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2026-03-20 - 19:41

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 Fri Mar 20, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2122521620sleep1121650irq/29-eth0_g0_11:45:241
2122521620sleep1121650irq/29-eth0_g0_11:45:241
3175521610sleep1121750irq/30-eth0_g0_10:17:421
1022321270sleep0121650irq/29-eth0_g0_11:00:530
121840ksoftirqd/1121650irq/29-eth0_g0_08:09:360
293642780sleep0121650irq/29-eth0_g0_10:08:240
293642780sleep0121650irq/29-eth0_g0_10:08:240
121720ksoftirqd/1121750irq/30-eth0_g0_08:04:491
281872630sleep0121750irq/30-eth0_g0_12:14:500
237252580sleep1121750irq/30-eth0_g0_11:55:581
121570ksoftirqd/1121750irq/30-eth0_g0_10:46:111
288192530sleep1121750irq/30-eth0_g0_12:18:101
121510ksoftirqd/1121650irq/29-eth0_g0_09:39:501
121490ksoftirqd/1121750irq/30-eth0_g0_11:16:101
121480ksoftirqd/1121650irq/29-eth0_g0_10:22:260
141232470sleep0121650irq/29-eth0_g0_11:18:280
238692460sleep1121750irq/30-eth0_g0_07:34:361
121460ksoftirqd/1121650irq/29-eth0_g0_12:05:380
121750450irq/30-eth0_g0_470-21kworker/1:112:09:141
184052440sleep0121650irq/29-eth0_g0_09:24:170
121440ksoftirqd/1121650irq/29-eth0_g0_12:13:331
127042430sleep0121750irq/30-eth0_g0_11:11:120
121750430irq/30-eth0_g0_470-21kworker/1:110:52:011
121750430irq/30-eth0_g0_470-21kworker/1:110:52:011
121750430irq/30-eth0_g0_15076-21irqstats09:09:501
121650430irq/29-eth0_g0_24135-21/usr/sbin/munin11:59:570
121650430irq/29-eth0_g0_121ksoftirqd/109:27:500
121430ksoftirqd/1121650irq/29-eth0_g0_10:21:261
121430ksoftirqd/1121650irq/29-eth0_g0_07:59:291
121750420irq/30-eth0_g0_470-21kworker/1:109:22:491
121750420irq/30-eth0_g0_121ksoftirqd/110:05:131
121750420irq/30-eth0_g0_121ksoftirqd/110:05:131
121650420irq/29-eth0_g0_0-21swapper/007:08:430
121420ksoftirqd/1121650irq/29-eth0_g0_11:34:511
1772499412cyclictest715-21grep08:09:561
1772499411cyclictest21793-21cat07:24:511
121750410irq/30-eth0_g0_470-21kworker/1:110:56:321
121650410irq/29-eth0_g0_202332sleep011:43:100
121410ksoftirqd/1121650irq/29-eth0_g0_09:45:001
211412400sleep0121750irq/30-eth0_g0_07:21:350
1772499401cyclictest29742-21unixbench_singl12:19:571
1772499401cyclictest29742-21unixbench_singl12:19:571
1772499401cyclictest248682sleep109:49:481
1772499401cyclictest16197-21df_abs09:14:461
121750400irq/30-eth0_g0_470-21kworker/1:110:32:051
121750400irq/30-eth0_g0_4151-21taskset10:36:361
121650400irq/29-eth0_g0_3104-21taskset10:33:420
121650400irq/29-eth0_g0_13-21kworker/0:112:37:460
121650400irq/29-eth0_g0_13-21kworker/0:112:22:000
121650400irq/29-eth0_g0_13-21kworker/0:112:22:000
121650400irq/29-eth0_g0_13-21kworker/0:111:48:420
121650400irq/29-eth0_g0_13-21kworker/0:111:48:420
121650400irq/29-eth0_g0_13-21kworker/0:110:38:350
121650400irq/29-eth0_g0_13-21kworker/0:109:42:420
121650400irq/29-eth0_g0_13-21kworker/0:109:32:200
121400ksoftirqd/1121750irq/30-eth0_g0_08:14:551
121400ksoftirqd/1121750irq/30-eth0_g0_07:20:101
121400ksoftirqd/1121650irq/29-eth0_g0_10:41:241
121400ksoftirqd/1121650irq/29-eth0_g0_09:59:541
121400ksoftirqd/1121650irq/29-eth0_g0_09:56:051
1772499391cyclictest14748-21diskmemload10:14:361
121750390irq/30-eth0_g0_2029-21runrttasks07:09:251
121650390irq/29-eth0_g0_14748-21diskmemload09:34:500
121650390irq/29-eth0_g0_13-21kworker/0:111:34:550
121650390irq/29-eth0_g0_13-21kworker/0:109:17:060
121650390irq/29-eth0_g0_1267-21proc_pri10:24:530
121390ksoftirqd/1121750irq/30-eth0_g0_11:53:310
121390ksoftirqd/1121750irq/30-eth0_g0_11:29:481
121390ksoftirqd/1121650irq/29-eth0_g0_11:04:461
121390ksoftirqd/1121650irq/29-eth0_g0_09:27:501
121390ksoftirqd/1121650irq/29-eth0_g0_09:07:561
121390ksoftirqd/1121650irq/29-eth0_g0_07:44:581
121390ksoftirqd/1121650irq/29-eth0_g0_07:44:581
1772499382cyclictest19662-21proc_pri11:39:521
1772499382cyclictest14998-21unixbench_singl11:19:581
1772499382cyclictest13010-21grep08:59:581
1772499381cyclictest160632sleep111:24:551
121750380irq/30-eth0_g0_470-21kworker/1:112:35:191
121750380irq/30-eth0_g0_470-21kworker/1:111:11:331
121750380irq/30-eth0_g0_470-21kworker/1:111:00:421
121750380irq/30-eth0_g0_470-21kworker/1:109:36:261
121750380irq/30-eth0_g0_0-21swapper/110:28:431
121750380irq/30-eth0_g0_0-21swapper/109:34:111
121650380irq/29-eth0_g0_8656-21sort08:44:360
121650380irq/29-eth0_g0_31ksoftirqd/012:33:110
121650380irq/29-eth0_g0_31ksoftirqd/012:09:570
121650380irq/29-eth0_g0_27753-21df_abs07:49:450
121650380irq/29-eth0_g0_13-21kworker/0:111:54:470
121650380irq/29-eth0_g0_13-21kworker/0:110:57:530
121650380irq/29-eth0_g0_13-21kworker/0:110:54:370
121650380irq/29-eth0_g0_13-21kworker/0:110:54:370
121650380irq/29-eth0_g0_13-21kworker/0:110:46:380
121650380irq/29-eth0_g0_13-21kworker/0:110:41:530
121650380irq/29-eth0_g0_13-21kworker/0:109:48:010
121650380irq/29-eth0_g0_12686-21cat08:59:510
121650380irq/29-eth0_g0_121ksoftirqd/110:13:140
121650380irq/29-eth0_g0_121ksoftirqd/109:49:370
121380ksoftirqd/1121750irq/30-eth0_g0_09:57:320
121380ksoftirqd/1121650irq/29-eth0_g0_11:49:591
1772499371cyclictest31252-21grep08:04:361
121650370irq/29-eth0_g0_31ksoftirqd/011:21:450
121650370irq/29-eth0_g0_1719-21ntp_offset08:14:530
121650370irq/29-eth0_g0_15932-21/usr/sbin/munin11:24:530
121650370irq/29-eth0_g0_13-21kworker/0:112:26:500
121650370irq/29-eth0_g0_13-21kworker/0:110:01:490
121650370irq/29-eth0_g0_13-21kworker/0:109:11:040
121650370irq/29-eth0_g0_0-21swapper/011:33:460
121370ksoftirqd/1121650irq/29-eth0_g0_12:04:011
1772499361cyclictest28085-21seq07:49:521
1772499361cyclictest14748-21diskmemload12:30:071
1772499361cyclictest10154-21/usr/sbin/munin08:49:501
1772499361cyclictest0-21swapper/107:34:461
121750360irq/30-eth0_g0_470-21kworker/1:112:26:181
121650360irq/29-eth0_g0_5566-21sendmail_mailqu08:29:550
121650360irq/29-eth0_g0_31ksoftirqd/007:59:520
121650360irq/29-eth0_g0_23041-21cat07:29:520
121650360irq/29-eth0_g0_2029-21runrttasks08:51:020
121650360irq/29-eth0_g0_2029-21runrttasks08:46:220
121650360irq/29-eth0_g0_2029-21runrttasks07:55:080
121650360irq/29-eth0_g0_13-21kworker/0:110:16:470
121750350irq/30-eth0_g0_19497-21proc_pri07:14:531
121750350irq/30-eth0_g0_0-21swapper/108:29:411
121650350irq/29-eth0_g0_2974-21ntp_states08:19:520
121650350irq/29-eth0_g0_26871-21proc_pri07:44:550
121650350irq/29-eth0_g0_26871-21proc_pri07:44:550
121650350irq/29-eth0_g0_25747-21timerandwakeup07:39:560
121650350irq/29-eth0_g0_2029-21runrttasks07:18:220
121650350irq/29-eth0_g0_14069-21proc_pri09:04:550
121650350irq/29-eth0_g0_0-21swapper/011:06:370
1772499341cyclictest3934-21sed08:24:471
1772499341cyclictest18183-21netstat07:09:511
121750340irq/30-eth0_g0_11697-21sendmail_mailqu08:54:561
121650340irq/29-eth0_g0_732-21grep08:09:560
121650340irq/29-eth0_g0_25140-21latency_hist07:39:370
121650340irq/29-eth0_g0_2029-21runrttasks08:38:090
121650340irq/29-eth0_g0_2029-21runrttasks07:28:100
121650340irq/29-eth0_g0_18486-21sed07:09:570
121650340irq/29-eth0_g0_11414-21ls08:54:500
121340ksoftirqd/1121750irq/30-eth0_g0_07:39:541
121650330irq/29-eth0_g0_4437-21unixbench_multi08:24:560
1772499321cyclictest0-21swapper/108:19:511
121750310irq/30-eth0_g0_1772499cyclictest08:39:561
1772499301cyclictest9310-21wc08:44:551
66302290sleep16631-21awk08:34:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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