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2026-07-16 - 04:21

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 100 highest latencies:
System rack3slot5s.osadl.org (updated Thu Jul 16, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121880ksoftirqd/1121750irq/30-eth0_g0_00:10:041
121860ksoftirqd/1121750irq/30-eth0_g0_19:38:161
161752840sleep0121650irq/29-eth0_g0_22:23:190
121830ksoftirqd/1121750irq/30-eth0_g0_00:05:201
121820ksoftirqd/1121650irq/29-eth0_g0_22:15:340
121810ksoftirqd/1121750irq/30-eth0_g0_23:47:451
121800ksoftirqd/1121750irq/30-eth0_g0_23:09:091
121790ksoftirqd/1121650irq/29-eth0_g0_20:32:500
121720ksoftirqd/1121750irq/30-eth0_g0_22:00:181
121710ksoftirqd/1121750irq/30-eth0_g0_22:25:411
121690ksoftirqd/1249642chrt23:00:510
121690ksoftirqd/1249642chrt23:00:510
119572690sleep1121650irq/29-eth0_g0_00:18:481
3232580sleep0121650irq/29-eth0_g0_19:08:060
5462530sleep0121650irq/29-eth0_g0_21:22:010
121530ksoftirqd/1121750irq/30-eth0_g0_21:13:541
121520ksoftirqd/1121750irq/30-eth0_g0_22:12:031
121520ksoftirqd/1121650irq/29-eth0_g0_21:55:440
145762500sleep1121750irq/30-eth0_g0_22:18:061
121490ksoftirqd/1121650irq/29-eth0_g0_23:19:280
121460ksoftirqd/1121750irq/30-eth0_g0_00:16:361
121650450irq/29-eth0_g0_10779-21chrt22:03:040
121650450irq/29-eth0_g0_10779-21chrt22:03:040
121450ksoftirqd/1121750irq/30-eth0_g0_23:51:551
235662440sleep0121650irq/29-eth0_g0_22:53:510
121750440irq/30-eth0_g0_304822sleep121:11:151
121750440irq/30-eth0_g0_304822sleep121:11:151
121650440irq/29-eth0_g0_31ksoftirqd/000:23:050
121650440irq/29-eth0_g0_1964-21runrttasks22:43:410
121650440irq/29-eth0_g0_0-21swapper/019:43:110
121650440irq/29-eth0_g0_0-21swapper/019:43:110
121440ksoftirqd/1121750irq/30-eth0_g0_22:52:131
121440ksoftirqd/1121650irq/29-eth0_g0_23:55:300
121440ksoftirqd/1121650irq/29-eth0_g0_21:33:161
121750430irq/30-eth0_g0_1219-21kworker/1:223:42:501
121750430irq/30-eth0_g0_1219-21kworker/1:223:02:511
121750430irq/30-eth0_g0_1219-21kworker/1:223:02:511
121650430irq/29-eth0_g0_1964-21runrttasks21:38:010
121650430irq/29-eth0_g0_1219-21kworker/1:221:38:051
121430ksoftirqd/1121750irq/30-eth0_g0_22:56:301
121430ksoftirqd/1121650irq/29-eth0_g0_21:30:090
121430ksoftirqd/1121650irq/29-eth0_g0_19:32:471
121750420irq/30-eth0_g0_1219-21kworker/1:222:33:251
121750420irq/30-eth0_g0_1219-21kworker/1:221:50:501
121750420irq/30-eth0_g0_1219-21kworker/1:200:35:441
121650420irq/29-eth0_g0_13-21kworker/0:121:16:170
121420ksoftirqd/1121650irq/29-eth0_g0_21:25:121
121650410irq/29-eth0_g0_31508-21chrt19:03:050
121650410irq/29-eth0_g0_31ksoftirqd/023:49:130
116002410sleep1121750irq/30-eth0_g0_22:07:041
116002410sleep1121750irq/30-eth0_g0_22:07:041
3246099401cyclictest13564-21wc22:13:111
121750400irq/30-eth0_g0_1219-21kworker/1:222:44:211
121750400irq/30-eth0_g0_1219-21kworker/1:221:21:501
121750400irq/30-eth0_g0_1219-21kworker/1:200:28:371
121650400irq/29-eth0_g0_31ksoftirqd/023:13:110
121650400irq/29-eth0_g0_293931sh21:07:510
121650400irq/29-eth0_g0_13-21kworker/0:122:29:350
121650400irq/29-eth0_g0_12908-21wc19:58:110
121400ksoftirqd/1121750irq/30-eth0_g0_00:21:470
3246099392cyclictest5126-21sed23:53:001
3246099391cyclictest82212sleep121:53:031
121750390irq/30-eth0_g0_121ksoftirqd/123:28:061
121750390irq/30-eth0_g0_121ksoftirqd/123:28:061
121750390irq/30-eth0_g0_121ksoftirqd/121:28:261
121650390irq/29-eth0_g0_31ksoftirqd/023:36:090
121650390irq/29-eth0_g0_31ksoftirqd/023:03:510
121650390irq/29-eth0_g0_31ksoftirqd/021:35:090
121650390irq/29-eth0_g0_31ksoftirqd/021:11:430
121650390irq/29-eth0_g0_31ksoftirqd/021:11:430
121650390irq/29-eth0_g0_13-21kworker/0:100:35:340
121650390irq/29-eth0_g0_13-21kworker/0:100:28:070
121650390irq/29-eth0_g0_13-21kworker/0:100:15:420
121650390irq/29-eth0_g0_12028-21latency22:08:060
121650390irq/29-eth0_g0_121ksoftirqd/121:44:320
121650390irq/29-eth0_g0_121ksoftirqd/121:44:320
121390ksoftirqd/1121750irq/30-eth0_g0_23:09:130
121390ksoftirqd/1121750irq/30-eth0_g0_22:41:520
121390ksoftirqd/1121750irq/30-eth0_g0_21:00:010
121390ksoftirqd/1121750irq/30-eth0_g0_20:49:570
121390ksoftirqd/1121650irq/29-eth0_g0_23:22:391
3246099382cyclictest17688-21/usr/sbin/munin20:18:081
3246099381cyclictest28145-21proc_pri23:13:101
3246099381cyclictest113832sleep119:53:041
121750380irq/30-eth0_g0_1219-21kworker/1:223:26:041
121750380irq/30-eth0_g0_1219-21kworker/1:222:30:471
121750380irq/30-eth0_g0_1219-21kworker/1:221:43:471
121750380irq/30-eth0_g0_1219-21kworker/1:221:43:471
121750380irq/30-eth0_g0_121ksoftirqd/122:38:181
121650380irq/29-eth0_g0_30730-21wc23:23:130
121650380irq/29-eth0_g0_1964-21runrttasks20:46:510
121650380irq/29-eth0_g0_1964-21runrttasks20:24:560
121650380irq/29-eth0_g0_1964-21runrttasks20:20:130
121650380irq/29-eth0_g0_1964-21runrttasks20:07:420
121650380irq/29-eth0_g0_13-21kworker/0:123:40:090
121650380irq/29-eth0_g0_13-21kworker/0:122:18:390
121650380irq/29-eth0_g0_13-21kworker/0:100:10:030
121650380irq/29-eth0_g0_13-21kworker/0:100:03:480
121380ksoftirqd/1121650irq/29-eth0_g0_20:44:541
121380ksoftirqd/1121650irq/29-eth0_g0_20:08:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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