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2026-07-30 - 12:43

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 all highest latencies:
System rack3slot5s.osadl.org (updated Thu Jul 30, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121990ksoftirqd/1121750irq/30-eth0_g0_21:50:481
121910ksoftirqd/1121750irq/30-eth0_g0_19:02:351
121910ksoftirqd/1121750irq/30-eth0_g0_19:02:351
205032790sleep1121750irq/30-eth0_g0_20:37:371
121680ksoftirqd/1121750irq/30-eth0_g0_23:03:470
121680ksoftirqd/1121750irq/30-eth0_g0_23:03:470
121680ksoftirqd/1121750irq/30-eth0_g0_21:57:281
204652630sleep0121650irq/29-eth0_g0_22:50:070
251312580sleep1121750irq/30-eth0_g0_20:57:291
107412550sleep1121750irq/30-eth0_g0_19:57:351
252142540sleep0121750irq/30-eth0_g0_23:08:250
252142540sleep0121750irq/30-eth0_g0_23:08:250
121520ksoftirqd/1121750irq/30-eth0_g0_23:50:531
121520ksoftirqd/1121750irq/30-eth0_g0_23:50:531
316562510sleep0121750irq/30-eth0_g0_21:22:360
316562510sleep0121750irq/30-eth0_g0_21:22:360
121650500irq/29-eth0_g0_31ksoftirqd/000:27:420
121500ksoftirqd/1121750irq/30-eth0_g0_19:52:401
121490ksoftirqd/1121750irq/30-eth0_g0_23:46:221
121490ksoftirqd/1121750irq/30-eth0_g0_19:47:350
121470ksoftirqd/1121750irq/30-eth0_g0_21:19:551
121460ksoftirqd/1121750irq/30-eth0_g0_23:25:381
121460ksoftirqd/1121750irq/30-eth0_g0_22:57:191
121460ksoftirqd/1121750irq/30-eth0_g0_22:30:541
121460ksoftirqd/1121650irq/29-eth0_g0_22:25:040
240232450sleep1121750irq/30-eth0_g0_23:03:471
240232450sleep1121750irq/30-eth0_g0_23:03:471
121650450irq/29-eth0_g0_13-21kworker/0:123:14:050
121750440irq/30-eth0_g0_121ksoftirqd/122:22:291
121750440irq/30-eth0_g0_121ksoftirqd/121:52:341
121750440irq/30-eth0_g0_10529-21seq00:22:281
121650430irq/29-eth0_g0_13-21kworker/0:123:00:480
121650430irq/29-eth0_g0_13-21kworker/0:122:12:040
121430ksoftirqd/1121750irq/30-eth0_g0_00:28:391
121430ksoftirqd/1121650irq/29-eth0_g0_00:06:391
121750420irq/30-eth0_g0_1219-21kworker/1:222:35:341
121750420irq/30-eth0_g0_121ksoftirqd/120:32:311
121650420irq/29-eth0_g0_3853-21irqstats21:42:330
121650420irq/29-eth0_g0_2200-21ntp_offset23:47:350
121650420irq/29-eth0_g0_2200-21ntp_offset23:47:350
121650420irq/29-eth0_g0_121ksoftirqd/123:31:120
121650420irq/29-eth0_g0_121ksoftirqd/122:42:311
121650420irq/29-eth0_g0_121ksoftirqd/100:16:530
121420ksoftirqd/1121750irq/30-eth0_g0_23:32:131
121420ksoftirqd/1121650irq/29-eth0_g0_21:07:361
121420ksoftirqd/1121650irq/29-eth0_g0_19:52:400
3042599411cyclictest10960-21/usr/sbin/munin22:12:311
121750410irq/30-eth0_g0_1219-21kworker/1:223:37:271
121750410irq/30-eth0_g0_1219-21kworker/1:222:51:311
121750410irq/30-eth0_g0_1219-21kworker/1:200:33:191
121750410irq/30-eth0_g0_121ksoftirqd/121:45:041
121650410irq/29-eth0_g0_31ksoftirqd/022:02:510
121650410irq/29-eth0_g0_24986-21sed20:57:180
121650410irq/29-eth0_g0_13-21kworker/0:123:21:550
121650410irq/29-eth0_g0_13-21kworker/0:122:28:200
121650410irq/29-eth0_g0_13-21kworker/0:122:17:350
121650410irq/29-eth0_g0_13-21kworker/0:100:32:310
121650410irq/29-eth0_g0_121ksoftirqd/100:06:550
121650410irq/29-eth0_g0_0-21swapper/019:06:360
121650410irq/29-eth0_g0_0-21swapper/019:06:360
3042599402cyclictest4528-21latency23:57:341
121750400irq/30-eth0_g0_31ksoftirqd/021:11:520
121750400irq/30-eth0_g0_121ksoftirqd/123:35:421
121650400irq/29-eth0_g0_31ksoftirqd/000:23:290
121650400irq/29-eth0_g0_13-21kworker/0:123:45:370
121650400irq/29-eth0_g0_13-21kworker/0:122:52:480
121650400irq/29-eth0_g0_13-21kworker/0:122:00:110
121650400irq/29-eth0_g0_13-21kworker/0:121:37:110
121400ksoftirqd/1121750irq/30-eth0_g0_00:07:340
3042599391cyclictest3678-21chrt19:27:391
3042599391cyclictest10113-21awk22:07:341
121750390irq/30-eth0_g0_1219-21kworker/1:223:19:001
121750390irq/30-eth0_g0_1219-21kworker/1:221:26:361
121750390irq/30-eth0_g0_1219-21kworker/1:221:26:361
121750390irq/30-eth0_g0_121ksoftirqd/122:40:341
121650390irq/29-eth0_g0_30552-21/usr/sbin/munin23:32:290
121650390irq/29-eth0_g0_31ksoftirqd/022:38:220
121650390irq/29-eth0_g0_13-21kworker/0:123:39:070
121650390irq/29-eth0_g0_13-21kworker/0:123:23:270
121650390irq/29-eth0_g0_13-21kworker/0:122:33:390
121650390irq/29-eth0_g0_13-21kworker/0:121:21:280
121650390irq/29-eth0_g0_12226-21unixbench_multi20:02:390
121390ksoftirqd/1121650irq/29-eth0_g0_23:57:430
121390ksoftirqd/1121650irq/29-eth0_g0_22:17:471
121390ksoftirqd/1121650irq/29-eth0_g0_20:51:001
121390ksoftirqd/1121650irq/29-eth0_g0_20:51:001
121390ksoftirqd/1121650irq/29-eth0_g0_20:31:031
121390ksoftirqd/1121650irq/29-eth0_g0_20:04:431
121390ksoftirqd/1121650irq/29-eth0_g0_19:25:511
121390ksoftirqd/1121650irq/29-eth0_g0_00:10:131
3042599382cyclictest3743-21unixbench_singl23:52:431
3042599381cyclictest0-21swapper/119:17:321
121750380irq/30-eth0_g0_0-21swapper/120:07:341
121650380irq/29-eth0_g0_13-21kworker/0:122:47:060
121650380irq/29-eth0_g0_13-21kworker/0:121:41:330
121650380irq/29-eth0_g0_121ksoftirqd/121:37:191
121380ksoftirqd/1121750irq/30-eth0_g0_21:51:320
121380ksoftirqd/1121750irq/30-eth0_g0_21:12:580
121380ksoftirqd/1121650irq/29-eth0_g0_23:08:131
121380ksoftirqd/1121650irq/29-eth0_g0_23:08:131
121380ksoftirqd/1121650irq/29-eth0_g0_21:34:061
121380ksoftirqd/1121650irq/29-eth0_g0_20:23:181
121380ksoftirqd/1121650irq/29-eth0_g0_19:49:001
3042599372cyclictest26376-21taskset23:12:391
3042599371cyclictest28740-21/usr/sbin/munin21:12:281
121750370irq/30-eth0_g0_4666-21pluginstate19:32:371
121750370irq/30-eth0_g0_30423-21cyclictest00:15:401
121750370irq/30-eth0_g0_121ksoftirqd/122:57:041
121750370irq/30-eth0_g0_121ksoftirqd/122:03:041
121650370irq/29-eth0_g0_31ksoftirqd/019:57:380
121650370irq/29-eth0_g0_1964-21runrttasks21:52:190
121650370irq/29-eth0_g0_1964-21runrttasks21:31:360
121650370irq/29-eth0_g0_13-21kworker/0:122:14:590
121370ksoftirqd/1121650irq/29-eth0_g0_00:20:431
3042599361cyclictest5908-21ps19:37:361
3042599361cyclictest16391-21taskset20:22:181
121750360irq/30-eth0_g0_1219-21kworker/1:221:28:191
121650360irq/29-eth0_g0_3564-21zcat23:52:400
121650360irq/29-eth0_g0_1964-21runrttasks20:30:010
121650360irq/29-eth0_g0_1964-21runrttasks19:17:140
121650360irq/29-eth0_g0_1964-21runrttasks00:17:580
121650360irq/29-eth0_g0_1928-21sshd20:45:290
121650360irq/29-eth0_g0_12947-21/usr/sbin/munin20:07:300
3042599351cyclictest421-21latency_hist19:17:181
3042599351cyclictest21894-21sendmail_mailtr20:42:391
3042599351cyclictest0-21swapper/121:03:191
3042599350cyclictest0-21swapper/120:57:181
121650350irq/29-eth0_g0_6847-21/usr/sbin/munin19:42:300
121650350irq/29-eth0_g0_4756-21grep19:32:380
121650350irq/29-eth0_g0_30518-21cpu19:07:280
121650350irq/29-eth0_g0_25741-21vmstat20:57:400
121650350irq/29-eth0_g0_1964-21runrttasks20:16:070
121650350irq/29-eth0_g0_1964-21runrttasks20:16:070
121650350irq/29-eth0_g0_1964-21runrttasks19:41:380
121650350irq/29-eth0_g0_1964-21runrttasks19:23:220
121650350irq/29-eth0_g0_1964-21runrttasks19:20:410
3042599341cyclictest7091-21open_inodes19:42:351
166112340sleep0121650irq/29-eth0_g0_20:22:300
121650340irq/29-eth0_g0_27364-21sh21:07:170
121650340irq/29-eth0_g0_22565-21cpu20:47:280
121650340irq/29-eth0_g0_22565-21cpu20:47:280
121650340irq/29-eth0_g0_15407-21/usr/sbin/munin20:17:300
121650340irq/29-eth0_g0_0-21swapper/020:37:420
3042599331cyclictest0-21swapper/119:07:341
121650330irq/29-eth0_g0_3532-21gzip19:27:370
121650330irq/29-eth0_g0_19051-21df_inode20:32:320
121650300irq/29-eth0_g0_14751-21runrttasks20:12:401
121650300irq/29-eth0_g0_14751-21runrttasks20:12:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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