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2026-04-13 - 04:41

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 Mon Apr 13, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1194221380sleep03129650irq/29-eth0_g0_22:57:580
697221370sleep03129650irq/29-eth0_g0_22:37:020
407121190sleep13129650irq/29-eth0_g0_00:38:551
1211100ksoftirqd/13129750irq/30-eth0_g0_22:21:561
121960ksoftirqd/13129650irq/29-eth0_g0_19:19:330
121950ksoftirqd/13129750irq/30-eth0_g0_19:29:311
121870ksoftirqd/13129750irq/30-eth0_g0_23:52:080
121860ksoftirqd/13129650irq/29-eth0_g0_23:34:270
180942750sleep03129750irq/30-eth0_g0_23:23:220
121540ksoftirqd/13129750irq/30-eth0_g0_23:29:161
121510ksoftirqd/13129750irq/30-eth0_g0_23:38:341
121510ksoftirqd/13129750irq/30-eth0_g0_00:04:451
121500ksoftirqd/13129750irq/30-eth0_g0_23:15:051
121500ksoftirqd/13129750irq/30-eth0_g0_23:09:381
15222480sleep13129650irq/29-eth0_g0_00:27:551
3129650470irq/29-eth0_g0_31ksoftirqd/021:29:370
247622470sleep13129650irq/29-eth0_g0_23:49:341
185562470sleep13129750irq/30-eth0_g0_21:11:431
121450ksoftirqd/13129750irq/30-eth0_g0_22:59:291
121450ksoftirqd/13129750irq/30-eth0_g0_22:58:001
121450ksoftirqd/13129650irq/29-eth0_g0_20:25:411
3129750440irq/30-eth0_g0_31295-21kworker/1:100:01:551
3129750440irq/30-eth0_g0_31295-21kworker/1:100:01:551
3129650440irq/29-eth0_g0_31ksoftirqd/021:37:470
3129650440irq/29-eth0_g0_20150-21sed19:04:380
3129650440irq/29-eth0_g0_1875-21runrttasks21:52:590
121440ksoftirqd/13129650irq/29-eth0_g0_21:24:201
38342430sleep03129650irq/29-eth0_g0_00:36:070
3129750430irq/30-eth0_g0_31295-21kworker/1:123:39:481
3129750430irq/30-eth0_g0_31ksoftirqd/000:09:330
3129750430irq/30-eth0_g0_121ksoftirqd/123:04:581
3129750430irq/30-eth0_g0_105792sleep122:51:221
3129750420irq/30-eth0_g0_10035-21taskset20:37:171
3129650420irq/29-eth0_g0_31ksoftirqd/023:44:360
3129650420irq/29-eth0_g0_31ksoftirqd/000:24:350
121420ksoftirqd/13129650irq/29-eth0_g0_21:17:170
121420ksoftirqd/13129650irq/29-eth0_g0_21:17:170
3129750410irq/30-eth0_g0_31295-21kworker/1:123:32:101
3129750410irq/30-eth0_g0_31295-21kworker/1:100:15:471
3129750410irq/30-eth0_g0_121ksoftirqd/121:49:331
3129650410irq/29-eth0_g0_13-21kworker/0:123:32:560
3129650410irq/29-eth0_g0_121ksoftirqd/121:55:520
26082410sleep03129750irq/30-eth0_g0_00:31:060
3129750400irq/30-eth0_g0_31295-21kworker/1:121:57:061
3129750400irq/30-eth0_g0_121ksoftirqd/121:17:181
3129750400irq/30-eth0_g0_121ksoftirqd/121:17:181
3129650400irq/29-eth0_g0_31ksoftirqd/021:39:310
3129650400irq/29-eth0_g0_13-21kworker/0:123:10:280
3129650400irq/29-eth0_g0_13-21kworker/0:122:44:170
121400ksoftirqd/13129650irq/29-eth0_g0_21:11:300
3129750390irq/30-eth0_g0_31295-21kworker/1:123:48:241
3129750390irq/30-eth0_g0_31295-21kworker/1:121:38:271
3129750390irq/30-eth0_g0_31ksoftirqd/023:05:080
3129750390irq/30-eth0_g0_121ksoftirqd/122:05:131
3129750390irq/30-eth0_g0_121ksoftirqd/122:05:131
3129750390irq/30-eth0_g0_121ksoftirqd/121:21:371
3129650390irq/29-eth0_g0_31ksoftirqd/022:05:020
3129650390irq/29-eth0_g0_31ksoftirqd/022:05:020
3129650390irq/29-eth0_g0_28103-21taskset00:04:270
3129650390irq/29-eth0_g0_13-21kworker/0:123:55:560
3129650390irq/29-eth0_g0_13-21kworker/0:123:03:410
3129650390irq/29-eth0_g0_121ksoftirqd/100:09:211
3129650390irq/29-eth0_g0_10337-21unixbench_multi22:49:400
121390ksoftirqd/13129750irq/30-eth0_g0_22:42:580
121390ksoftirqd/13129750irq/30-eth0_g0_21:45:540
121390ksoftirqd/13129750irq/30-eth0_g0_19:56:290
121390ksoftirqd/13129650irq/29-eth0_g0_21:00:071
121390ksoftirqd/13129650irq/29-eth0_g0_21:00:071
3129750380irq/30-eth0_g0_31295-21kworker/1:122:18:531
3129750380irq/30-eth0_g0_31295-21kworker/1:121:33:371
3129650380irq/29-eth0_g0_9482-21sshd20:34:350
3129650380irq/29-eth0_g0_1875-21runrttasks22:35:571
3129650380irq/29-eth0_g0_13-21kworker/0:123:42:100
3129650380irq/29-eth0_g0_13-21kworker/0:122:20:560
3129650380irq/29-eth0_g0_13-21kworker/0:121:23:040
2061199381cyclictest8115-21sed20:29:331
2061199381cyclictest17549-21diskmemload23:59:171
2061199381cyclictest174472sleep123:19:351
121380ksoftirqd/13129750irq/30-eth0_g0_20:04:040
3129750370irq/30-eth0_g0_31295-21kworker/1:121:48:391
3129750370irq/30-eth0_g0_19931-21proc_pri19:04:361
3129750370irq/30-eth0_g0_1795-21df00:29:291
3129750370irq/30-eth0_g0_1211-21/usr/sbin/munin19:59:381
3129750370irq/30-eth0_g0_121ksoftirqd/121:43:321
3129650370irq/29-eth0_g0_4571-21chrt20:14:330
3129650370irq/29-eth0_g0_30881-21ntp_offset00:14:330
3129650370irq/29-eth0_g0_29524-21/usr/sbin/munin19:44:330
3129650370irq/29-eth0_g0_22398-21proc_pri19:14:350
3129650370irq/29-eth0_g0_1875-21runrttasks20:29:350
3129650370irq/29-eth0_g0_13-21kworker/0:123:18:200
3129650370irq/29-eth0_g0_13-21kworker/0:122:29:230
3129650370irq/29-eth0_g0_13-21kworker/0:122:26:570
3129650370irq/29-eth0_g0_13-21kworker/0:122:14:550
3129650370irq/29-eth0_g0_13-21kworker/0:122:10:510
3129650370irq/29-eth0_g0_13-21kworker/0:121:59:570
2061199372cyclictest1875-21runrttasks22:39:591
2061199371cyclictest85392sleep122:44:271
2061199371cyclictest5531-21/usr/sbin/munin22:29:391
2061199371cyclictest32184-21proc_pri00:19:371
2061199371cyclictest27409-21wc19:34:371
2061199371cyclictest17080-21sed21:04:381
2061199371cyclictest14678-21grep20:54:381
2061199371cyclictest131282sleep120:49:351
2061199371cyclictest11844-21wc20:44:321
121370ksoftirqd/13129650irq/29-eth0_g0_19:51:411
3129750360irq/30-eth0_g0_326002sleep000:21:220
3129750360irq/30-eth0_g0_31295-21kworker/1:122:10:471
3129650360irq/29-eth0_g0_31ksoftirqd/020:09:330
3129650360irq/29-eth0_g0_26159-21mailstats19:29:360
3129650360irq/29-eth0_g0_2189-21lldpd20:45:410
3129650360irq/29-eth0_g0_1875-21runrttasks21:28:350
3129650360irq/29-eth0_g0_13-21kworker/0:123:28:430
2061199361cyclictest4428-21grep20:14:311
2061199361cyclictest3600-21unixbench_multi20:09:381
2061199361cyclictest30420-21cat19:49:171
2061199361cyclictest10299-21taskset20:39:261
2061199361cyclictest0-21swapper/120:04:361
121360ksoftirqd/13129650irq/29-eth0_g0_19:21:471
3129750350irq/30-eth0_g0_31295-21kworker/1:122:26:331
3129750350irq/30-eth0_g0_0-21swapper/122:01:551
3129650350irq/29-eth0_g0_5796-21ntp_offset20:19:340
3129650350irq/29-eth0_g0_31ksoftirqd/000:02:250
3129650350irq/29-eth0_g0_31ksoftirqd/000:02:250
3129650350irq/29-eth0_g0_1875-21runrttasks20:26:590
3129650350irq/29-eth0_g0_1875-21runrttasks19:13:290
2061199351cyclictest6039-21grep20:19:381
2061199351cyclictest32355-21unixbench_multi19:54:371
2061199351cyclictest28560-21processes19:39:341
2061199351cyclictest22488-21sendmail_mailtr19:14:361
3129650340irq/29-eth0_g0_27194-21netstat19:34:310
3129650340irq/29-eth0_g0_2373-21unixbench_multi20:04:370
3129650340irq/29-eth0_g0_1875-21runrttasks19:49:550
3129650340irq/29-eth0_g0_10946-21sed20:39:380
2061199341cyclictest25030-21unixbench_multi19:24:371
2061199341cyclictest20904-21if_eth019:09:301
3129650330irq/29-eth0_g0_31ksoftirqd/019:24:280
3129650330irq/29-eth0_g0_1875-21runrttasks20:54:290
3129650330irq/29-eth0_g0_15371-21if_err_eth020:59:290
3129650330irq/29-eth0_g0_15371-21if_err_eth020:59:290
3129650320irq/29-eth0_g0_13949-21seq20:54:170
3129650320irq/29-eth0_g0_0-21swapper/021:04:310
3129650320irq/29-eth0_g0_0-21swapper/019:39:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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