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2026-08-20 - 01:50

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Thu Aug 20, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121810ksoftirqd/1121750irq/30-eth0_g0_23:33:300
121710ksoftirqd/1121750irq/30-eth0_g0_00:05:201
6742660chrt121750irq/30-eth0_g0_22:22:261
121640ksoftirqd/1121750irq/30-eth0_g0_23:49:310
121620ksoftirqd/1259962sleep019:41:440
121620ksoftirqd/1259962sleep019:41:440
128272610sleep1121750irq/30-eth0_g0_23:11:491
121590ksoftirqd/1121750irq/30-eth0_g0_19:11:461
238182580sleep1121750irq/30-eth0_g0_19:31:481
121550ksoftirqd/1121750irq/30-eth0_g0_23:10:431
218062520chrt121750irq/30-eth0_g0_23:50:531
121510ksoftirqd/1121750irq/30-eth0_g0_22:09:211
156292500sleep0121650irq/29-eth0_g0_23:25:110
133332490sleep1121750irq/30-eth0_g0_21:01:471
121490ksoftirqd/1121650irq/29-eth0_g0_20:06:391
289112480sleep0121650irq/29-eth0_g0_00:18:080
289112480sleep0121650irq/29-eth0_g0_00:18:080
121650480irq/29-eth0_g0_16978-21taskset19:06:270
121470ksoftirqd/1121750irq/30-eth0_g0_21:33:381
121750460irq/30-eth0_g0_1219-21kworker/1:222:48:111
121460ksoftirqd/1121750irq/30-eth0_g0_22:11:321
121750450irq/30-eth0_g0_1219-21kworker/1:221:57:181
121650450irq/29-eth0_g0_121ksoftirqd/123:29:110
121450ksoftirqd/1121750irq/30-eth0_g0_00:08:561
121750440irq/30-eth0_g0_1219-21kworker/1:221:22:091
121750430irq/30-eth0_g0_0-21swapper/100:26:491
121650430irq/29-eth0_g0_121ksoftirqd/121:25:470
121650430irq/29-eth0_g0_121ksoftirqd/121:10:470
121430ksoftirqd/1121750irq/30-eth0_g0_23:58:061
121430ksoftirqd/1121750irq/30-eth0_g0_22:44:030
121430ksoftirqd/1121750irq/30-eth0_g0_21:13:321
121430ksoftirqd/1121750irq/30-eth0_g0_21:13:321
121430ksoftirqd/1121650irq/29-eth0_g0_00:19:061
121430ksoftirqd/1121650irq/29-eth0_g0_00:19:061
121430ksoftirqd/1121650irq/29-eth0_g0_00:14:161
121750420irq/30-eth0_g0_1219-21kworker/1:223:41:401
121750420irq/30-eth0_g0_121ksoftirqd/122:05:160
121420ksoftirqd/1121750irq/30-eth0_g0_20:01:471
121420ksoftirqd/1121650irq/29-eth0_g0_22:04:471
223112410sleep0121650irq/29-eth0_g0_19:26:420
121750410irq/30-eth0_g0_13-21kworker/0:122:16:440
121750410irq/30-eth0_g0_1219-21kworker/1:223:38:581
121750410irq/30-eth0_g0_121ksoftirqd/122:21:071
121750410irq/30-eth0_g0_121ksoftirqd/121:44:461
121650410irq/29-eth0_g0_13-21kworker/0:121:16:420
121650410irq/29-eth0_g0_121ksoftirqd/122:36:411
121650410irq/29-eth0_g0_0-21swapper/021:56:390
121410ksoftirqd/1121750irq/30-eth0_g0_23:46:020
121410ksoftirqd/1121750irq/30-eth0_g0_20:26:401
258172400sleep0121650irq/29-eth0_g0_21:52:520
121750400irq/30-eth0_g0_1219-21kworker/1:223:21:581
121750400irq/30-eth0_g0_1219-21kworker/1:222:27:321
121750400irq/30-eth0_g0_121ksoftirqd/121:36:361
121750400irq/30-eth0_g0_121ksoftirqd/121:28:561
121650400irq/29-eth0_g0_9384-21taskset20:46:410
121650400irq/29-eth0_g0_6108-21sed22:46:380
121650400irq/29-eth0_g0_31ksoftirqd/000:06:440
121650400irq/29-eth0_g0_21757-21proc_pri21:36:460
121650400irq/29-eth0_g0_13-21kworker/0:123:53:240
121650400irq/29-eth0_g0_13-21kworker/0:123:20:160
121650400irq/29-eth0_g0_13-21kworker/0:122:57:040
121650400irq/29-eth0_g0_13-21kworker/0:122:39:530
121650400irq/29-eth0_g0_13-21kworker/0:122:23:270
121650400irq/29-eth0_g0_13-21kworker/0:122:13:520
121650400irq/29-eth0_g0_13-21kworker/0:122:06:590
121650400irq/29-eth0_g0_13-21kworker/0:121:49:440
121650400irq/29-eth0_g0_13-21kworker/0:100:26:550
121650400irq/29-eth0_g0_0-21swapper/021:44:140
121400ksoftirqd/1121650irq/29-eth0_g0_19:17:141
1694599391cyclictest29739-21proc_pri19:56:501
1694599391cyclictest26766-21taskset19:46:271
1694599391cyclictest26766-21taskset19:46:271
121750390irq/30-eth0_g0_31ksoftirqd/021:29:150
121750390irq/30-eth0_g0_2998-21sed22:31:501
121750390irq/30-eth0_g0_121ksoftirqd/123:34:001
121750390irq/30-eth0_g0_121ksoftirqd/123:21:041
121750390irq/30-eth0_g0_121ksoftirqd/121:52:251
121750390irq/30-eth0_g0_121ksoftirqd/121:18:291
121650390irq/29-eth0_g0_1964-21runrttasks20:08:310
121650390irq/29-eth0_g0_13-21kworker/0:123:12:550
121650390irq/29-eth0_g0_13-21kworker/0:122:53:160
121650390irq/29-eth0_g0_11595-21grep23:06:470
121390ksoftirqd/116442-21grep19:01:521
121390ksoftirqd/1121750irq/30-eth0_g0_22:29:430
121390ksoftirqd/1121750irq/30-eth0_g0_21:11:390
121390ksoftirqd/1121750irq/30-eth0_g0_21:11:390
121390ksoftirqd/1121750irq/30-eth0_g0_20:55:370
121390ksoftirqd/1121750irq/30-eth0_g0_20:33:530
121390ksoftirqd/1121750irq/30-eth0_g0_20:33:530
121390ksoftirqd/1121750irq/30-eth0_g0_20:22:220
121390ksoftirqd/1121750irq/30-eth0_g0_19:54:210
121390ksoftirqd/1121750irq/30-eth0_g0_19:34:240
121390ksoftirqd/1121750irq/30-eth0_g0_19:12:150
121390ksoftirqd/1121750irq/30-eth0_g0_19:10:210
121390ksoftirqd/1121650irq/29-eth0_g0_23:52:341
121390ksoftirqd/1121650irq/29-eth0_g0_00:34:051
1694599382cyclictest3424-21proc_pri20:21:471
1694599382cyclictest10292-21/usr/sbin/munin20:51:481
1694599381cyclictest26893-21df_abs19:46:381
1694599381cyclictest10175-21proc_pri23:01:461
121750380irq/30-eth0_g0_1219-21kworker/1:221:47:421
121750380irq/30-eth0_g0_1219-21kworker/1:200:21:471
121650380irq/29-eth0_g0_30785-21cat20:01:420
121650380irq/29-eth0_g0_13-21kworker/0:123:37:040
121650380irq/29-eth0_g0_13-21kworker/0:100:36:140
121650380irq/29-eth0_g0_13-21kworker/0:100:11:440
121650380irq/29-eth0_g0_13-21kworker/0:100:02:510
121650380irq/29-eth0_g0_0-21swapper/021:01:390
121380ksoftirqd/1121650irq/29-eth0_g0_22:42:311
121380ksoftirqd/1121650irq/29-eth0_g0_21:06:491
121380ksoftirqd/1121650irq/29-eth0_g0_20:40:101
121380ksoftirqd/1121650irq/29-eth0_g0_20:40:101
121380ksoftirqd/1121650irq/29-eth0_g0_20:18:131
121380ksoftirqd/1121650irq/29-eth0_g0_19:28:201
1694599371cyclictest72602sleep122:51:361
1694599371cyclictest28171-21seq19:51:371
121750370irq/30-eth0_g0_1219-21kworker/1:223:27:281
121750370irq/30-eth0_g0_1219-21kworker/1:222:58:571
121650370irq/29-eth0_g0_2109-21lldpd23:56:530
121650370irq/29-eth0_g0_1964-21runrttasks20:43:190
121650370irq/29-eth0_g0_1964-21runrttasks19:40:410
121650370irq/29-eth0_g0_1964-21runrttasks19:21:390
121650370irq/29-eth0_g0_13-21kworker/0:122:33:280
121650370irq/29-eth0_g0_13-21kworker/0:121:35:440
121370ksoftirqd/1121750irq/30-eth0_g0_00:26:060
121370ksoftirqd/1121650irq/29-eth0_g0_19:06:491
1694599361cyclictest8556-21unixbench_singl20:41:471
1694599361cyclictest24546-21/usr/sbin/munin19:36:381
121650360irq/29-eth0_g0_31ksoftirqd/023:03:000
121650360irq/29-eth0_g0_29573-21missed_timers19:56:450
121650360irq/29-eth0_g0_27358-21sendmail_mailqu19:46:460
121650360irq/29-eth0_g0_1964-21runrttasks20:40:350
121650360irq/29-eth0_g0_1964-21runrttasks20:40:350
121750350irq/30-eth0_g0_20767-21df_abs19:21:391
121650350irq/29-eth0_g0_2280-21mailstats20:16:460
121650350irq/29-eth0_g0_1964-21runrttasks20:16:210
121650350irq/29-eth0_g0_0-21swapper/020:56:410
121650350irq/29-eth0_g0_0-21swapper/020:26:360
1694599341cyclictest9126-21chrt20:46:371
121650340irq/29-eth0_g0_13-21kworker/0:119:16:380
1694599331cyclictest7872sleep120:11:431
1694599331cyclictest5592-21if_eth020:31:391
1694599331cyclictest5592-21if_eth020:31:391
121650330irq/29-eth0_g0_11502-21runrttasks20:56:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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