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2026-04-11 - 08:54

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 Sat Apr 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
785421150sleep03129750irq/30-eth0_g0_00:35:280
121760ksoftirqd/13129750irq/30-eth0_g0_21:20:031
121690ksoftirqd/13129750irq/30-eth0_g0_23:49:171
121630ksoftirqd/13129750irq/30-eth0_g0_22:41:090
121620ksoftirqd/13129750irq/30-eth0_g0_00:03:510
121570ksoftirqd/13129750irq/30-eth0_g0_22:29:201
35542550sleep13129750irq/30-eth0_g0_22:06:281
9962520sleep03129650irq/29-eth0_g0_21:55:380
24461995220cyclictest24257-21vmstat23:29:451
2446199521cyclictest26438-21proc_pri23:39:381
121520ksoftirqd/13129750irq/30-eth0_g0_22:21:321
121520ksoftirqd/13129750irq/30-eth0_g0_22:21:321
121520ksoftirqd/13129750irq/30-eth0_g0_21:40:571
121520ksoftirqd/13129750irq/30-eth0_g0_21:40:571
3129650510irq/29-eth0_g0_2446199cyclictest22:44:331
2446199511cyclictest17311-21unixbench_multi20:49:401
121510ksoftirqd/13129750irq/30-eth0_g0_21:18:580
3129650500irq/29-eth0_g0_2446199cyclictest23:24:371
2446199501cyclictest7758-21unixbench_singl00:34:421
2446199501cyclictest6926-21df_abs20:09:331
2446199501cyclictest31130-21proc_pri19:34:401
2446199501cyclictest22262-21cat23:24:211
123482500sleep13129650irq/29-eth0_g0_22:43:531
121500ksoftirqd/13129650irq/29-eth0_g0_00:15:171
121500ksoftirqd/13129650irq/29-eth0_g0_00:07:400
3129750490irq/30-eth0_g0_121ksoftirqd/121:34:341
3129650490irq/29-eth0_g0_2446199cyclictest22:59:331
24461994927cyclictest4931-21/usr/sbin/munin19:59:401
2446199491cyclictest323-21head00:04:441
2446199491cyclictest30779-21cat21:44:421
3129750480irq/30-eth0_g0_2446199cyclictest23:17:091
3129650480irq/29-eth0_g0_2446199cyclictest22:33:491
24461994817cyclictest31989-21cat21:49:421
121480ksoftirqd/13129750irq/30-eth0_g0_23:38:500
3129650470irq/29-eth0_g0_14471-21latency20:39:350
2446199472cyclictest6969-21latency_hist00:34:211
2446199472cyclictest6770-21/usr/sbin/munin20:09:221
2446199472cyclictest6770-21/usr/sbin/munin20:09:221
2446199471cyclictest255502sleep123:35:251
3129650460irq/29-eth0_g0_2446199cyclictest23:50:201
2446199461cyclictest10456-21grep20:24:211
121460ksoftirqd/13129750irq/30-eth0_g0_23:59:171
121460ksoftirqd/13129750irq/30-eth0_g0_23:59:171
3129750450irq/30-eth0_g0_31295-21kworker/1:122:13:451
3129750450irq/30-eth0_g0_2446199cyclictest00:11:401
3129750450irq/30-eth0_g0_21092-21vmstat21:04:431
3129750450irq/30-eth0_g0_121ksoftirqd/121:27:091
3129750450irq/30-eth0_g0_121ksoftirqd/121:17:571
3129650450irq/29-eth0_g0_2446199cyclictest22:56:151
3129650450irq/29-eth0_g0_121ksoftirqd/122:59:410
2446199451cyclictest6290-21latency_hist22:19:221
2446199451cyclictest4057-21unixbench_singl00:19:411
2446199451cyclictest0-21swapper/119:54:411
121450ksoftirqd/13129650irq/29-eth0_g0_23:12:471
3129750440irq/30-eth0_g0_2446199cyclictest21:55:031
3129750440irq/30-eth0_g0_121ksoftirqd/122:34:391
3129750440irq/30-eth0_g0_121ksoftirqd/121:12:351
2446199442cyclictest1489-21df21:59:331
24461994415cyclictest11674-21chrt20:29:201
2446199441cyclictest26785-21runrttasks21:29:381
2446199441cyclictest21497-21diskmemload00:26:111
2446199441cyclictest0-21swapper/122:51:141
2446199441cyclictest0-21swapper/120:39:331
2446199441cyclictest0-21swapper/119:26:211
121440ksoftirqd/13129750irq/30-eth0_g0_23:11:090
121440ksoftirqd/13129650irq/29-eth0_g0_00:21:420
3129750430irq/30-eth0_g0_0-21swapper/100:01:531
3129650430irq/29-eth0_g0_13-21kworker/0:121:34:420
24461994323cyclictest19670-21sendmail_mailqu20:59:401
24461994320cyclictest0-21swapper/119:39:341
3129750420irq/30-eth0_g0_0-21swapper/120:44:401
2446199421cyclictest2584-21unixbench_multi19:49:421
2446199421cyclictest0-21swapper/119:21:081
3129750410irq/30-eth0_g0_30149-21unixbench_singl19:29:410
3129750410irq/30-eth0_g0_121ksoftirqd/123:04:411
3129650410irq/29-eth0_g0_3733-21runrttasks22:08:310
3129650410irq/29-eth0_g0_2446099cyclictest23:21:480
3129650410irq/29-eth0_g0_13-21kworker/0:122:18:520
3129650410irq/29-eth0_g0_13-21kworker/0:121:13:420
2446199411cyclictest26079-21cat19:14:371
121410ksoftirqd/13129750irq/30-eth0_g0_21:21:420
3129650400irq/29-eth0_g0_1875-21runrttasks20:52:220
3129650400irq/29-eth0_g0_13-21kworker/0:123:57:080
3129650400irq/29-eth0_g0_13-21kworker/0:123:57:080
3129650400irq/29-eth0_g0_13-21kworker/0:123:51:190
3129650400irq/29-eth0_g0_13-21kworker/0:123:46:250
3129650400irq/29-eth0_g0_13-21kworker/0:123:39:300
3129650400irq/29-eth0_g0_13-21kworker/0:122:31:080
3129650400irq/29-eth0_g0_13-21kworker/0:121:59:310
3129650400irq/29-eth0_g0_13-21kworker/0:121:42:060
3129650400irq/29-eth0_g0_13-21kworker/0:121:42:060
3129650400irq/29-eth0_g0_13-21kworker/0:100:15:570
121400ksoftirqd/13129750irq/30-eth0_g0_23:06:400
54432390sleep03129750irq/30-eth0_g0_00:25:570
3129750390irq/30-eth0_g0_13155-21unixbench_singl22:44:430
3129750390irq/30-eth0_g0_121ksoftirqd/120:38:021
3129650390irq/29-eth0_g0_23972-21unixbench_multi19:04:420
3129650390irq/29-eth0_g0_1851-21munin-run19:49:210
3129650390irq/29-eth0_g0_17905-21/usr/sbin/munin20:54:310
3129650390irq/29-eth0_g0_13-21kworker/0:122:25:570
3129650390irq/29-eth0_g0_13-21kworker/0:122:13:150
3129650390irq/29-eth0_g0_13-21kworker/0:121:31:290
2446199391cyclictest12138-21netstat20:29:371
121390ksoftirqd/13129650irq/29-eth0_g0_23:30:130
70602380sleep03129750irq/30-eth0_g0_22:19:430
70602380sleep03129750irq/30-eth0_g0_22:19:430
3129750380irq/30-eth0_g0_22423-21df_abs23:24:320
3129650380irq/29-eth0_g0_1875-21runrttasks21:44:450
3129650380irq/29-eth0_g0_15916-21runrttasks22:57:340
3129650380irq/29-eth0_g0_13-21kworker/0:121:50:360
3129650380irq/29-eth0_g0_13-21kworker/0:121:25:000
3129650380irq/29-eth0_g0_13-21kworker/0:100:31:110
24461993813cyclictest0-21swapper/119:44:421
2446199381cyclictest8547-21ps20:14:391
2446199381cyclictest184242sleep120:54:391
3129750370irq/30-eth0_g0_1875-21runrttasks20:45:310
3129650370irq/29-eth0_g0_31089-21taskset19:34:390
3129650370irq/29-eth0_g0_23838-21zcat19:04:401
3129650370irq/29-eth0_g0_19381-21latency20:59:350
3129650370irq/29-eth0_g0_1589-21unixbench_singl00:09:430
3129650370irq/29-eth0_g0_14812-21taskset22:54:010
3129650370irq/29-eth0_g0_13-21kworker/0:122:34:360
3129650370irq/29-eth0_g0_12348-21timerandwakeup20:29:410
2446199371cyclictest0-21swapper/119:29:361
3129750360irq/30-eth0_g0_20974-21taskset23:19:200
3129750350irq/30-eth0_g0_7230-21chrt20:09:370
3129750350irq/30-eth0_g0_0-21swapper/020:24:510
3129650350irq/29-eth0_g0_0-21swapper/020:19:330
3129750340irq/30-eth0_g0_2446099cyclictest20:39:210
3129650340irq/29-eth0_g0_27780-21runrttasks19:20:110
3129650340irq/29-eth0_g0_2583-21unixbench_multi19:49:420
3129650340irq/29-eth0_g0_20994-21unixbench_multi21:04:420
2446199341cyclictest24556-21egrep19:09:311
3129650330irq/29-eth0_g0_32456-21sendmail_mailqu19:39:410
3129650330irq/29-eth0_g0_1875-21runrttasks20:04:360
3129650330irq/29-eth0_g0_1875-21runrttasks20:04:360
3129650330irq/29-eth0_g0_0-21swapper/019:54:400
3129650330irq/29-eth0_g0_0-21swapper/019:14:440
3129650320irq/29-eth0_g0_9287-21latency_hist20:19:210
3129650320irq/29-eth0_g0_0-21swapper/019:24:330
3129650310irq/29-eth0_g0_4950-21sendmail_mailst19:59:410
3129750300irq/30-eth0_g0_24549-21/usr/sbin/munin19:09:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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