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2026-08-07 - 05:20

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 Fri Aug 07, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1306321600sleep0121650irq/29-eth0_g0_23:37:550
2980721530sleep1121650irq/29-eth0_g0_22:35:491
1211270ksoftirqd/1121750irq/30-eth0_g0_00:27:321
273092730sleep1121750irq/30-eth0_g0_20:12:161
228512680sleep0121650irq/29-eth0_g0_00:17:500
121680ksoftirqd/1121750irq/30-eth0_g0_23:17:111
121680ksoftirqd/1121750irq/30-eth0_g0_23:17:111
102332680sleep1121750irq/30-eth0_g0_23:27:161
121610ksoftirqd/1213122sleep000:12:190
254322580sleep1121750irq/30-eth0_g0_22:17:141
121580ksoftirqd/1121750irq/30-eth0_g0_21:14:030
323552550sleep1121750irq/30-eth0_g0_22:46:581
121480ksoftirqd/1121750irq/30-eth0_g0_00:02:501
121470ksoftirqd/1121750irq/30-eth0_g0_22:22:471
121750460irq/30-eth0_g0_29524-21seq20:22:091
121460ksoftirqd/1121750irq/30-eth0_g0_23:06:281
114672450sleep1121650irq/29-eth0_g0_21:21:071
220412440sleep0121650irq/29-eth0_g0_22:02:210
220412440sleep0121650irq/29-eth0_g0_22:02:210
121650440irq/29-eth0_g0_10190-21awk19:02:150
121650430irq/29-eth0_g0_31381-21df_inode22:42:120
121650430irq/29-eth0_g0_31ksoftirqd/023:07:200
121430ksoftirqd/1121650irq/29-eth0_g0_23:37:191
121430ksoftirqd/1121650irq/29-eth0_g0_21:47:141
121430ksoftirqd/1121650irq/29-eth0_g0_20:17:181
121430ksoftirqd/1121650irq/29-eth0_g0_19:21:531
121430ksoftirqd/1121650irq/29-eth0_g0_00:34:591
121430ksoftirqd/1121650irq/29-eth0_g0_00:09:411
200272420sleep0121650irq/29-eth0_g0_21:56:070
121750420irq/30-eth0_g0_1219-21kworker/1:221:42:401
121750420irq/30-eth0_g0_1219-21kworker/1:221:39:021
121750420irq/30-eth0_g0_121ksoftirqd/121:33:140
121420ksoftirqd/1121750irq/30-eth0_g0_22:19:590
298062410sleep0121650irq/29-eth0_g0_22:35:480
121750410irq/30-eth0_g0_1219-21kworker/1:221:55:281
121750410irq/30-eth0_g0_1219-21kworker/1:221:28:241
121750410irq/30-eth0_g0_121ksoftirqd/121:23:031
121650410irq/29-eth0_g0_31ksoftirqd/021:42:110
121650410irq/29-eth0_g0_13-21kworker/0:122:30:470
121650410irq/29-eth0_g0_13-21kworker/0:121:25:570
121650410irq/29-eth0_g0_13-21kworker/0:100:02:150
121650410irq/29-eth0_g0_13-21kworker/0:100:00:270
121650410irq/29-eth0_g0_13-21kworker/0:100:00:270
121650410irq/29-eth0_g0_121ksoftirqd/123:48:391
121410ksoftirqd/1121650irq/29-eth0_g0_20:48:241
1095399411cyclictest5610-21df_abs20:57:111
121750400irq/30-eth0_g0_1219-21kworker/1:222:51:441
121750400irq/30-eth0_g0_1219-21kworker/1:222:51:441
121750400irq/30-eth0_g0_1219-21kworker/1:200:20:051
121750400irq/30-eth0_g0_121ksoftirqd/122:41:181
121650400irq/29-eth0_g0_31ksoftirqd/021:37:110
121650400irq/29-eth0_g0_31ksoftirqd/000:26:010
121650400irq/29-eth0_g0_13-21kworker/0:123:44:200
121650400irq/29-eth0_g0_13-21kworker/0:122:24:040
121650400irq/29-eth0_g0_13-21kworker/0:121:48:010
121650400irq/29-eth0_g0_1219-21kworker/1:222:52:141
121650400irq/29-eth0_g0_121ksoftirqd/121:30:280
121650400irq/29-eth0_g0_10949-21rt-features21:17:230
121400ksoftirqd/1121750irq/30-eth0_g0_23:30:440
121400ksoftirqd/1121750irq/30-eth0_g0_23:20:470
121400ksoftirqd/1121750irq/30-eth0_g0_23:20:470
121400ksoftirqd/1121650irq/29-eth0_g0_20:34:071
1095399401cyclictest8546-21timerandwakeup21:07:191
1095399401cyclictest14385-21wc21:32:141
121750390irq/30-eth0_g0_31ksoftirqd/000:28:260
121750390irq/30-eth0_g0_121ksoftirqd/122:30:021
121650390irq/29-eth0_g0_30147-21df_abs22:37:120
121650390irq/29-eth0_g0_1964-21runrttasks23:52:220
121650390irq/29-eth0_g0_1964-21runrttasks20:17:320
121650390irq/29-eth0_g0_15384-21seq23:47:210
121650390irq/29-eth0_g0_13-21kworker/0:123:16:370
121650390irq/29-eth0_g0_13-21kworker/0:121:59:060
121650390irq/29-eth0_g0_121ksoftirqd/123:53:491
121650390irq/29-eth0_g0_0-21swapper/023:22:220
121390ksoftirqd/1121750irq/30-eth0_g0_23:03:110
121390ksoftirqd/1121750irq/30-eth0_g0_23:00:500
121390ksoftirqd/1121750irq/30-eth0_g0_22:47:400
121390ksoftirqd/1121750irq/30-eth0_g0_22:47:400
121390ksoftirqd/1121750irq/30-eth0_g0_22:13:120
121390ksoftirqd/1121750irq/30-eth0_g0_21:09:110
121390ksoftirqd/1121750irq/30-eth0_g0_21:04:070
121390ksoftirqd/1121750irq/30-eth0_g0_21:01:270
121390ksoftirqd/1121750irq/30-eth0_g0_20:51:100
121390ksoftirqd/1121750irq/30-eth0_g0_20:37:090
121390ksoftirqd/1121750irq/30-eth0_g0_20:26:540
121390ksoftirqd/1121750irq/30-eth0_g0_20:02:310
121390ksoftirqd/1121750irq/30-eth0_g0_19:57:100
121390ksoftirqd/1121750irq/30-eth0_g0_19:42:510
121390ksoftirqd/1121750irq/30-eth0_g0_19:40:540
121390ksoftirqd/1121750irq/30-eth0_g0_19:32:500
121390ksoftirqd/1121750irq/30-eth0_g0_19:18:520
121390ksoftirqd/1121750irq/30-eth0_g0_19:10:010
121390ksoftirqd/1121750irq/30-eth0_g0_00:35:550
121390ksoftirqd/1121750irq/30-eth0_g0_00:08:570
121390ksoftirqd/1121650irq/29-eth0_g0_23:34:410
121390ksoftirqd/1121650irq/29-eth0_g0_23:13:291
1095399391cyclictest9139-21fgrep23:22:181
1095399391cyclictest5165-21taskset23:07:121
1095399391cyclictest23766-21ps00:22:191
121650380irq/29-eth0_g0_31279-21grep20:27:220
121650380irq/29-eth0_g0_31ksoftirqd/022:10:580
121650380irq/29-eth0_g0_15083-21netstat19:22:140
121380ksoftirqd/1121650irq/29-eth0_g0_22:09:441
121380ksoftirqd/1121650irq/29-eth0_g0_22:01:421
121380ksoftirqd/1121650irq/29-eth0_g0_19:50:111
121380ksoftirqd/1121650irq/29-eth0_g0_19:50:111
1095399382cyclictest2878-21ntpq22:57:161
121750370irq/30-eth0_g0_2413-21timerandwakeup20:42:210
121750370irq/30-eth0_g0_2413-21timerandwakeup20:42:210
121750370irq/30-eth0_g0_1219-21kworker/1:223:46:351
121750370irq/30-eth0_g0_121ksoftirqd/100:12:511
121750370irq/30-eth0_g0_11507-21grep19:07:161
121750370irq/30-eth0_g0_0-21swapper/121:13:131
121650370irq/29-eth0_g0_7872-21diskmemload22:52:300
121650370irq/29-eth0_g0_31049-21proc_pri20:27:191
121370ksoftirqd/1121650irq/29-eth0_g0_22:12:211
121370ksoftirqd/1121650irq/29-eth0_g0_22:02:321
121370ksoftirqd/1121650irq/29-eth0_g0_22:02:321
121370ksoftirqd/1121650irq/29-eth0_g0_19:25:201
1095399372cyclictest4967-21grep20:52:191
1095399372cyclictest17446-21cat23:57:131
1095399372cyclictest17446-21cat23:57:131
1095399371cyclictest0-21swapper/120:02:111
18862360sleep11887-21df20:42:101
18862360sleep11887-21df20:42:101
121750360irq/30-eth0_g0_7867-21crond21:06:581
121750360irq/30-eth0_g0_649-21df_abs20:37:081
121650360irq/29-eth0_g0_2126-21lldpd19:27:160
121650360irq/29-eth0_g0_1928-21sshd19:49:070
121650360irq/29-eth0_g0_1928-21sshd19:49:070
121360ksoftirqd/1121750irq/30-eth0_g0_20:34:440
1095399362cyclictest23382-21df_abs19:57:111
1095399361cyclictest0-21swapper/123:36:581
121750350irq/30-eth0_g0_10521-21uptime19:02:201
121650350irq/29-eth0_g0_26292-21sort20:07:180
121650350irq/29-eth0_g0_22188-21df_inode19:52:110
121650350irq/29-eth0_g0_1964-21runrttasks20:53:280
121650350irq/29-eth0_g0_12590-21cat19:12:150
1095399352cyclictest18371-21/usr/sbin/munin19:37:151
1095399352cyclictest17605-21proc_pri19:32:171
1095399351cyclictest20234-21tail19:42:191
121750340irq/30-eth0_g0_16145-21cat19:27:121
121650340irq/29-eth0_g0_27311-21ntpq20:12:160
1095399341cyclictest26108-21/usr/sbin/munin20:07:151
1095399341cyclictest22703-21grep19:52:211
1095399341cyclictest0-21swapper/119:12:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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