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2026-09-19 - 10:26

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 Sat Sep 19, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450550,0irq/25-eth10-21swapper/318:42:103
2035223526,0sleep20-21swapper/218:39:082
2066223423,0sleep00-21swapper/018:42:470
2054723422,0sleep10-21swapper/118:41:231
207989983,0cyclictest8852-21awk23:18:430
207989983,0cyclictest20175-21awk21:03:440
207989983,0cyclictest19964-21awk21:23:440
207989983,0cyclictest16352-21awk23:43:440
207989982,0cyclictest23944-21irqrtprio00:08:480
207989975,0cyclictest0-21swapper/021:57:330
207989973,0cyclictest3556-21lldpd20:51:430
207989973,0cyclictest3556-21lldpd19:08:400
207989973,0cyclictest29874-21ps19:13:460
207989972,0cyclictest9535-21munin-node19:23:430
207989972,0cyclictest7776-21awk23:58:450
207989972,0cyclictest2820-21awk18:53:440
207989972,0cyclictest2053-21cut23:33:460
207989972,0cyclictest17893-21awk22:43:450
207989971,0cyclictest19054-21awk20:18:460
207989971,0cyclictest16638-21unixbench_singl21:38:540
207989971,0cyclictest0-21swapper/022:13:450
207989971,0cyclictest0-21swapper/018:52:540
207989970,0cyclictest9635-21sh22:18:400
207989970,0cyclictest7799-21sh22:35:460
207989970,0cyclictest7799-21sh22:35:460
207989970,0cyclictest7647-21kthreadcore21:13:480
207989970,0cyclictest5933-21kthreadcore19:18:470
207989970,0cyclictest4826-21munin-node20:08:440
207989970,0cyclictest4779-21sendmail_mailqu20:28:520
207989970,0cyclictest3872-21munin-node19:43:540
207989970,0cyclictest32323-21rm23:13:360
207989970,0cyclictest29591-21munin-node19:38:490
207989970,0cyclictest29356-21munin-node19:58:490
207989970,0cyclictest27802-21df_abs21:08:440
207989970,0cyclictest25196-21sh22:07:120
207989970,0cyclictest16828-21diskstats23:03:420
207989970,0cyclictest11561-21diskstats20:58:410
207989970,0cyclictest0-21swapper/020:53:460
339960,0migration/35513-21sh23:55:183
339960,0migration/319435-21kthreadcore22:23:453
339960,0migration/317064-21sh21:40:023
29725060,0irq/27-eth0-tx-11069-21munin-node21:18:502
29715060,0irq/26-eth0-rx-30196-21python23:08:533
29715060,0irq/26-eth0-rx-0-21swapper/321:18:463
29715060,0irq/26-eth0-rx-0-21swapper/320:23:473
207999966,0cyclictest18928-21diskmemload21:58:161
207989961,0cyclictest30653-21awk20:03:410
207989960,0cyclictest9969-21sed21:58:300
207989960,0cyclictest8945-21rm22:38:310
207989960,0cyclictest8455-21ssh22:58:360
207989960,0cyclictest7401-21sh23:38:330
207989960,0cyclictest32738-21wc22:53:300
207989960,0cyclictest31192-21date23:53:290
207989960,0cyclictest26842-21cat21:28:300
207989960,0cyclictest2649-21aten2.4-expect21:33:410
207989960,0cyclictest26341-21ls21:48:300
207989960,0cyclictest26049-21aten_r1power_vo22:08:410
207989960,0cyclictest25514-21grep20:23:430
207989960,0cyclictest25326-21sh22:28:360
207989960,0cyclictest24845-21sh22:48:320
207989960,0cyclictest24558-21aten_r1power_vo23:08:430
207989960,0cyclictest24144-21munin-node23:28:420
207989960,0cyclictest23623-21tr23:48:420
207989960,0cyclictest22876-21grep19:33:300
207989960,0cyclictest21140-21aten_r1power_vo18:43:420
207989960,0cyclictest19170-21munin-node20:43:420
207989960,0cyclictest18580-21aten_r1power_fr21:43:420
207989960,0cyclictest17624-21munin-node19:53:420
207989960,0cyclictest17497-21aten_r1power_po22:23:400
207989960,0cyclictest16257-21cut19:28:400
207989960,0cyclictest15978-21munin-node23:23:410
207989960,0cyclictest15294-21aten_r1power_cu19:03:400
207989960,0cyclictest14800-21sh00:03:400
207989960,0cyclictest12491-21latency_hist20:38:300
207989960,0cyclictest11451-21grep20:13:300
207989960,0cyclictest11137-21munin-node21:18:410
207989960,0cyclictest10781-21egrep19:48:420
207989960,0cyclictest0-21swapper/020:33:300
207989960,0cyclictest0-21swapper/018:58:430
8215050,0irq/24-0000:00:26193-21idleruntime-cro21:48:302
339950,0migration/3885-21kthreadcore23:33:453
339950,0migration/38574-21sh22:38:053
339950,0migration/38574-21sh22:38:053
339950,0migration/38231-21kthreadcore19:43:483
339950,0migration/38202-21taskset18:56:023
339950,0migration/3616-21munin-node22:53:433
339950,0migration/34288-21munin-node21:13:463
339950,0migration/331969-21kthreadcore21:08:493
339950,0migration/331654-21taskset22:29:243
339950,0migration/331462-21latency_hist20:28:303
339950,0migration/330322-21kthreadcore21:28:463
339950,0migration/328963-21munin-node19:13:423
339950,0migration/328117-21taskset19:10:593
339950,0migration/327905-21gltestperf20:48:433
339950,0migration/324034-21aten_r1power_vo23:28:413
339950,0migration/322772-21aten_r1power_cu00:08:423
339950,0migration/320884-21kthreadcore21:43:473
339950,0migration/318993-21latency_hist21:23:303
339950,0migration/318414-21munin-node20:18:433
339950,0migration/317837-21kthreadcore23:03:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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