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2026-04-09 - 03:06

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 Apr 09, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121970ksoftirqd/13129750irq/30-eth0_g0_23:03:241
121810ksoftirqd/13129650irq/29-eth0_g0_20:09:260
121740ksoftirqd/13129750irq/30-eth0_g0_20:54:361
71562650sleep03129650irq/29-eth0_g0_23:58:260
55872580chrt3129750irq/30-eth0_g0_19:24:481
121540ksoftirqd/13129750irq/30-eth0_g0_23:20:441
76592530sleep13129750irq/30-eth0_g0_21:47:271
121520ksoftirqd/13129750irq/30-eth0_g0_23:36:141
121520ksoftirqd/13129750irq/30-eth0_g0_00:19:021
121500ksoftirqd/13129750irq/30-eth0_g0_21:28:251
121500ksoftirqd/13129750irq/30-eth0_g0_21:28:251
121490ksoftirqd/13129750irq/30-eth0_g0_23:25:271
121490ksoftirqd/13129750irq/30-eth0_g0_00:03:171
50212480sleep13129750irq/30-eth0_g0_21:35:161
121480ksoftirqd/13129750irq/30-eth0_g0_23:15:291
230142460sleep13129750irq/30-eth0_g0_22:49:431
121460ksoftirqd/13129750irq/30-eth0_g0_23:48:361
121460ksoftirqd/13129750irq/30-eth0_g0_23:48:361
121460ksoftirqd/13129650irq/29-eth0_g0_00:00:280
3129750440irq/30-eth0_g0_31295-21kworker/1:100:33:241
3129750440irq/30-eth0_g0_31295-21kworker/1:100:33:241
3129750440irq/30-eth0_g0_121ksoftirqd/121:54:441
3129750440irq/30-eth0_g0_121ksoftirqd/121:54:441
121440ksoftirqd/13129750irq/30-eth0_g0_22:31:330
121440ksoftirqd/13129750irq/30-eth0_g0_19:54:420
121440ksoftirqd/13129750irq/30-eth0_g0_00:19:420
121440ksoftirqd/13129650irq/29-eth0_g0_19:09:431
114232440sleep03129650irq/29-eth0_g0_22:03:320
3129750430irq/30-eth0_g0_6849-21taskset23:54:481
3129650430irq/29-eth0_g0_565-21unixbench_multi19:04:450
3129650430irq/29-eth0_g0_565-21unixbench_multi19:04:450
3129650430irq/29-eth0_g0_13-21kworker/0:123:29:440
121430ksoftirqd/13129750irq/30-eth0_g0_23:39:170
121430ksoftirqd/13129650irq/29-eth0_g0_00:38:551
106699432cyclictest2469-21df19:14:371
314392420sleep13129750irq/30-eth0_g0_21:11:431
3129750420irq/30-eth0_g0_31295-21kworker/1:122:13:301
3129650420irq/29-eth0_g0_31ksoftirqd/019:10:460
3129650420irq/29-eth0_g0_121ksoftirqd/123:08:320
121420ksoftirqd/13129650irq/29-eth0_g0_20:21:041
121420ksoftirqd/13129650irq/29-eth0_g0_20:21:041
121420ksoftirqd/13129650irq/29-eth0_g0_19:49:381
3129750410irq/30-eth0_g0_8159-21irqstats21:49:401
3129650410irq/29-eth0_g0_31ksoftirqd/021:54:140
3129650410irq/29-eth0_g0_13-21kworker/0:123:46:100
3129650410irq/29-eth0_g0_13-21kworker/0:123:46:100
3129650410irq/29-eth0_g0_13-21kworker/0:123:19:430
3129650410irq/29-eth0_g0_13-21kworker/0:123:13:170
3129650410irq/29-eth0_g0_13-21kworker/0:121:20:560
3129650410irq/29-eth0_g0_13-21kworker/0:100:25:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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