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2026-08-21 - 05:33

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 21, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
319352790sleep1121750irq/30-eth0_g0_21:18:281
121710ksoftirqd/1121650irq/29-eth0_g0_20:50:131
289202680sleep0121750irq/30-eth0_g0_23:18:470
308452620sleep1121750irq/30-eth0_g0_23:26:411
121540ksoftirqd/1121750irq/30-eth0_g0_21:55:190
121490ksoftirqd/1121750irq/30-eth0_g0_22:58:041
245582480sleep1121750irq/30-eth0_g0_23:01:381
121650480irq/29-eth0_g0_31ksoftirqd/023:36:450
121480ksoftirqd/1121750irq/30-eth0_g0_22:36:181
121470ksoftirqd/1121750irq/30-eth0_g0_21:28:151
121470ksoftirqd/1121750irq/30-eth0_g0_19:06:410
121650450irq/29-eth0_g0_30446-21/usr/sbin/munin19:01:450
121450ksoftirqd/1121750irq/30-eth0_g0_22:38:561
121450ksoftirqd/1121750irq/30-eth0_g0_19:06:361
55122440chrt121650irq/29-eth0_g0_21:42:000
31588994430cyclictest1964-21runrttasks21:50:011
31588994430cyclictest1964-21runrttasks21:50:011
121750440irq/30-eth0_g0_1219-21kworker/1:222:44:091
121750440irq/30-eth0_g0_1219-21kworker/1:200:25:001
121750440irq/30-eth0_g0_121ksoftirqd/122:06:381
121750440irq/30-eth0_g0_121ksoftirqd/122:06:381
121650440irq/29-eth0_g0_31ksoftirqd/021:51:250
121650440irq/29-eth0_g0_31ksoftirqd/021:51:250
121650440irq/29-eth0_g0_26098-21wc23:06:440
121650440irq/29-eth0_g0_13-21kworker/0:100:16:390
121650440irq/29-eth0_g0_13-21kworker/0:100:12:470
121440ksoftirqd/1121750irq/30-eth0_g0_22:16:470
121440ksoftirqd/1121750irq/30-eth0_g0_00:31:100
121440ksoftirqd/1121650irq/29-eth0_g0_23:23:491
121440ksoftirqd/1121650irq/29-eth0_g0_00:26:451
121750430irq/30-eth0_g0_1219-21kworker/1:223:33:481
121750430irq/30-eth0_g0_1219-21kworker/1:200:34:401
121430ksoftirqd/1121650irq/29-eth0_g0_19:39:221
121750420irq/30-eth0_g0_1219-21kworker/1:221:52:341
121650420irq/29-eth0_g0_31ksoftirqd/022:51:380
121650420irq/29-eth0_g0_31ksoftirqd/021:31:450
121650420irq/29-eth0_g0_31ksoftirqd/000:35:030
121650420irq/29-eth0_g0_13-21kworker/0:123:12:160
121650420irq/29-eth0_g0_13-21kworker/0:121:08:120
121420ksoftirqd/1121750irq/30-eth0_g0_19:16:451
3158899411cyclictest3596-21grep23:46:481
121750410irq/30-eth0_g0_1219-21kworker/1:223:39:461
121750410irq/30-eth0_g0_121ksoftirqd/123:12:481
121650410irq/29-eth0_g0_31ksoftirqd/023:47:100
121650410irq/29-eth0_g0_31ksoftirqd/021:11:370
121650410irq/29-eth0_g0_13-21kworker/0:121:24:460
121410ksoftirqd/1121750irq/30-eth0_g0_22:11:360
121410ksoftirqd/1121650irq/29-eth0_g0_22:19:111
121410ksoftirqd/1121650irq/29-eth0_g0_19:32:231
3158899401cyclictest28510-21diskmemload21:06:391
3158899401cyclictest109392sleep100:16:461
121750400irq/30-eth0_g0_1219-21kworker/1:200:01:441
121750400irq/30-eth0_g0_121ksoftirqd/122:45:460
121750400irq/30-eth0_g0_121ksoftirqd/122:13:041
121750400irq/30-eth0_g0_121ksoftirqd/122:01:341
121650400irq/29-eth0_g0_31ksoftirqd/023:53:030
121650400irq/29-eth0_g0_31ksoftirqd/023:34:370
121650400irq/29-eth0_g0_1964-21runrttasks20:02:390
121650400irq/29-eth0_g0_13-21kworker/0:123:41:250
121650400irq/29-eth0_g0_13-21kworker/0:123:03:470
121650400irq/29-eth0_g0_13-21kworker/0:122:57:440
121650400irq/29-eth0_g0_13-21kworker/0:122:27:260
121650400irq/29-eth0_g0_13-21kworker/0:100:09:320
121650400irq/29-eth0_g0_13-21kworker/0:100:04:130
121650400irq/29-eth0_g0_0-21swapper/022:06:460
121650400irq/29-eth0_g0_0-21swapper/022:06:460
121400ksoftirqd/1121650irq/29-eth0_g0_20:52:351
121400ksoftirqd/1121650irq/29-eth0_g0_19:42:241
3158899391cyclictest5086-21sort21:41:401
121750390irq/30-eth0_g0_121ksoftirqd/122:30:081
121750390irq/30-eth0_g0_121ksoftirqd/122:22:161
121750390irq/30-eth0_g0_121ksoftirqd/121:36:271
121750390irq/30-eth0_g0_121ksoftirqd/121:36:271
121750390irq/30-eth0_g0_121ksoftirqd/100:12:441
121750390irq/30-eth0_g0_0-21swapper/122:54:141
121650390irq/29-eth0_g0_31166-21unixbench_singl23:26:460
121650390irq/29-eth0_g0_19280-21chrt22:40:370
121650390irq/29-eth0_g0_13-21kworker/0:122:49:390
121650390irq/29-eth0_g0_13-21kworker/0:122:00:430
121650390irq/29-eth0_g0_13-21kworker/0:121:40:050
121650390irq/29-eth0_g0_13-21kworker/0:121:40:050
121650390irq/29-eth0_g0_13-21kworker/0:121:29:350
121650390irq/29-eth0_g0_13-21kworker/0:100:23:490
121650390irq/29-eth0_g0_13-21kworker/0:100:01:090
121650390irq/29-eth0_g0_121ksoftirqd/123:41:401
121650390irq/29-eth0_g0_0-21swapper/022:31:380
121390ksoftirqd/1121750irq/30-eth0_g0_21:00:060
121390ksoftirqd/1121750irq/30-eth0_g0_20:31:300
121390ksoftirqd/1121750irq/30-eth0_g0_20:31:300
121390ksoftirqd/1121750irq/30-eth0_g0_19:27:220
121390ksoftirqd/1121650irq/29-eth0_g0_23:56:521
121390ksoftirqd/1121650irq/29-eth0_g0_21:13:201
121390ksoftirqd/1121650irq/29-eth0_g0_20:31:321
121390ksoftirqd/1121650irq/29-eth0_g0_20:31:321
3158899381cyclictest210862sleep122:46:421
121750380irq/30-eth0_g0_1219-21kworker/1:221:57:371
121750380irq/30-eth0_g0_1219-21kworker/1:221:32:521
121650380irq/29-eth0_g0_1964-21runrttasks20:26:240
121650380irq/29-eth0_g0_13-21kworker/0:121:17:510
121380ksoftirqd/1121650irq/29-eth0_g0_23:19:351
121380ksoftirqd/1121650irq/29-eth0_g0_20:37:241
121380ksoftirqd/1121650irq/29-eth0_g0_20:37:241
121380ksoftirqd/1121650irq/29-eth0_g0_20:30:521
121380ksoftirqd/1121650irq/29-eth0_g0_20:24:481
121380ksoftirqd/1121650irq/29-eth0_g0_20:09:371
121380ksoftirqd/1121650irq/29-eth0_g0_19:57:221
121380ksoftirqd/1121650irq/29-eth0_g0_00:07:151
3158899371cyclictest15511-21/usr/sbin/munin20:11:391
121750370irq/30-eth0_g0_30674-21iostat19:01:381
121650370irq/29-eth0_g0_3327-21ntp_states19:21:430
121650370irq/29-eth0_g0_24372-21tail20:46:460
121650370irq/29-eth0_g0_21721-21ps20:36:430
121650370irq/29-eth0_g0_21721-21ps20:36:430
121650370irq/29-eth0_g0_1964-21runrttasks20:14:160
121650370irq/29-eth0_g0_13-21kworker/0:123:23:370
121650370irq/29-eth0_g0_0-21swapper/020:26:420
3158899361cyclictest3549-21grep19:21:461
3158899361cyclictest25871-21missed_timers23:06:391
3158899361cyclictest22708-21interrupts20:41:381
3158899361cyclictest22708-21interrupts20:41:381
3158899361cyclictest10566-21cat19:51:401
121750360irq/30-eth0_g0_1219-21kworker/1:221:23:121
121750360irq/30-eth0_g0_121ksoftirqd/123:52:231
121650360irq/29-eth0_g0_7226-21unixbench_multi19:36:450
121650360irq/29-eth0_g0_2249-21mailstats19:16:450
121650360irq/29-eth0_g0_1964-21runrttasks20:55:430
121650360irq/29-eth0_g0_1964-21runrttasks20:42:430
121650360irq/29-eth0_g0_1964-21runrttasks20:42:430
121650360irq/29-eth0_g0_1964-21runrttasks20:08:150
121650360irq/29-eth0_g0_1964-21runrttasks19:54:580
121650360irq/29-eth0_g0_10552-21seq22:03:430
3158899352cyclictest45412sleep119:26:411
3158899351cyclictest28000-21grep21:01:461
3158899351cyclictest16693-21ls20:16:391
121650350irq/29-eth0_g0_8133-21cat19:41:390
121650350irq/29-eth0_g0_5830-21proc_pri19:31:410
121650350irq/29-eth0_g0_1964-21runrttasks19:48:470
121650350irq/29-eth0_g0_16914-21sendmail_mailst20:16:440
121650350irq/29-eth0_g0_13-21kworker/0:122:22:070
31588993418cyclictest13361-21sed20:01:481
3158899340cyclictest0-21swapper/120:56:361
121750340irq/30-eth0_g0_0-21swapper/119:46:431
121650340irq/29-eth0_g0_449-21/usr/sbin/munin19:11:430
121650330irq/29-eth0_g0_0-21swapper/019:56:370
3158899321cyclictest0-21swapper/119:14:261
121650310irq/29-eth0_g0_0-21swapper/021:01:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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