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2026-03-18 - 14:23

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Wed Mar 18, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
458821300sleep0121650irq/29-eth0_g0_09:58:270
3149321030sleep1121650irq/29-eth0_g0_11:48:261
81382980sleep1121750irq/30-eth0_g0_10:12:051
121790ksoftirqd/1121750irq/30-eth0_g0_08:30:231
121790ksoftirqd/1121750irq/30-eth0_g0_08:30:231
151932780sleep0121750irq/30-eth0_g0_10:40:010
121760ksoftirqd/1121750irq/30-eth0_g0_11:15:021
121710ksoftirqd/1121650irq/29-eth0_g0_07:50:011
53782700sleep1121750irq/30-eth0_g0_10:00:011
239482680sleep0121750irq/30-eth0_g0_11:16:030
203622660sleep1121750irq/30-eth0_g0_08:49:551
121640ksoftirqd/168212sleep012:19:530
23322580sleep1121750irq/30-eth0_g0_09:49:461
121570ksoftirqd/131192sleep012:04:520
121570ksoftirqd/1121750irq/30-eth0_g0_11:13:080
121530ksoftirqd/1121750irq/30-eth0_g0_11:13:421
121530ksoftirqd/1121750irq/30-eth0_g0_09:33:241
121520ksoftirqd/1121750irq/30-eth0_g0_12:32:571
121510ksoftirqd/1121750irq/30-eth0_g0_12:05:521
121500ksoftirqd/1121750irq/30-eth0_g0_09:58:271
312862490sleep0121650irq/29-eth0_g0_11:46:030
121480ksoftirqd/1121750irq/30-eth0_g0_10:21:561
121750470irq/30-eth0_g0_121ksoftirqd/112:14:591
121650470irq/29-eth0_g0_31ksoftirqd/009:59:530
121470ksoftirqd/1121750irq/30-eth0_g0_11:21:101
121470ksoftirqd/1121750irq/30-eth0_g0_11:21:101
121450ksoftirqd/1121750irq/30-eth0_g0_12:04:381
204242440sleep0121750irq/30-eth0_g0_11:02:450
121750440irq/30-eth0_g0_470-21kworker/1:110:07:501
121750440irq/30-eth0_g0_121ksoftirqd/108:45:021
121750430irq/30-eth0_g0_470-21kworker/1:111:03:501
121750430irq/30-eth0_g0_470-21kworker/1:110:28:011
121650430irq/29-eth0_g0_1128-21unixbench_multi07:30:020
121430ksoftirqd/1121650irq/29-eth0_g0_11:43:341
121430ksoftirqd/1121650irq/29-eth0_g0_11:25:540
121430ksoftirqd/1121650irq/29-eth0_g0_08:09:221
121650420irq/29-eth0_g0_27423-21unixbench_multi07:05:010
121650420irq/29-eth0_g0_13-21kworker/0:112:14:520
121650420irq/29-eth0_g0_121ksoftirqd/110:14:270
121420ksoftirqd/1121750irq/30-eth0_g0_07:18:290
121750410irq/30-eth0_g0_470-21kworker/1:109:36:351
121750410irq/30-eth0_g0_277972sleep109:19:581
121650410irq/29-eth0_g0_31ksoftirqd/011:59:410
121650410irq/29-eth0_g0_31ksoftirqd/011:34:590
121650410irq/29-eth0_g0_13-21kworker/0:111:21:070
121650410irq/29-eth0_g0_13-21kworker/0:111:21:070
121410ksoftirqd/1121750irq/30-eth0_g0_10:21:310
121410ksoftirqd/1121750irq/30-eth0_g0_09:09:540
121410ksoftirqd/1121650irq/29-eth0_g0_11:30:351
121410ksoftirqd/1121650irq/29-eth0_g0_09:17:560
2793399401cyclictest18150-21sendmail_mailqu08:39:591
121750400irq/30-eth0_g0_2029-21runrttasks10:40:571
121750400irq/30-eth0_g0_0-21swapper/112:20:441
121750400irq/30-eth0_g0_0-21swapper/109:45:331
121650400irq/29-eth0_g0_9679-21/usr/sbin/munin12:30:010
121650400irq/29-eth0_g0_31ksoftirqd/011:39:520
121650400irq/29-eth0_g0_17744-21taskset08:39:500
121650400irq/29-eth0_g0_13-21kworker/0:110:36:250
121650400irq/29-eth0_g0_13-21kworker/0:109:31:050
121650400irq/29-eth0_g0_13-21kworker/0:109:24:570
121400ksoftirqd/1121750irq/30-eth0_g0_12:39:330
121400ksoftirqd/1121750irq/30-eth0_g0_11:53:200
2793399392cyclictest17244-21iostat10:49:551
2793399392cyclictest17244-21iostat10:49:551
157682390sleep02793299cyclictest08:30:010
157682390sleep02793299cyclictest08:30:010
121750390irq/30-eth0_g0_470-21kworker/1:109:12:591
121650390irq/29-eth0_g0_20876-21if_eth011:04:520
121650390irq/29-eth0_g0_13-21kworker/0:112:03:360
121650390irq/29-eth0_g0_121ksoftirqd/110:49:381
121650390irq/29-eth0_g0_121ksoftirqd/110:16:190
121390ksoftirqd/1121750irq/30-eth0_g0_10:58:480
121390ksoftirqd/1121750irq/30-eth0_g0_10:46:360
121390ksoftirqd/1121750irq/30-eth0_g0_10:30:180
121390ksoftirqd/1121750irq/30-eth0_g0_10:29:060
121390ksoftirqd/1121750irq/30-eth0_g0_10:08:240
121390ksoftirqd/1121750irq/30-eth0_g0_09:52:000
121390ksoftirqd/1121750irq/30-eth0_g0_09:42:010
121390ksoftirqd/1121750irq/30-eth0_g0_09:34:530
121390ksoftirqd/1121750irq/30-eth0_g0_08:51:510
121390ksoftirqd/1121750irq/30-eth0_g0_08:38:500
121390ksoftirqd/1121750irq/30-eth0_g0_08:11:350
121390ksoftirqd/1121750irq/30-eth0_g0_08:00:220
121390ksoftirqd/1121750irq/30-eth0_g0_07:55:270
121390ksoftirqd/1121750irq/30-eth0_g0_07:45:330
121390ksoftirqd/1121750irq/30-eth0_g0_07:43:340
121390ksoftirqd/1121750irq/30-eth0_g0_07:25:140
121390ksoftirqd/1121750irq/30-eth0_g0_07:24:160
27933993829cyclictest4165-21/usr/sbin/munin12:09:551
2793399381cyclictest756-21chrt07:29:561
2793399381cyclictest30718-21grep07:19:571
2793399381cyclictest21972-21grep08:55:021
2793399381cyclictest19426-21cat10:59:401
2793399381cyclictest13266-21sendmail_mailqu08:19:581
121750380irq/30-eth0_g0_470-21kworker/1:111:35:051
121750380irq/30-eth0_g0_470-21kworker/1:110:31:421
121750380irq/30-eth0_g0_470-21kworker/1:110:16:261
121750380irq/30-eth0_g0_20892-21if_eth011:04:521
121750380irq/30-eth0_g0_121ksoftirqd/111:52:421
121650380irq/29-eth0_g0_23200-21unixbench_singl09:00:010
121650380irq/29-eth0_g0_13-21kworker/0:111:34:090
121380ksoftirqd/1121750irq/30-eth0_g0_09:46:070
121380ksoftirqd/1121650irq/29-eth0_g0_08:25:301
121750370irq/30-eth0_g0_470-21kworker/1:112:38:481
121750370irq/30-eth0_g0_0-21swapper/111:58:021
121750370irq/30-eth0_g0_0-21swapper/111:29:361
121750370irq/30-eth0_g0_0-21swapper/109:42:451
121750370irq/30-eth0_g0_0-21swapper/109:18:091
121650370irq/29-eth0_g0_4823-21grep12:10:010
121650370irq/29-eth0_g0_31ksoftirqd/010:53:540
121650370irq/29-eth0_g0_31ksoftirqd/010:53:540
121650370irq/29-eth0_g0_2793299cyclictest09:05:010
121650370irq/29-eth0_g0_2793299cyclictest09:05:010
121370ksoftirqd/1121750irq/30-eth0_g0_12:27:440
121370ksoftirqd/1121750irq/30-eth0_g0_09:28:171
121370ksoftirqd/1121650irq/29-eth0_g0_07:35:571
2793399362cyclictest4176-21egrep07:44:511
2793399362cyclictest0-21swapper/107:25:011
2793399361cyclictest8428-21cat12:24:591
2793399361cyclictest3104-21chrt07:39:521
2793399361cyclictest29496-21expr07:14:561
2793399361cyclictest28398-21nfs_client07:09:571
2793399361cyclictest24871-21diskmemload10:34:521
2793399361cyclictest24269-21wc09:04:591
2793399361cyclictest24269-21wc09:04:591
2793399361cyclictest16953-21sendmail_mailtr08:35:001
121750360irq/30-eth0_g0_8571-21vmstat08:00:021
121750360irq/30-eth0_g0_2029-21runrttasks07:07:071
121650360irq/29-eth0_g0_2029-21runrttasks08:26:350
121650360irq/29-eth0_g0_2029-21runrttasks07:38:210
121650360irq/29-eth0_g0_19235-21seq08:44:580
121650360irq/29-eth0_g0_13-21kworker/0:109:21:060
121360ksoftirqd/1121650irq/29-eth0_g0_07:55:001
2793399351cyclictest11427-21grep08:14:411
121750350irq/30-eth0_g0_23049-21sendmail_mailqu08:59:591
121650350irq/29-eth0_g0_5927-21find07:49:590
121650350irq/29-eth0_g0_2029-21runrttasks08:05:000
121650350irq/29-eth0_g0_2029-21runrttasks07:10:460
121650340irq/29-eth0_g0_21505-21if_eth008:54:540
121650340irq/29-eth0_g0_12989-21sed08:19:530
121650340irq/29-eth0_g0_0-21swapper/008:14:520
121340ksoftirqd/1121650irq/29-eth0_g0_08:15:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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