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2026-06-29 - 04:01

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 Mon Jun 29, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2807226059,0sleep20-21swapper/218:48:512
304450390,0irq/25-eth10-21swapper/318:51:063
2803423824,0sleep00-21swapper/018:48:280
2826922622,0sleep10-21swapper/118:51:101
35160,0ktimersoftd/30-21swapper/321:01:353
339960,0migration/39715-21sh21:17:523
339960,0migration/3645-21sh23:53:273
339960,0migration/332436-21munin-node22:51:393
339960,0migration/329551-21timerandwakeup19:36:423
339960,0migration/324102-21sh23:26:383
339960,0migration/317492-21sh00:05:083
339960,0migration/31407-21sh23:14:203
339960,0migration/310969-21df_abs23:01:303
339960,0migration/310230-21latency_hist23:41:193
29715060,0irq/26-eth0-rx-3154-21perl22:56:333
29715060,0irq/26-eth0-rx-19596-21perl21:06:333
29715060,0irq/26-eth0-rx-16653-21python22:21:403
283539960,0cyclictest26505-21diskmemload23:39:222
27160,0ktimersoftd/20-21swapper/221:25:402
149960,0migration/09112-21sh20:58:060
149960,0migration/0729-21sh22:32:020
149960,0migration/0680-21sh20:52:450
149960,0migration/018572-21sh21:25:100
149960,0migration/017806-21sh21:04:150
149960,0migration/017232-21sh22:22:180
149960,0migration/01210-21sh21:52:280
35150,0ktimersoftd/30-21swapper/322:29:433
339950,0migration/38741-21kthreadcore20:11:363
339950,0migration/36523-21kthreadcore00:16:373
339950,0migration/35744-21munin-node22:36:353
339950,0migration/35584-21kthreadcore23:56:363
339950,0migration/34259-21irqrtprio21:36:353
339950,0migration/33770-21munin-node21:56:343
339950,0migration/330513-21kthreadcore18:51:363
339950,0migration/330335-21kthreadcore00:11:363
339950,0migration/328655-21kthreadcore20:01:373
339950,0migration/327245-21munin-node21:11:313
339950,0migration/324580-21kthreadcore20:46:373
339950,0migration/319404-21df_abs22:06:323
339950,0migration/318215-21latency_hist23:46:193
339950,0migration/318215-21latency_hist23:46:193
339950,0migration/317967-21kthreadcore19:06:363
339950,0migration/314777-21kthreadcore22:01:363
339950,0migration/313138-21kthreadcore21:41:373
339950,0migration/312341-21irqcore21:21:363
29725050,0irq/27-eth0-tx-8331-21netstat22:16:402
29725050,0irq/27-eth0-tx-32411-21munin-node20:31:380
29725050,0irq/27-eth0-tx-2576-21munin-node22:36:312
29725050,0irq/27-eth0-tx-19634-21kernelversion23:46:342
29725050,0irq/27-eth0-tx-19634-21kernelversion23:46:342
29725050,0irq/27-eth0-tx-19109-21munin-node20:21:310
29725050,0irq/27-eth0-tx-19011-21munin-node22:06:332
29725050,0irq/27-eth0-tx-12436-21munin-node20:16:320
29725050,0irq/27-eth0-tx-11291-21cpuspeed_turbos22:01:312
29725050,0irq/27-eth0-tx-10025-21ssh23:20:402
29725050,0irq/27-eth0-tx-0-21swapper/223:31:502
29725050,0irq/27-eth0-tx-0-21swapper/222:34:532
29725050,0irq/27-eth0-tx-0-21swapper/019:55:410
29725050,0irq/27-eth0-tx-0-21swapper/019:00:320
29715050,0irq/26-eth0-rx-28819-21tr23:31:363
29715050,0irq/26-eth0-rx-2318-21ssh20:56:283
29715050,0irq/26-eth0-rx-0-21swapper/323:36:333
29715050,0irq/26-eth0-rx-0-21swapper/323:21:393
29715050,0irq/26-eth0-rx-0-21swapper/323:16:423
29715050,0irq/26-eth0-rx-0-21swapper/322:43:243
29715050,0irq/26-eth0-rx-0-21swapper/322:11:373
29715050,0irq/26-eth0-rx-0-21swapper/321:51:183
29715050,0irq/26-eth0-rx-0-21swapper/321:26:273
29715050,0irq/26-eth0-rx-0-21swapper/319:31:373
283539955,0cyclictest0-21swapper/223:22:012
283539955,0cyclictest0-21swapper/222:53:012
283539955,0cyclictest0-21swapper/221:18:062
283519950,0cyclictest0-21swapper/123:55:371
283519950,0cyclictest0-21swapper/122:40:341
283519950,0cyclictest0-21swapper/100:06:011
283509955,0cyclictest20894-21kworker/0:122:06:440
283509955,0cyclictest0-21swapper/022:46:340
283509954,0cyclictest26672-21ssh23:11:200
283509950,0cyclictest18450-21munin-run23:06:190
259950,0migration/230336-21idleruntime19:16:342
259950,0migration/223547-21sh22:26:362
259950,0migration/220683-21kthreadcore23:06:352
249950,0watchdog/20-21swapper/223:56:372
249950,0watchdog/20-21swapper/221:26:332
179950,0migration/19320-21taskset20:58:431
179950,0migration/132235-21idleruntime20:06:341
179950,0migration/130178-21kthreadcore22:51:361
179950,0migration/12800-21df_abs23:16:331
179950,0migration/127711-21kthreadcore20:01:361
179950,0migration/116123-21missed_timers22:41:381
179950,0migration/110727-21munin-node23:41:321
169950,0watchdog/116664-21unixbench-2d23:01:411
149950,0migration/08519-21needreboot21:36:380
149950,0migration/05965-21irqrtprio19:46:360
149950,0migration/05595-21kthreadcore22:36:350
149950,0migration/04346-21kthreadcore00:16:370
149950,0migration/031071-21kthreadcore21:11:370
149950,0migration/03028-21fschecks_count22:56:330
149950,0migration/02998-21gltestperf23:36:320
149950,0migration/028843-21kthreadcore23:31:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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