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2026-08-10 - 22:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #5

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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  Eltec
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot5s.osadl.org (updated Mon Aug 10, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1272421090sleep1121750irq/30-eth0_g0_11:57:341
121870ksoftirqd/1121750irq/30-eth0_g0_12:12:221
121870ksoftirqd/1121750irq/30-eth0_g0_12:12:221
121820ksoftirqd/1121750irq/30-eth0_g0_11:18:450
121680ksoftirqd/1121750irq/30-eth0_g0_11:42:041
5302620sleep1121750irq/30-eth0_g0_11:08:341
5302620sleep1121750irq/30-eth0_g0_11:08:341
202862580sleep1121750irq/30-eth0_g0_10:17:061
167582570sleep1121750irq/30-eth0_g0_10:02:101
167582570sleep1121750irq/30-eth0_g0_10:02:101
121530ksoftirqd/1121750irq/30-eth0_g0_11:36:241
177092510chrt121650irq/29-eth0_g0_12:18:411
121490ksoftirqd/1121750irq/30-eth0_g0_10:59:591
121480ksoftirqd/1121750irq/30-eth0_g0_12:06:341
121480ksoftirqd/1121750irq/30-eth0_g0_10:22:261
121480ksoftirqd/1121750irq/30-eth0_g0_10:22:261
121480ksoftirqd/1121650irq/29-eth0_g0_11:57:330
121480ksoftirqd/1121650irq/29-eth0_g0_11:50:190
121480ksoftirqd/1121650irq/29-eth0_g0_11:50:190
121480ksoftirqd/1121650irq/29-eth0_g0_11:42:060
111152480sleep0121650irq/29-eth0_g0_07:27:060
121470ksoftirqd/1121650irq/29-eth0_g0_09:27:351
116282470sleep0121650irq/29-eth0_g0_11:54:050
121460ksoftirqd/1121750irq/30-eth0_g0_11:50:031
121460ksoftirqd/1121750irq/30-eth0_g0_11:50:031
121460ksoftirqd/1121650irq/29-eth0_g0_09:26:131
121450ksoftirqd/1121750irq/30-eth0_g0_10:47:351
121450ksoftirqd/1121650irq/29-eth0_g0_10:14:041
121650440irq/29-eth0_g0_1964-21runrttasks10:33:320
121440ksoftirqd/1121650irq/29-eth0_g0_10:28:141
121750430irq/30-eth0_g0_1219-21kworker/1:212:34:001
121750430irq/30-eth0_g0_1219-21kworker/1:211:40:411
121650430irq/29-eth0_g0_31ksoftirqd/009:38:380
121430ksoftirqd/1121650irq/29-eth0_g0_12:21:160
121430ksoftirqd/1121650irq/29-eth0_g0_09:56:521
121430ksoftirqd/1121650irq/29-eth0_g0_09:33:330
121750420irq/30-eth0_g0_1219-21kworker/1:209:11:221
121650420irq/29-eth0_g0_5283-21unixbench_singl07:02:110
121650420irq/29-eth0_g0_30815-21latency_hist11:01:500
121650420irq/29-eth0_g0_2667-21diskmemload11:37:020
121650420irq/29-eth0_g0_13-21kworker/0:110:37:050
121420ksoftirqd/1121650irq/29-eth0_g0_12:30:391
121420ksoftirqd/1121650irq/29-eth0_g0_08:57:101
575099411cyclictest18580-21processes12:22:101
121750410irq/30-eth0_g0_294832sleep110:55:321
121750410irq/30-eth0_g0_1219-21kworker/1:211:26:291
121650410irq/29-eth0_g0_31ksoftirqd/012:07:170
121650410irq/29-eth0_g0_31ksoftirqd/009:22:010
121650410irq/29-eth0_g0_25932-21sendmail_mailqu08:27:110
121650410irq/29-eth0_g0_13-21kworker/0:111:29:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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