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2026-09-22 - 10:57

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 highest latencies:
System rack3slot5s.osadl.org (updated Tue Sep 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2188421530sleep1121650irq/29-eth0_g0_21:34:091
3134221030sleep1121650irq/29-eth0_g0_00:25:201
2319621010sleep0121650irq/29-eth0_g0_21:40:080
121740ksoftirqd/1121750irq/30-eth0_g0_23:17:011
198552700sleep0121750irq/30-eth0_g0_21:25:290
186442670sleep1121750irq/30-eth0_g0_21:20:231
186442670sleep1121750irq/30-eth0_g0_21:20:231
221102650sleep1121750irq/30-eth0_g0_23:45:321
221102650sleep1121750irq/30-eth0_g0_23:45:321
236652530sleep0121650irq/29-eth0_g0_23:52:330
121520ksoftirqd/1121750irq/30-eth0_g0_00:31:110
121510ksoftirqd/1121750irq/30-eth0_g0_23:10:011
121650490irq/29-eth0_g0_31ksoftirqd/020:40:290
121490ksoftirqd/1121750irq/30-eth0_g0_23:29:291
121480ksoftirqd/1121650irq/29-eth0_g0_00:29:090
121750470irq/30-eth0_g0_1219-21kworker/1:222:28:161
121650470irq/29-eth0_g0_31ksoftirqd/019:55:340
83682460sleep1121750irq/30-eth0_g0_22:50:271
83682460sleep1121750irq/30-eth0_g0_22:50:271
121460ksoftirqd/1121650irq/29-eth0_g0_21:16:070
121450ksoftirqd/1121650irq/29-eth0_g0_22:10:301
121650440irq/29-eth0_g0_1964-21runrttasks20:04:430
121440ksoftirqd/1121650irq/29-eth0_g0_21:44:291
89172430sleep0121650irq/29-eth0_g0_22:52:100
89172430sleep0121650irq/29-eth0_g0_22:52:100
1759599431cyclictest30601-21unixbench_multi19:55:341
121750430irq/30-eth0_g0_1219-21kworker/1:200:34:011
121650430irq/29-eth0_g0_31ksoftirqd/023:57:000
121650430irq/29-eth0_g0_28725-21/usr/sbin/munin19:50:270
121650430irq/29-eth0_g0_28725-21/usr/sbin/munin19:50:270
121650430irq/29-eth0_g0_26575-21missed_timers19:40:250
121650430irq/29-eth0_g0_1964-21runrttasks23:27:480
121650430irq/29-eth0_g0_17137-21unixbench_singl19:00:300
121650430irq/29-eth0_g0_10961-21wc23:00:320
121430ksoftirqd/1121750irq/30-eth0_g0_23:20:291
121430ksoftirqd/1121650irq/29-eth0_g0_00:02:241
52822420sleep0121650irq/29-eth0_g0_22:37:390
121750420irq/30-eth0_g0_1219-21kworker/1:222:38:081
121650420irq/29-eth0_g0_31ksoftirqd/021:42:140
121650420irq/29-eth0_g0_13-21kworker/0:100:10:330
77862410sleep1121650irq/29-eth0_g0_22:48:171
121750410irq/30-eth0_g0_1219-21kworker/1:222:03:001
121750410irq/30-eth0_g0_1219-21kworker/1:221:06:551
121750410irq/30-eth0_g0_121ksoftirqd/123:01:141
121750410irq/30-eth0_g0_121ksoftirqd/121:45:221
121650410irq/29-eth0_g0_13-21kworker/0:123:05:230
121650410irq/29-eth0_g0_13-21kworker/0:122:34:280
121650410irq/29-eth0_g0_13-21kworker/0:121:47:480
121410ksoftirqd/1121650irq/29-eth0_g0_20:45:301
1759599401cyclictest21747-21awk19:20:271
1759599401cyclictest20764-21ps23:40:281
1759599401cyclictest16580-21grep21:10:311
121750400irq/30-eth0_g0_1219-21kworker/1:223:37:551
121750400irq/30-eth0_g0_1219-21kworker/1:222:15:231
121750400irq/30-eth0_g0_121ksoftirqd/119:15:291
121650400irq/29-eth0_g0_31ksoftirqd/019:35:250
121650400irq/29-eth0_g0_13-21kworker/0:123:42:260
121650400irq/29-eth0_g0_13-21kworker/0:122:56:380
121650400irq/29-eth0_g0_13-21kworker/0:122:47:080
121650400irq/29-eth0_g0_13-21kworker/0:122:41:220
121650400irq/29-eth0_g0_13-21kworker/0:122:10:190
121650400irq/29-eth0_g0_13-21kworker/0:121:58:490
121650400irq/29-eth0_g0_13-21kworker/0:121:10:550
121650400irq/29-eth0_g0_13-21kworker/0:100:18:390
121650400irq/29-eth0_g0_13-21kworker/0:100:08:410
121650400irq/29-eth0_g0_121ksoftirqd/120:55:271
121400ksoftirqd/1121750irq/30-eth0_g0_23:48:550
121400ksoftirqd/1121750irq/30-eth0_g0_23:48:550
121400ksoftirqd/1121650irq/29-eth0_g0_20:41:291
1759599391cyclictest969-21grep22:20:251
121750390irq/30-eth0_g0_1219-21kworker/1:222:40:381
121750390irq/30-eth0_g0_1219-21kworker/1:200:23:031
121750390irq/30-eth0_g0_121ksoftirqd/123:51:011
121650390irq/29-eth0_g0_31ksoftirqd/023:10:220
121650390irq/29-eth0_g0_1759499cyclictest22:28:320
121650390irq/29-eth0_g0_13-21kworker/0:122:23:350
121650390irq/29-eth0_g0_13-21kworker/0:122:17:380
121650390irq/29-eth0_g0_13-21kworker/0:122:04:530
121650390irq/29-eth0_g0_13-21kworker/0:121:51:190
121650390irq/29-eth0_g0_13-21kworker/0:121:34:550
121650390irq/29-eth0_g0_13-21kworker/0:100:01:190
121390ksoftirqd/1121650irq/29-eth0_g0_21:50:311
121390ksoftirqd/1121650irq/29-eth0_g0_20:30:311
121390ksoftirqd/1121650irq/29-eth0_g0_20:30:311
121390ksoftirqd/1121650irq/29-eth0_g0_20:16:321
121390ksoftirqd/1121650irq/29-eth0_g0_19:54:331
121390ksoftirqd/1121650irq/29-eth0_g0_19:54:331
121390ksoftirqd/1121650irq/29-eth0_g0_19:45:131
1759599382cyclictest23731-21wc19:30:101
1759599382cyclictest116832sleep120:50:311
1759599381cyclictest29582-21grep00:15:321
163262380sleep0121750irq/30-eth0_g0_23:22:450
121750380irq/30-eth0_g0_1219-21kworker/1:223:55:271
121750380irq/30-eth0_g0_1219-21kworker/1:221:17:561
121750380irq/30-eth0_g0_121ksoftirqd/122:56:481
121750380irq/30-eth0_g0_121ksoftirqd/100:05:111
121650380irq/29-eth0_g0_2994-21sendmail_mailtr20:15:300
121650380irq/29-eth0_g0_24118-21missed_timers19:30:260
121650380irq/29-eth0_g0_15007-21missed_timers21:05:260
121650380irq/29-eth0_g0_13-21kworker/0:123:30:430
121650380irq/29-eth0_g0_13-21kworker/0:123:19:530
121650380irq/29-eth0_g0_13-21kworker/0:122:06:120
121650380irq/29-eth0_g0_121ksoftirqd/122:32:501
121380ksoftirqd/1121650irq/29-eth0_g0_21:36:331
121380ksoftirqd/1121650irq/29-eth0_g0_21:03:531
121380ksoftirqd/1121650irq/29-eth0_g0_20:37:371
121380ksoftirqd/1121650irq/29-eth0_g0_20:25:401
121380ksoftirqd/1121650irq/29-eth0_g0_19:14:441
1759599377cyclictest121750irq/30-eth0_g0_00:10:541
1759599375cyclictest26239-21latency_hist19:40:111
1759599372cyclictest26670-21ntpq19:40:271
1759599371cyclictest245562sleep119:30:381
1759599371cyclictest13578-21grep23:10:321
121750370irq/30-eth0_g0_1219-21kworker/1:221:27:151
121750370irq/30-eth0_g0_121ksoftirqd/122:00:041
121650370irq/29-eth0_g0_1964-21runrttasks19:20:090
121650370irq/29-eth0_g0_194612sleep021:24:310
121650370irq/29-eth0_g0_194612sleep021:24:310
121650370irq/29-eth0_g0_19290-21taskset19:10:260
121650370irq/29-eth0_g0_18230-21ntpdc23:30:251
121650370irq/29-eth0_g0_13-21kworker/0:123:36:580
121650370irq/29-eth0_g0_13-21kworker/0:100:21:590
121370ksoftirqd/1121650irq/29-eth0_g0_22:05:321
121750360irq/30-eth0_g0_31870-21sed20:00:331
121650360irq/29-eth0_g0_1964-21runrttasks21:03:470
121650360irq/29-eth0_g0_1964-21runrttasks20:27:360
121650360irq/29-eth0_g0_1964-21runrttasks19:05:230
121650360irq/29-eth0_g0_17522-21runrttasks19:04:271
121360ksoftirqd/1121750irq/30-eth0_g0_20:30:210
121360ksoftirqd/1121750irq/30-eth0_g0_20:30:210
121360ksoftirqd/1121750irq/30-eth0_g0_20:07:190
121650350irq/29-eth0_g0_4219-21which20:20:300
121650350irq/29-eth0_g0_27901-21sh19:45:260
121650350irq/29-eth0_g0_1964-21runrttasks19:25:440
121650350irq/29-eth0_g0_0-21swapper/020:49:060
121350ksoftirqd/1121750irq/30-eth0_g0_20:52:150
42172348sleep14308-21grep20:20:311
1759599341cyclictest1519-21missed_timers20:10:261
1759599341cyclictest0-21swapper/120:06:201
1759599340cyclictest0-21swapper/119:08:151
121650340irq/29-eth0_g0_1964-21runrttasks20:59:100
121650340irq/29-eth0_g0_1964-21runrttasks20:38:470
121650330irq/29-eth0_g0_1193-21/usr/sbin/munin20:10:280
121650330irq/29-eth0_g0_0-21swapper/019:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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