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2026-04-09 - 07:48

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 792 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
3129650410irq/29-eth0_g0_13-21kworker/0:100:12:280
148132410sleep13129750irq/30-eth0_g0_22:15:131
121410ksoftirqd/13129750irq/30-eth0_g0_21:38:540
121410ksoftirqd/13129650irq/29-eth0_g0_22:21:271
3129750400irq/30-eth0_g0_121ksoftirqd/121:16:511
3129750400irq/30-eth0_g0_121ksoftirqd/100:26:471
3129750400irq/30-eth0_g0_121ksoftirqd/100:20:101
3129650400irq/29-eth0_g0_13-21kworker/0:123:40:080
3129650400irq/29-eth0_g0_13-21kworker/0:121:56:260
3129650400irq/29-eth0_g0_13-21kworker/0:121:56:260
121400ksoftirqd/13129750irq/30-eth0_g0_23:26:570
121400ksoftirqd/13129750irq/30-eth0_g0_21:49:140
121400ksoftirqd/13129750irq/30-eth0_g0_19:44:410
121400ksoftirqd/13129750irq/30-eth0_g0_19:31:080
121400ksoftirqd/13129750irq/30-eth0_g0_19:22:240
121400ksoftirqd/13129650irq/29-eth0_g0_22:44:111
3129750390irq/30-eth0_g0_22352-21awk20:34:411
3129750390irq/30-eth0_g0_121ksoftirqd/122:56:321
3129750390irq/30-eth0_g0_0-21swapper/121:31:121
3129650390irq/29-eth0_g0_31ksoftirqd/000:34:410
3129650390irq/29-eth0_g0_13-21kworker/0:123:50:200
3129650390irq/29-eth0_g0_13-21kworker/0:121:42:380
121390ksoftirqd/13129750irq/30-eth0_g0_23:19:020
121390ksoftirqd/13129750irq/30-eth0_g0_23:02:240
121390ksoftirqd/13129750irq/30-eth0_g0_22:54:370
121390ksoftirqd/13129750irq/30-eth0_g0_22:49:320
121390ksoftirqd/13129750irq/30-eth0_g0_22:47:410
121390ksoftirqd/13129750irq/30-eth0_g0_22:38:240
121390ksoftirqd/13129750irq/30-eth0_g0_22:19:490
121390ksoftirqd/13129750irq/30-eth0_g0_22:16:310
121390ksoftirqd/13129750irq/30-eth0_g0_22:13:220
121390ksoftirqd/13129750irq/30-eth0_g0_21:30:400
121390ksoftirqd/13129750irq/30-eth0_g0_21:15:170
121390ksoftirqd/13129750irq/30-eth0_g0_21:10:490
121390ksoftirqd/13129750irq/30-eth0_g0_21:09:230
121390ksoftirqd/13129750irq/30-eth0_g0_21:09:230
121390ksoftirqd/13129750irq/30-eth0_g0_21:00:580
121390ksoftirqd/13129750irq/30-eth0_g0_20:54:540
121390ksoftirqd/13129750irq/30-eth0_g0_20:50:390
121390ksoftirqd/13129750irq/30-eth0_g0_20:43:020
121390ksoftirqd/13129750irq/30-eth0_g0_20:30:340
121390ksoftirqd/13129750irq/30-eth0_g0_20:24:540
121390ksoftirqd/13129750irq/30-eth0_g0_20:13:530
121390ksoftirqd/13129750irq/30-eth0_g0_00:32:200
121390ksoftirqd/13129750irq/30-eth0_g0_00:32:200
121390ksoftirqd/13129750irq/30-eth0_g0_00:05:330
121390ksoftirqd/13129650irq/29-eth0_g0_21:08:411
121390ksoftirqd/13129650irq/29-eth0_g0_21:08:411
1066993910cyclictest22578-21latency_hist22:49:261
106699391cyclictest17168-21head22:24:491
3129750380irq/30-eth0_g0_64832sleep119:29:421
3129750380irq/30-eth0_g0_31295-21kworker/1:123:53:251
3129750380irq/30-eth0_g0_31295-21kworker/1:122:37:271
3129750380irq/30-eth0_g0_31295-21kworker/1:100:04:341
3129750380irq/30-eth0_g0_121ksoftirqd/122:29:541
3129750380irq/30-eth0_g0_121ksoftirqd/122:09:031
3129750380irq/30-eth0_g0_106699cyclictest21:19:481
3129650380irq/29-eth0_g0_31ksoftirqd/022:04:370
3129650380irq/29-eth0_g0_22553-21wc20:34:450
3129650380irq/29-eth0_g0_13-21kworker/0:122:25:200
3129650380irq/29-eth0_g0_13-21kworker/0:121:25:460
3129650380irq/29-eth0_g0_13-21kworker/0:121:25:460
28292380sleep03129650irq/29-eth0_g0_19:14:430
121380ksoftirqd/13129750irq/30-eth0_g0_00:14:280
121380ksoftirqd/13129650irq/29-eth0_g0_23:05:111
121380ksoftirqd/13129650irq/29-eth0_g0_20:24:411
106699389cyclictest0-21swapper/123:40:541
106699382cyclictest12588-21ntp_states19:54:421
3129750370irq/30-eth0_g0_31295-21kworker/1:123:13:401
3129750370irq/30-eth0_g0_31295-21kworker/1:121:39:301
3129750370irq/30-eth0_g0_10753-21ntpdc21:59:421
3129750370irq/30-eth0_g0_0-21swapper/123:30:551
3129750370irq/30-eth0_g0_0-21swapper/100:11:501
3129650370irq/29-eth0_g0_14559-21latency_hist20:04:260
3129650370irq/29-eth0_g0_13-21kworker/0:122:41:010
3129650370irq/29-eth0_g0_0-21swapper/020:44:330
121370ksoftirqd/11063-21munin-run19:09:251
121370ksoftirqd/11063-21munin-run19:09:251
106699371cyclictest21403-21grep20:29:461
3129650360irq/29-eth0_g0_7438-21sed19:34:380
3129650360irq/29-eth0_g0_5324-21/usr/sbin/munin19:24:440
3129650360irq/29-eth0_g0_17549-21ps20:14:440
3129650360irq/29-eth0_g0_11348-21ntpdc19:49:400
106699362cyclictest0-21swapper/119:39:361
106699361cyclictest261022sleep120:49:431
106699361cyclictest13972-21sendmail_mailtr19:59:451
106699361cyclictest100742sleep119:44:411
3129650350irq/29-eth0_g0_16799-21runrttasks20:12:101
121350ksoftirqd/13129750irq/30-eth0_g0_20:22:340
121350ksoftirqd/13129750irq/30-eth0_g0_20:22:340
106699351cyclictest23847-21tail20:39:461
3129650340irq/29-eth0_g0_1875-21runrttasks19:40:480
121340ksoftirqd/13129650irq/29-eth0_g0_19:19:461
106699341cyclictest7305-21/usr/sbin/munin19:34:421
106699341cyclictest25082-21grep20:44:451
106699341cyclictest176442sleep120:14:451
106699340cyclictest0-21swapper/120:59:411
106699331cyclictest14935-21chrt20:04:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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