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2026-07-20 - 01:49

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 Mon Jul 20, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1839821740sleep1121650irq/29-eth0_g0_00:07:511
1211050ksoftirqd/1121750irq/30-eth0_g0_22:53:461
1556221020sleep0121750irq/30-eth0_g0_23:54:110
121940ksoftirqd/1121750irq/30-eth0_g0_23:03:571
121720ksoftirqd/1121750irq/30-eth0_g0_19:29:491
310622690sleep0121750irq/30-eth0_g0_22:46:510
180472670sleep1121750irq/30-eth0_g0_00:04:411
112722660sleep1121750irq/30-eth0_g0_23:37:551
222962550chrt121650irq/29-eth0_g0_22:09:300
121520ksoftirqd/1121750irq/30-eth0_g0_22:36:321
121510ksoftirqd/1121750irq/30-eth0_g0_23:18:111
121510ksoftirqd/1121750irq/30-eth0_g0_00:22:011
121500ksoftirqd/1121750irq/30-eth0_g0_19:55:240
155042480sleep0121650irq/29-eth0_g0_21:42:540
121480ksoftirqd/1121650irq/29-eth0_g0_21:26:590
296122470sleep1121650irq/29-eth0_g0_22:39:101
121470ksoftirqd/1121750irq/30-eth0_g0_21:50:281
206172460sleep0121650irq/29-eth0_g0_00:16:040
121460ksoftirqd/1121750irq/30-eth0_g0_23:28:091
121460ksoftirqd/1121750irq/30-eth0_g0_22:31:561
121460ksoftirqd/1121750irq/30-eth0_g0_22:02:531
121460ksoftirqd/1121650irq/29-eth0_g0_19:20:521
121650450irq/29-eth0_g0_1964-21runrttasks19:05:210
121450ksoftirqd/11040499cyclictest22:21:241
121650440irq/29-eth0_g0_1964-21runrttasks22:58:110
121650440irq/29-eth0_g0_13-21kworker/0:121:09:330
121650440irq/29-eth0_g0_13-21kworker/0:121:09:330
121650440irq/29-eth0_g0_121ksoftirqd/100:30:031
121440ksoftirqd/1121750irq/30-eth0_g0_23:57:421
121440ksoftirqd/1121750irq/30-eth0_g0_23:57:031
121440ksoftirqd/1121750irq/30-eth0_g0_21:38:271
121440ksoftirqd/1121750irq/30-eth0_g0_19:42:240
121440ksoftirqd/1121650irq/29-eth0_g0_21:37:340
121440ksoftirqd/1121650irq/29-eth0_g0_00:17:181
121650430irq/29-eth0_g0_31ksoftirqd/023:37:590
121650430irq/29-eth0_g0_1964-21runrttasks20:32:590
121650430irq/29-eth0_g0_13-21kworker/0:122:24:390
121650430irq/29-eth0_g0_13-21kworker/0:121:32:260
121430ksoftirqd/1121750irq/30-eth0_g0_23:10:361
121750420irq/30-eth0_g0_1219-21kworker/1:223:36:421
121650420irq/29-eth0_g0_44732sleep023:08:260
121650420irq/29-eth0_g0_24515-21/usr/sbin/munin00:32:540
121650420irq/29-eth0_g0_1964-21runrttasks23:29:170
121650420irq/29-eth0_g0_13-21kworker/0:100:22:520
121420ksoftirqd/1121650irq/29-eth0_g0_23:44:230
121420ksoftirqd/1121650irq/29-eth0_g0_23:17:161
121420ksoftirqd/1121650irq/29-eth0_g0_22:44:171
121650410irq/29-eth0_g0_31ksoftirqd/023:59:550
121650410irq/29-eth0_g0_31ksoftirqd/023:04:230
121650410irq/29-eth0_g0_31ksoftirqd/000:03:050
121650410irq/29-eth0_g0_121ksoftirqd/121:14:130
1040499412cyclictest28875-21/usr/sbin/munin20:22:521
121750400irq/30-eth0_g0_9432-21/usr/sbin/munin19:02:541
121750400irq/30-eth0_g0_31ksoftirqd/000:18:020
121750400irq/30-eth0_g0_22299-21iostat00:22:541
121750400irq/30-eth0_g0_121ksoftirqd/121:31:511
121650400irq/29-eth0_g0_136352sleep121:33:311
121650400irq/29-eth0_g0_13-21kworker/0:123:35:070
121650400irq/29-eth0_g0_121ksoftirqd/122:47:490
121400ksoftirqd/1121750irq/30-eth0_g0_23:51:080
121400ksoftirqd/1121750irq/30-eth0_g0_22:42:220
121400ksoftirqd/1121650irq/29-eth0_g0_22:59:501
1040499401cyclictest22140-21grep22:08:031
234702390sleep0121650irq/29-eth0_g0_22:13:580
121750390irq/30-eth0_g0_188082sleep121:56:431
121750390irq/30-eth0_g0_14031-21grep23:48:011
121750390irq/30-eth0_g0_12282-21/usr/sbin/munin23:42:521
121750390irq/30-eth0_g0_1219-21kworker/1:222:48:501
121750390irq/30-eth0_g0_1219-21kworker/1:221:19:471
121750390irq/30-eth0_g0_121ksoftirqd/122:13:111
121650390irq/29-eth0_g0_23858-21latency_hist20:02:420
121650390irq/29-eth0_g0_20930-21uptime22:03:050
121650390irq/29-eth0_g0_13-21kworker/0:122:27:520
121650390irq/29-eth0_g0_13-21kworker/0:121:42:170
121650390irq/29-eth0_g0_121ksoftirqd/121:59:260
121390ksoftirqd/1121750irq/30-eth0_g0_23:24:140
121390ksoftirqd/1121750irq/30-eth0_g0_21:53:520
121390ksoftirqd/1121750irq/30-eth0_g0_21:50:420
121390ksoftirqd/1121750irq/30-eth0_g0_21:03:350
121390ksoftirqd/1121750irq/30-eth0_g0_20:38:170
121390ksoftirqd/1121750irq/30-eth0_g0_20:13:410
121390ksoftirqd/1121750irq/30-eth0_g0_20:03:560
121390ksoftirqd/1121750irq/30-eth0_g0_19:51:280
121390ksoftirqd/1121750irq/30-eth0_g0_19:33:500
121390ksoftirqd/1121750irq/30-eth0_g0_19:22:130
121390ksoftirqd/1121750irq/30-eth0_g0_00:31:230
121390ksoftirqd/1121650irq/29-eth0_g0_20:39:431
121390ksoftirqd/1121650irq/29-eth0_g0_20:28:041
121390ksoftirqd/1121650irq/29-eth0_g0_20:13:021
121390ksoftirqd/1121650irq/29-eth0_g0_19:59:411
121390ksoftirqd/1121650irq/29-eth0_g0_19:47:441
1040499391cyclictest5586-21tail20:58:061
121750380irq/30-eth0_g0_25543-21chrt22:22:591
121750380irq/30-eth0_g0_1219-21kworker/1:222:01:261
121750380irq/30-eth0_g0_0-21swapper/121:24:511
121650380irq/29-eth0_g0_1964-21runrttasks19:44:390
121650380irq/29-eth0_g0_13-21kworker/0:123:14:200
121650380irq/29-eth0_g0_13-21kworker/0:121:18:530
121650380irq/29-eth0_g0_13-21kworker/0:100:09:550
121380ksoftirqd/1121750irq/30-eth0_g0_22:35:200
121380ksoftirqd/1121750irq/30-eth0_g0_19:07:570
121380ksoftirqd/1121750irq/30-eth0_g0_19:07:570
121380ksoftirqd/1121650irq/29-eth0_g0_20:18:051
1040499382cyclictest21865-21awk19:53:001
1040499381cyclictest7306-21diskmemload21:44:231
1040499381cyclictest253002sleep100:33:371
121750370irq/30-eth0_g0_1911-21grep20:43:001
121750370irq/30-eth0_g0_1219-21kworker/1:221:09:391
121750370irq/30-eth0_g0_1219-21kworker/1:221:09:391
121750370irq/30-eth0_g0_121ksoftirqd/123:22:451
121650370irq/29-eth0_g0_5144-21chrt20:57:570
121650370irq/29-eth0_g0_29254-21open_inodes20:23:000
121650370irq/29-eth0_g0_13-21kworker/0:123:19:420
121370ksoftirqd/1121650irq/29-eth0_g0_20:48:121
121750360irq/30-eth0_g0_1219-21kworker/1:221:12:471
121650360irq/29-eth0_g0_30667-21sed20:28:030
121650360irq/29-eth0_g0_31ksoftirqd/022:57:320
121650360irq/29-eth0_g0_27900-21expr20:17:560
121650360irq/29-eth0_g0_1964-21runrttasks19:23:440
121650360irq/29-eth0_g0_15850-21ps19:28:020
121650360irq/29-eth0_g0_13-21kworker/0:122:18:020
121360ksoftirqd/1121650irq/29-eth0_g0_19:16:221
1040499361cyclictest31895-21sed20:33:031
1040499361cyclictest14785-21unixbench_multi19:23:031
121750350irq/30-eth0_g0_24661-21vmstat20:03:101
121650350irq/29-eth0_g0_3109-21ls20:48:020
121650350irq/29-eth0_g0_1964-21runrttasks20:12:330
1040499351cyclictest6826-21grep21:03:041
1040499351cyclictest4115-21awk20:52:591
1040499351cyclictest19572-21find19:42:591
1040499351cyclictest18013-21if_err_eth019:37:561
1040499351cyclictest0-21swapper/119:36:421
121650340irq/29-eth0_g0_4252-21rt-features20:53:020
121650340irq/29-eth0_g0_1964-21runrttasks20:45:300
121650340irq/29-eth0_g0_12913-21sort19:17:420
1040499341cyclictest11021-21grep19:08:011
1040499341cyclictest11021-21grep19:08:011
121750330irq/30-eth0_g0_25377-21/usr/sbin/munin20:07:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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