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2026-03-19 - 13:39

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 Thu Mar 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2562821640sleep0121650irq/29-eth0_g0_00:17:230
1211040ksoftirqd/1121750irq/30-eth0_g0_22:25:021
121940ksoftirqd/1121750irq/30-eth0_g0_20:19:491
121780ksoftirqd/1121650irq/29-eth0_g0_19:24:391
183882700sleep1121750irq/30-eth0_g0_23:48:391
121570ksoftirqd/1121750irq/30-eth0_g0_22:20:001
121540ksoftirqd/1121750irq/30-eth0_g0_23:15:011
49402520sleep0121650irq/29-eth0_g0_22:54:000
206572520sleep1121650irq/29-eth0_g0_23:56:331
121500ksoftirqd/1121750irq/30-eth0_g0_23:34:421
121500ksoftirqd/1121650irq/29-eth0_g0_21:41:280
121650490irq/29-eth0_g0_31ksoftirqd/020:39:570
121490ksoftirqd/1121750irq/30-eth0_g0_22:46:311
121480ksoftirqd/1121650irq/29-eth0_g0_20:44:441
121470ksoftirqd/1121650irq/29-eth0_g0_22:39:350
121470ksoftirqd/1121650irq/29-eth0_g0_19:04:581
121460ksoftirqd/1121650irq/29-eth0_g0_21:55:101
8322450sleep1121750irq/30-eth0_g0_20:24:501
230702450sleep0121750irq/30-eth0_g0_00:06:080
121650450irq/29-eth0_g0_13-21kworker/0:121:23:480
121450ksoftirqd/1121650irq/29-eth0_g0_23:26:251
121450ksoftirqd/1121650irq/29-eth0_g0_21:38:301
121450ksoftirqd/1121650irq/29-eth0_g0_00:23:101
121750440irq/30-eth0_g0_470-21kworker/1:121:48:201
121750440irq/30-eth0_g0_470-21kworker/1:121:20:001
121440ksoftirqd/1121750irq/30-eth0_g0_22:20:010
121440ksoftirqd/1121650irq/29-eth0_g0_20:37:031
121650430irq/29-eth0_g0_31319-21grep22:29:400
121650430irq/29-eth0_g0_121ksoftirqd/122:39:581
121750420irq/30-eth0_g0_470-21kworker/1:123:20:581
121750420irq/30-eth0_g0_470-21kworker/1:122:14:581
121750420irq/30-eth0_g0_470-21kworker/1:121:40:081
121650420irq/29-eth0_g0_31ksoftirqd/023:28:120
121650420irq/29-eth0_g0_13601-21df_abs19:04:500
121420ksoftirqd/1121750irq/30-eth0_g0_21:29:550
121750410irq/30-eth0_g0_470-21kworker/1:123:14:141
121750410irq/30-eth0_g0_282432sleep100:29:191
121750410irq/30-eth0_g0_2152-21snmpd21:15:061
121750410irq/30-eth0_g0_121ksoftirqd/123:03:311
121750410irq/30-eth0_g0_121ksoftirqd/122:38:201
121750410irq/30-eth0_g0_0-21swapper/021:24:590
121650410irq/29-eth0_g0_31424-21cpu22:29:490
121650410irq/29-eth0_g0_31ksoftirqd/023:17:140
121650410irq/29-eth0_g0_31ksoftirqd/000:20:000
121650410irq/29-eth0_g0_24432-21ntp_states21:59:560
121650410irq/29-eth0_g0_23712-21latency00:09:510
121650410irq/29-eth0_g0_13-21kworker/0:100:33:330
121410ksoftirqd/1121650irq/29-eth0_g0_23:31:311
121410ksoftirqd/1121650irq/29-eth0_g0_23:07:371
121410ksoftirqd/1121650irq/29-eth0_g0_20:29:531
1467899402cyclictest30054-21proc_pri00:34:581
1467899401cyclictest224762sleep100:04:511
121750400irq/30-eth0_g0_470-21kworker/1:122:52:571
121750400irq/30-eth0_g0_121ksoftirqd/100:29:511
121650400irq/29-eth0_g0_9874-21/usr/sbin/munin20:59:591
121650400irq/29-eth0_g0_2029-21runrttasks19:24:550
121650400irq/29-eth0_g0_13-21kworker/0:123:56:270
121650400irq/29-eth0_g0_13-21kworker/0:123:39:220
121650400irq/29-eth0_g0_13-21kworker/0:123:11:540
121650400irq/29-eth0_g0_13-21kworker/0:122:14:480
121650400irq/29-eth0_g0_13-21kworker/0:122:10:250
121650400irq/29-eth0_g0_13-21kworker/0:100:26:200
121650400irq/29-eth0_g0_121ksoftirqd/121:28:461
121650400irq/29-eth0_g0_11848-21sed21:09:510
121650400irq/29-eth0_g0_11848-21sed21:09:510
121400ksoftirqd/1121650irq/29-eth0_g0_22:45:340
121400ksoftirqd/1121650irq/29-eth0_g0_19:29:061
121400ksoftirqd/1121650irq/29-eth0_g0_19:09:481
1467899391cyclictest5617-21grep22:54:591
1467899391cyclictest5617-21grep22:54:591
1467899391cyclictest26967-21cat19:59:391
1467899391cyclictest26967-21cat19:59:391
121650390irq/29-eth0_g0_86832sleep023:09:390
121650390irq/29-eth0_g0_7340-21proc_pri20:49:580
121650390irq/29-eth0_g0_2029-21runrttasks22:42:140
121650390irq/29-eth0_g0_13-21kworker/0:121:57:220
121650390irq/29-eth0_g0_13-21kworker/0:121:49:120
121650390irq/29-eth0_g0_13-21kworker/0:121:35:210
121650390irq/29-eth0_g0_13-21kworker/0:121:14:470
121650390irq/29-eth0_g0_13-21kworker/0:100:34:590
121650390irq/29-eth0_g0_121ksoftirqd/121:49:541
121650390irq/29-eth0_g0_121ksoftirqd/121:49:541
121650390irq/29-eth0_g0_11839-21grep23:20:010
121390ksoftirqd/1121750irq/30-eth0_g0_23:45:340
121390ksoftirqd/1121750irq/30-eth0_g0_23:03:140
121390ksoftirqd/1121750irq/30-eth0_g0_21:02:380
121390ksoftirqd/1121750irq/30-eth0_g0_20:56:550
121390ksoftirqd/1121750irq/30-eth0_g0_19:19:310
121390ksoftirqd/1121750irq/30-eth0_g0_00:00:430
121390ksoftirqd/1121750irq/30-eth0_g0_00:00:430
121390ksoftirqd/1121650irq/29-eth0_g0_21:07:191
121390ksoftirqd/1121650irq/29-eth0_g0_00:00:441
121390ksoftirqd/1121650irq/29-eth0_g0_00:00:441
1467899381cyclictest11685-21diskmemload23:50:511
121750380irq/30-eth0_g0_470-21kworker/1:100:11:521
121750380irq/30-eth0_g0_0-21swapper/122:32:171
121750380irq/30-eth0_g0_0-21swapper/122:00:501
121750380irq/30-eth0_g0_0-21swapper/100:16:161
121650380irq/29-eth0_g0_31ksoftirqd/022:05:160
121650380irq/29-eth0_g0_21851-21latency21:49:530
121650380irq/29-eth0_g0_21851-21latency21:49:530
121650380irq/29-eth0_g0_2029-21runrttasks20:29:020
121650380irq/29-eth0_g0_19670-21/usr/sbin/munin19:30:000
121650380irq/29-eth0_g0_13-21kworker/0:123:50:340
121380ksoftirqd/15574-21taskset20:44:401
121380ksoftirqd/1121750irq/30-eth0_g0_23:31:250
121380ksoftirqd/1121750irq/30-eth0_g0_20:45:590
1467899372cyclictest2048-21/usr/sbin/munin19:18:381
1467899372cyclictest12486-21head21:10:021
1467899372cyclictest12486-21head21:10:021
1467899371cyclictest31109-21ntp_states20:14:561
1467899371cyclictest29550-21sed20:09:511
121750370irq/30-eth0_g0_121ksoftirqd/122:12:301
121650370irq/29-eth0_g0_31ksoftirqd/019:49:580
121650370irq/29-eth0_g0_31ksoftirqd/019:49:580
121650370irq/29-eth0_g0_23737-21ntpdc19:44:560
121650370irq/29-eth0_g0_13-21kworker/0:123:40:310
121650370irq/29-eth0_g0_13-21kworker/0:122:55:270
121650370irq/29-eth0_g0_13-21kworker/0:122:55:270
121650370irq/29-eth0_g0_121ksoftirqd/121:30:291
121370ksoftirqd/1121750irq/30-eth0_g0_19:36:160
1467899361cyclictest27427-21cat19:59:571
1467899361cyclictest21493-21chrt19:34:591
1467899361cyclictest0-21swapper/119:29:591
121650360irq/29-eth0_g0_30946-21irqstats20:14:530
121650360irq/29-eth0_g0_27557-21rt-features20:00:000
121650360irq/29-eth0_g0_2029-21runrttasks20:06:230
121650360irq/29-eth0_g0_2029-21runrttasks19:39:420
121650360irq/29-eth0_g0_15046-21sed19:09:520
121360ksoftirqd/125882-21unixbench_multi22:05:001
1467899351cyclictest24850-21latency19:49:541
1467899351cyclictest24850-21latency19:49:541
121750350irq/30-eth0_g0_0-21swapper/123:40:451
121650350irq/29-eth0_g0_31932-21/usr/sbin/munin20:19:550
121650350irq/29-eth0_g0_30085-21sort20:10:000
121650350irq/29-eth0_g0_2029-21runrttasks20:32:050
121650350irq/29-eth0_g0_2029-21runrttasks19:56:000
121650350irq/29-eth0_g0_2029-21runrttasks19:56:000
121350ksoftirqd/1121750irq/30-eth0_g0_19:23:060
121350ksoftirqd/1121650irq/29-eth0_g0_19:40:291
121650340irq/29-eth0_g0_10809-21latency21:04:540
1467899331cyclictest7241-21netstat20:49:551
121750330irq/30-eth0_g0_28654-21taskset20:04:561
121650330irq/29-eth0_g0_3195-21/usr/sbin/munin20:34:530
1467899321cyclictest82872sleep120:54:531
1467899321cyclictest238702sleep119:44:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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