151-21sh23:53:122
259950,0migration/218524-21taskset20:47:412
259950,0migration/217346-21kthreadcore00:11:042
259950,0migration/213479-21munin-node23:26:072
249950,0watchdog/231976-21cut00:01:012
249950,0watchdog/224494-21fschecks_time23:36:012
249950,0watchdog/212501-21kthreadcore20:21:062
19150,0ktimersoftd/10-21swapper/121:16:101
189019955,0cyclictest0-21swapper/223:31:142
189019955,0cyclictest0-21swapper/223:20:412
189019955,0cyclictest0-21swapper/222:15:532
189019955,0cyclictest0-21swapper/221:01:562
189019950,0cyclictest0-21swapper/223:59:182
189019950,0cyclictest0-21swapper/222:47:062
189019950,0cyclictest0-21swapper/221:10:372
189019950,0cyclictest0-21swapper/220:59:252
189009955,0cyclictest0-21swapper/122:56:091
189009950,0cyclictest0-21swapper/123:18:321
189009950,0cyclictest0-21swapper/122:11:411
189009950,0cyclictest0-21swapper/121:25:201
189009950,0cyclictest0-21swapper/121:11:091
189009950,0cyclictest0-21swapper/120:56:381
188999955,0cyclictest0-21swapper/023:17:250
188999955,0cyclictest0-21swapper/022:46:590
188999955,0cyclictest0-21swapper/022:32:470
188999955,0cyclictest0-21swapper/020:46:130
188999955,0cyclictest0-21swapper/020:00:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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