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2026-01-08 - 13:48

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 Thu Jan 08, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2138421410sleep1121650irq/29-eth0_g0_11:12:551
3116621220sleep1121650irq/29-eth0_g0_11:52:301
43352770sleep1121750irq/30-eth0_g0_10:00:101
121760ksoftirqd/1121750irq/30-eth0_g0_10:40:161
6742700sleep0121650irq/29-eth0_g0_09:42:350
121690ksoftirqd/1121750irq/30-eth0_g0_09:33:180
121610ksoftirqd/1121750irq/30-eth0_g0_07:25:201
85172530sleep1121650irq/29-eth0_g0_10:16:521
121530ksoftirqd/1121750irq/30-eth0_g0_11:21:271
121530ksoftirqd/1121750irq/30-eth0_g0_10:13:151
121520ksoftirqd/1121750irq/30-eth0_g0_12:34:291
121510ksoftirqd/1121650irq/29-eth0_g0_12:35:131
121500ksoftirqd/1121750irq/30-eth0_g0_12:07:481
121500ksoftirqd/1121650irq/29-eth0_g0_12:38:240
121500ksoftirqd/1121650irq/29-eth0_g0_12:26:110
121490ksoftirqd/1121650irq/29-eth0_g0_11:32:420
121480ksoftirqd/1121750irq/30-eth0_g0_12:10:140
121480ksoftirqd/1121750irq/30-eth0_g0_12:06:580
121480ksoftirqd/1121650irq/29-eth0_g0_10:28:520
121650470irq/29-eth0_g0_0-21swapper/007:09:590
280442460sleep1121750irq/30-eth0_g0_09:20:341
19522460sleep1121750irq/30-eth0_g0_09:47:521
121460ksoftirqd/1121650irq/29-eth0_g0_12:32:040
121460ksoftirqd/1121650irq/29-eth0_g0_11:47:280
121750450irq/30-eth0_g0_470-21kworker/1:110:06:331
276022440sleep0121650irq/29-eth0_g0_11:38:530
121650440irq/29-eth0_g0_16239-21/usr/sbin/munin08:35:090
121440ksoftirqd/1121750irq/30-eth0_g0_11:23:590
121440ksoftirqd/1121650irq/29-eth0_g0_10:57:560
121440ksoftirqd/1121650irq/29-eth0_g0_10:57:560
121440ksoftirqd/1121650irq/29-eth0_g0_07:54:231
121440ksoftirqd/1121650irq/29-eth0_g0_07:54:231
121430ksoftirqd/1121650irq/29-eth0_g0_11:45:521
59782420sleep1121750irq/30-eth0_g0_12:20:581
59782420sleep1121750irq/30-eth0_g0_12:20:581
121750420irq/30-eth0_g0_470-21kworker/1:111:03:401
121420ksoftirqd/1121650irq/29-eth0_g0_09:42:291
121750410irq/30-eth0_g0_470-21kworker/1:110:28:561
121750410irq/30-eth0_g0_470-21kworker/1:110:20:131
121750410irq/30-eth0_g0_470-21kworker/1:109:53:001
121750410irq/30-eth0_g0_23524-21sort09:04:581
121750410irq/30-eth0_g0_121ksoftirqd/111:41:561
121650410irq/29-eth0_g0_6556-21grep07:50:190
121650410irq/29-eth0_g0_6556-21grep07:50:190
121650410irq/29-eth0_g0_31998-21rt-features11:55:170
121410ksoftirqd/1121650irq/29-eth0_g0_09:10:171
60402400sleep0121650irq/29-eth0_g0_12:21:420
60402400sleep0121650irq/29-eth0_g0_12:21:420
2843299402cyclictest31266-21memory09:35:131
186372400chrt18640-21unixbench_singl11:00:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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