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2026-04-12 - 10:13

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Apr 12, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
338021560sleep13129650irq/29-eth0_g0_22:29:151
121850ksoftirqd/111472chrt00:29:540
121800ksoftirqd/13129750irq/30-eth0_g0_22:06:090
144972740sleep13129750irq/30-eth0_g0_20:59:401
121690ksoftirqd/13129750irq/30-eth0_g0_00:07:560
42132680chrt3129750irq/30-eth0_g0_22:29:431
146352580sleep13129750irq/30-eth0_g0_23:14:311
5152560sleep03129750irq/30-eth0_g0_22:14:450
17912530sleep03129750irq/30-eth0_g0_22:20:100
17912530sleep03129750irq/30-eth0_g0_22:20:100
121520ksoftirqd/13129750irq/30-eth0_g0_23:10:311
121520ksoftirqd/13129750irq/30-eth0_g0_21:46:541
121510ksoftirqd/13129750irq/30-eth0_g0_23:40:201
121510ksoftirqd/13129750irq/30-eth0_g0_21:38:001
121510ksoftirqd/13129650irq/29-eth0_g0_23:03:540
121490ksoftirqd/13129750irq/30-eth0_g0_00:04:401
121480ksoftirqd/13129650irq/29-eth0_g0_23:48:121
121470ksoftirqd/13129750irq/30-eth0_g0_23:38:371
8262460sleep13129650irq/29-eth0_g0_22:18:231
327092460sleep13129750irq/30-eth0_g0_00:28:541
3129750460irq/30-eth0_g0_19301-21latencyplot19:09:181
43992450chrt3129750irq/30-eth0_g0_22:31:540
121450ksoftirqd/13129750irq/30-eth0_g0_23:05:151
121450ksoftirqd/13129650irq/29-eth0_g0_21:29:011
121450ksoftirqd/13129650irq/29-eth0_g0_00:37:541
3129650440irq/29-eth0_g0_32324-21unixbench_singl00:24:410
3129650440irq/29-eth0_g0_18738-21timerandwakeup19:04:390
142552440sleep03129650irq/29-eth0_g0_23:12:490
3129750430irq/30-eth0_g0_7802-21unixbench_multi22:44:411
3129750430irq/30-eth0_g0_31295-21kworker/1:123:27:101
121430ksoftirqd/13129650irq/29-eth0_g0_21:55:301
799420migration/021885-21unixbench_singl21:29:410
3129650420irq/29-eth0_g0_31ksoftirqd/021:43:180
3129650420irq/29-eth0_g0_13-21kworker/0:121:46:030
3129650420irq/29-eth0_g0_121ksoftirqd/122:39:321
3129650420irq/29-eth0_g0_0-21swapper/022:14:190
1930599421cyclictest32257-21grep19:59:391
121420ksoftirqd/13129750irq/30-eth0_g0_19:49:300
121420ksoftirqd/13129650irq/29-eth0_g0_23:19:401
121420ksoftirqd/13129650irq/29-eth0_g0_19:50:301
3129750410irq/30-eth0_g0_30993-21seq22:09:221
3129650410irq/29-eth0_g0_31ksoftirqd/019:44:190
3129650410irq/29-eth0_g0_22972-21latency_hist23:49:190
3129650410irq/29-eth0_g0_13-21kworker/0:123:33:210
3129650410irq/29-eth0_g0_13-21kworker/0:122:54:390
3129650410irq/29-eth0_g0_13-21kworker/0:121:28:420
3129650410irq/29-eth0_g0_13-21kworker/0:100:35:210
1930599411cyclictest24340-21head21:39:411
121410ksoftirqd/13129750irq/30-eth0_g0_23:58:350
3129750400irq/30-eth0_g0_31295-21kworker/1:122:59:371
3129750400irq/30-eth0_g0_31295-21kworker/1:100:33:341
3129750400irq/30-eth0_g0_19287-21munin-run23:34:181
3129750400irq/30-eth0_g0_0-21swapper/120:13:581
3129650400irq/29-eth0_g0_31101-21uptime19:54:420
3129650400irq/29-eth0_g0_2316-21df22:24:280
3129650400irq/29-eth0_g0_15009-21/usr/sbin/munin23:14:390
3129650400irq/29-eth0_g0_13-21kworker/0:123:27:260
3129650400irq/29-eth0_g0_13-21kworker/0:121:37:120
3129650400irq/29-eth0_g0_13-21kworker/0:100:19:450
3129650400irq/29-eth0_g0_13-21kworker/0:100:00:340
3129750390irq/30-eth0_g0_31295-21kworker/1:121:24:001
3129750390irq/30-eth0_g0_31ksoftirqd/000:14:030
3129750390irq/30-eth0_g0_121ksoftirqd/121:30:531
3129750390irq/30-eth0_g0_121ksoftirqd/121:11:251
3129750390irq/30-eth0_g0_121ksoftirqd/100:23:491
3129650390irq/29-eth0_g0_4959-21latency22:34:340
3129650390irq/29-eth0_g0_31ksoftirqd/021:57:010
3129650390irq/29-eth0_g0_31ksoftirqd/021:18:280
3129650390irq/29-eth0_g0_31ksoftirqd/021:18:280
3129650390irq/29-eth0_g0_294472sleep122:01:341
3129650390irq/29-eth0_g0_26234-21df_abs21:49:310
3129650390irq/29-eth0_g0_26234-21df_abs21:49:310
3129650390irq/29-eth0_g0_13-21kworker/0:100:15:120
3129650390irq/29-eth0_g0_12330-21cat23:04:350
3129650390irq/29-eth0_g0_121ksoftirqd/122:06:521
1930599391cyclictest31049-21grep19:54:411
1930599391cyclictest24903-21grep23:54:411
121390ksoftirqd/13129750irq/30-eth0_g0_23:50:140
121390ksoftirqd/13129750irq/30-eth0_g0_20:31:410
121390ksoftirqd/13129750irq/30-eth0_g0_20:28:590
121390ksoftirqd/13129750irq/30-eth0_g0_20:18:080
121390ksoftirqd/13129750irq/30-eth0_g0_20:01:390
121390ksoftirqd/13129750irq/30-eth0_g0_19:14:340
121390ksoftirqd/13129750irq/30-eth0_g0_19:11:310
121390ksoftirqd/13129650irq/29-eth0_g0_20:08:051
3129750380irq/30-eth0_g0_31295-21kworker/1:122:56:271
3129750380irq/30-eth0_g0_121ksoftirqd/123:52:141
3129750380irq/30-eth0_g0_121ksoftirqd/121:15:081
3129750380irq/30-eth0_g0_121ksoftirqd/121:15:081
3129750380irq/30-eth0_g0_121ksoftirqd/100:09:471
3129650380irq/29-eth0_g0_1831-21if_eth020:09:320
3129650380irq/29-eth0_g0_16276-21latency_hist21:09:190
3129650380irq/29-eth0_g0_13-21kworker/0:123:41:180
3129650380irq/29-eth0_g0_13-21kworker/0:123:22:360
3129650380irq/29-eth0_g0_13-21kworker/0:122:00:440
3129650380irq/29-eth0_g0_13-21kworker/0:121:20:460
3129650380irq/29-eth0_g0_13-21kworker/0:121:12:350
3129650380irq/29-eth0_g0_121ksoftirqd/123:37:150
3129650380irq/29-eth0_g0_121ksoftirqd/121:51:061
3129650380irq/29-eth0_g0_121ksoftirqd/121:51:061
3129650380irq/29-eth0_g0_121ksoftirqd/100:14:291
121380ksoftirqd/13129750irq/30-eth0_g0_20:20:000
121380ksoftirqd/13129650irq/29-eth0_g0_21:05:151
121380ksoftirqd/13129650irq/29-eth0_g0_20:23:251
121380ksoftirqd/13129650irq/29-eth0_g0_19:46:591
3129750370irq/30-eth0_g0_31295-21kworker/1:100:01:381
3129750370irq/30-eth0_g0_0-21swapper/122:51:321
3129650370irq/29-eth0_g0_9603-21unixbench_multi20:39:400
3129650370irq/29-eth0_g0_31ksoftirqd/022:46:020
3129650370irq/29-eth0_g0_13-21kworker/0:122:39:500
3129650370irq/29-eth0_g0_0-21swapper/020:49:350
1930599372cyclictest5324-21unixbench_multi22:34:411
19305993710cyclictest25443-21latency_hist19:34:191
1930599371cyclictest6605-21sed20:29:321
1930599371cyclictest26799-21sed19:39:301
3129650360irq/29-eth0_g0_8606-21cat22:49:340
3129650360irq/29-eth0_g0_8044-21load20:34:350
3129650360irq/29-eth0_g0_1875-21runrttasks19:34:130
3129650360irq/29-eth0_g0_0-21swapper/020:44:410
1930599361cyclictest24222-21latency_hist19:29:191
1930599361cyclictest1687-21grep22:19:401
1930599361cyclictest1687-21grep22:19:401
1930599361cyclictest10474-21sort20:44:351
3129750350irq/30-eth0_g0_8138-21ntp_kernel_err20:34:361
3129650350irq/29-eth0_g0_849-21proc_pri20:04:380
3129650350irq/29-eth0_g0_28012-21/usr/sbin/munin19:44:300
3129650350irq/29-eth0_g0_1875-21runrttasks21:00:340
3129650350irq/29-eth0_g0_1875-21runrttasks19:25:200
3129650350irq/29-eth0_g0_1875-21runrttasks19:19:480
1930599351cyclictest26161-21tail19:34:381
1930599351cyclictest22235-21ntp_states19:19:341
1930599351cyclictest21753-21cat19:19:191
1930599351cyclictest20083-21grep19:09:391
1930599351cyclictest12797-21taskset20:54:311
1930599351cyclictest11887-21proc_pri20:49:381
121350ksoftirqd/13129650irq/29-eth0_g0_20:43:501
3129650340irq/29-eth0_g0_26639-21munin-plugin-st19:39:190
3129650340irq/29-eth0_g0_13015-21/usr/sbin/munin20:54:350
1930599342cyclictest3161-21cat20:14:351
1930599331cyclictest0-21swapper/120:24:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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