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2026-07-04 - 07:18

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 Sat Jul 04, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258912950sleep1121750irq/30-eth0_g0_21:08:431
5312940sleep0121650irq/29-eth0_g0_23:51:120
121860ksoftirqd/1121750irq/30-eth0_g0_00:08:360
121860ksoftirqd/1121750irq/30-eth0_g0_00:08:360
121850ksoftirqd/1121750irq/30-eth0_g0_22:13:371
17812770sleep0121750irq/30-eth0_g0_19:32:390
306842700sleep1121750irq/30-eth0_g0_21:28:391
78572680sleep1121750irq/30-eth0_g0_00:20:301
121620ksoftirqd/1121750irq/30-eth0_g0_00:03:291
68292600sleep1121750irq/30-eth0_g0_22:03:381
68292600sleep1121750irq/30-eth0_g0_22:03:381
43062590sleep0121650irq/29-eth0_g0_00:06:540
115412540sleep1121750irq/30-eth0_g0_00:35:351
121750510irq/30-eth0_g0_121ksoftirqd/122:48:371
121510ksoftirqd/1121750irq/30-eth0_g0_21:33:321
297132500sleep0121650irq/29-eth0_g0_21:24:170
121470ksoftirqd/1121650irq/29-eth0_g0_21:17:531
121470ksoftirqd/1121650irq/29-eth0_g0_21:17:050
121470ksoftirqd/1121650irq/29-eth0_g0_20:36:581
121470ksoftirqd/1121650irq/29-eth0_g0_20:36:581
321182450sleep0121650irq/29-eth0_g0_21:33:440
121450ksoftirqd/1121750irq/30-eth0_g0_21:53:201
121450ksoftirqd/1121750irq/30-eth0_g0_00:23:411
121450ksoftirqd/1121650irq/29-eth0_g0_19:27:061
2814499441cyclictest0-21swapper/119:53:391
121750440irq/30-eth0_g0_121ksoftirqd/123:29:221
121750440irq/30-eth0_g0_121ksoftirqd/122:58:301
121750440irq/30-eth0_g0_0-21swapper/123:08:311
121440ksoftirqd/1121650irq/29-eth0_g0_21:43:331
121750420irq/30-eth0_g0_1219-21kworker/1:222:24:171
121750420irq/30-eth0_g0_121ksoftirqd/122:19:571
121420ksoftirqd/1121750irq/30-eth0_g0_21:59:241
2814499411cyclictest30143-21sed19:13:421
121750410irq/30-eth0_g0_121ksoftirqd/123:39:141
121750410irq/30-eth0_g0_121ksoftirqd/123:26:191
121650410irq/29-eth0_g0_31ksoftirqd/022:06:020
121650410irq/29-eth0_g0_31ksoftirqd/022:06:020
121650410irq/29-eth0_g0_1964-21runrttasks21:18:590
121650410irq/29-eth0_g0_13-21kworker/0:122:29:130
121650410irq/29-eth0_g0_13-21kworker/0:121:55:000
121650410irq/29-eth0_g0_13-21kworker/0:121:31:070
121650410irq/29-eth0_g0_13-21kworker/0:119:08:400
121650410irq/29-eth0_g0_0-21swapper/021:43:200
121650410irq/29-eth0_g0_0-21swapper/019:03:320
121650410irq/29-eth0_g0_0-21swapper/019:03:320
121410ksoftirqd/1121750irq/30-eth0_g0_00:32:340
34432400sleep0121650irq/29-eth0_g0_21:49:310
2814499401cyclictest19111-21awk22:53:381
121750400irq/30-eth0_g0_1219-21kworker/1:222:30:321
121650400irq/29-eth0_g0_31ksoftirqd/023:11:180
121650400irq/29-eth0_g0_31ksoftirqd/020:18:350
121650400irq/29-eth0_g0_31ksoftirqd/000:33:340
121650400irq/29-eth0_g0_254902sleep123:19:311
121650400irq/29-eth0_g0_13-21kworker/0:122:33:420
121650400irq/29-eth0_g0_13-21kworker/0:122:26:360
121650400irq/29-eth0_g0_13-21kworker/0:122:22:090
121650400irq/29-eth0_g0_13-21kworker/0:100:25:460
121650400irq/29-eth0_g0_13-21kworker/0:100:02:470
121400ksoftirqd/1121750irq/30-eth0_g0_23:02:050
121400ksoftirqd/1121650irq/29-eth0_g0_21:38:341
28144993934cyclictest11888-21df_abs20:13:311
2814499391cyclictest7853-21cat22:08:351
121750390irq/30-eth0_g0_31ksoftirqd/022:17:240
121750390irq/30-eth0_g0_1219-21kworker/1:223:06:111
121750390irq/30-eth0_g0_1219-21kworker/1:222:40:531
121750390irq/30-eth0_g0_1219-21kworker/1:200:31:401
121750390irq/30-eth0_g0_121ksoftirqd/121:25:091
121750390irq/30-eth0_g0_121ksoftirqd/121:22:131
121750390irq/30-eth0_g0_0-21swapper/100:15:101
121650390irq/29-eth0_g0_7823-21memory22:08:350
121650390irq/29-eth0_g0_25975-21/usr/sbin/munin23:23:290
121650390irq/29-eth0_g0_1964-21runrttasks23:17:500
121650390irq/29-eth0_g0_1964-21runrttasks00:16:100
121650390irq/29-eth0_g0_15177-21memory22:38:360
121650390irq/29-eth0_g0_13-21kworker/0:123:55:100
121650390irq/29-eth0_g0_13-21kworker/0:123:43:350
121650390irq/29-eth0_g0_13-21kworker/0:123:40:420
121650390irq/29-eth0_g0_13-21kworker/0:123:06:370
121650390irq/29-eth0_g0_13-21kworker/0:121:46:460
121650390irq/29-eth0_g0_13-21kworker/0:121:10:060
121390ksoftirqd/18459-21ntpdc19:58:361
121390ksoftirqd/1121650irq/29-eth0_g0_22:34:441
121390ksoftirqd/1121650irq/29-eth0_g0_20:39:001
121390ksoftirqd/1121650irq/29-eth0_g0_19:50:181
121390ksoftirqd/1121650irq/29-eth0_g0_19:12:441
121390ksoftirqd/1121650irq/29-eth0_g0_00:08:501
121390ksoftirqd/1121650irq/29-eth0_g0_00:08:501
2814499381cyclictest32667-21unixbench_multi23:48:411
2814499381cyclictest29049-21grep23:33:411
121750380irq/30-eth0_g0_1219-21kworker/1:223:43:241
121750380irq/30-eth0_g0_1219-21kworker/1:200:01:271
121750380irq/30-eth0_g0_121ksoftirqd/120:58:201
121650380irq/29-eth0_g0_7289-21proc_pri19:53:370
121650380irq/29-eth0_g0_4788-21ntpdc19:43:380
121650380irq/29-eth0_g0_4788-21ntpdc19:43:380
121650380irq/29-eth0_g0_19373-21runrttasks22:54:390
121650380irq/29-eth0_g0_13-21kworker/0:123:32:530
121650380irq/29-eth0_g0_13-21kworker/0:123:19:210
121650380irq/29-eth0_g0_13-21kworker/0:122:02:230
121650380irq/29-eth0_g0_13-21kworker/0:100:19:130
121650380irq/29-eth0_g0_121ksoftirqd/123:58:091
121380ksoftirqd/1121650irq/29-eth0_g0_21:06:111
121380ksoftirqd/1121650irq/29-eth0_g0_20:46:271
121380ksoftirqd/1121650irq/29-eth0_g0_20:25:351
121380ksoftirqd/1121650irq/29-eth0_g0_20:12:511
121380ksoftirqd/1121650irq/29-eth0_g0_20:07:281
121380ksoftirqd/1121650irq/29-eth0_g0_19:34:121
121380ksoftirqd/1121650irq/29-eth0_g0_19:30:441
121380ksoftirqd/1121650irq/29-eth0_g0_19:22:021
2814499371cyclictest23498-21head20:58:411
121750370irq/30-eth0_g0_1219-21kworker/1:222:46:141
121750370irq/30-eth0_g0_1219-21kworker/1:221:53:231
121750370irq/30-eth0_g0_0-21swapper/020:48:370
121650370irq/29-eth0_g0_2814399cyclictest22:49:170
121650370irq/29-eth0_g0_1964-21runrttasks20:35:370
121650370irq/29-eth0_g0_1964-21runrttasks20:35:370
121650370irq/29-eth0_g0_1964-21runrttasks19:24:200
121650370irq/29-eth0_g0_13-21kworker/0:123:35:590
121650370irq/29-eth0_g0_13-21kworker/0:122:43:390
121370ksoftirqd/1121650irq/29-eth0_g0_23:17:301
121370ksoftirqd/1121650irq/29-eth0_g0_20:23:021
121650360irq/29-eth0_g0_3781-21sort19:38:410
121650360irq/29-eth0_g0_3781-21sort19:38:410
121650360irq/29-eth0_g0_24551-21zcat21:03:430
121650360irq/29-eth0_g0_1964-21runrttasks20:11:000
121650360irq/29-eth0_g0_1964-21runrttasks19:36:460
121650360irq/29-eth0_g0_1964-21runrttasks19:16:340
121650360irq/29-eth0_g0_14870-21unixbench_multi20:23:410
121360ksoftirqd/127321-21ls19:03:351
121360ksoftirqd/127321-21ls19:03:351
121360ksoftirqd/121503-21taskset20:53:201
121750350irq/30-eth0_g0_1964-21runrttasks19:49:570
121650350irq/29-eth0_g0_31ksoftirqd/020:58:330
121650350irq/29-eth0_g0_1964-21runrttasks19:19:500
121650350irq/29-eth0_g0_13-21kworker/0:120:03:300
121350ksoftirqd/1121750irq/30-eth0_g0_20:55:370
121650340irq/29-eth0_g0_1964-21runrttasks20:28:220
121650340irq/29-eth0_g0_1964-21runrttasks20:28:220
121650340irq/29-eth0_g0_1964-21runrttasks19:58:300
121650340irq/29-eth0_g0_12311-21sendmail_mailtr20:13:400
121340ksoftirqd/1121750irq/30-eth0_g0_20:43:350
2814499331cyclictest0-21swapper/119:38:421
2814499331cyclictest0-21swapper/119:38:421
121650330irq/29-eth0_g0_0-21swapper/120:33:191
121650330irq/29-eth0_g0_0-21swapper/120:33:191
121650320irq/29-eth0_g0_4956-21/usr/sbin/munin19:43:411
121650320irq/29-eth0_g0_4956-21/usr/sbin/munin19:43:411
121650320irq/29-eth0_g0_0-21swapper/020:38:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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