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2026-04-04 - 05:40

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 Sat Apr 04, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2074021350sleep0121750irq/30-eth0_g0_23:10:490
1211100ksoftirqd/1121750irq/30-eth0_g0_19:14:551
2512621020sleep1121750irq/30-eth0_g0_21:17:431
121860ksoftirqd/1121750irq/30-eth0_g0_23:25:161
71892650sleep1121750irq/30-eth0_g0_00:29:481
287142550sleep1121650irq/29-eth0_g0_21:31:371
121510ksoftirqd/1121750irq/30-eth0_g0_19:26:441
121500ksoftirqd/1121750irq/30-eth0_g0_22:49:511
121500ksoftirqd/1121750irq/30-eth0_g0_22:02:291
121480ksoftirqd/1121650irq/29-eth0_g0_21:34:411
121470ksoftirqd/1121750irq/30-eth0_g0_22:35:271
121470ksoftirqd/1121650irq/29-eth0_g0_20:58:591
147472460sleep0121650irq/29-eth0_g0_22:47:210
121750460irq/30-eth0_g0_121ksoftirqd/123:11:001
121460ksoftirqd/1121750irq/30-eth0_g0_00:05:511
121460ksoftirqd/1121650irq/29-eth0_g0_22:14:381
106552460sleep1121750irq/30-eth0_g0_22:29:561
121650450irq/29-eth0_g0_31ksoftirqd/023:09:150
121450ksoftirqd/1121650irq/29-eth0_g0_21:46:431
121450ksoftirqd/1121650irq/29-eth0_g0_21:15:150
121750440irq/30-eth0_g0_121ksoftirqd/100:09:561
121440ksoftirqd/1121650irq/29-eth0_g0_00:18:570
121650430irq/29-eth0_g0_25373-21unixbench_singl19:04:580
121430ksoftirqd/1121650irq/29-eth0_g0_23:42:331
121430ksoftirqd/1121650irq/29-eth0_g0_20:29:561
121750420irq/30-eth0_g0_13716-21munin-run22:44:371
121650420irq/29-eth0_g0_121ksoftirqd/122:33:300
121750410irq/30-eth0_g0_121ksoftirqd/123:05:411
121650410irq/29-eth0_g0_13-21kworker/0:121:19:520
121650410irq/29-eth0_g0_13-21kworker/0:121:09:560
121650410irq/29-eth0_g0_121ksoftirqd/121:09:371
121410ksoftirqd/1121750irq/30-eth0_g0_00:12:300
121410ksoftirqd/1121650irq/29-eth0_g0_22:25:521
25834994011cyclictest0-21swapper/122:24:081
2583499401cyclictest16391-21df22:54:491
2583499401cyclictest11278-21timerandwakeup20:19:591
121750400irq/30-eth0_g0_25076-21awk19:04:531
121750400irq/30-eth0_g0_1219-21kworker/1:221:51:521
121750400irq/30-eth0_g0_1219-21kworker/1:200:19:501
121750400irq/30-eth0_g0_121ksoftirqd/123:54:100
121650400irq/29-eth0_g0_31ksoftirqd/000:01:460
121650400irq/29-eth0_g0_13815-21taskset20:29:580
121650400irq/29-eth0_g0_13-21kworker/0:123:40:470
121650400irq/29-eth0_g0_13-21kworker/0:122:58:540
121650400irq/29-eth0_g0_13-21kworker/0:122:39:490
121650400irq/29-eth0_g0_13-21kworker/0:121:33:560
121650400irq/29-eth0_g0_13-21kworker/0:100:33:230
121650400irq/29-eth0_g0_0-21swapper/020:16:590
121400ksoftirqd/1121750irq/30-eth0_g0_23:21:480
121400ksoftirqd/1121750irq/30-eth0_g0_22:22:180
121400ksoftirqd/1121750irq/30-eth0_g0_22:08:550
121400ksoftirqd/1121750irq/30-eth0_g0_20:29:200
2583499391cyclictest26528-21wc19:09:591
2583499391cyclictest12567-21grep20:24:581
121750390irq/30-eth0_g0_1219-21kworker/1:222:49:261
121750390irq/30-eth0_g0_1219-21kworker/1:200:26:471
121750390irq/30-eth0_g0_121ksoftirqd/121:29:301
121650390irq/29-eth0_g0_13-21kworker/0:123:16:240
121650390irq/29-eth0_g0_13-21kworker/0:122:59:470
121650390irq/29-eth0_g0_13-21kworker/0:122:01:570
121650390irq/29-eth0_g0_13-21kworker/0:121:46:460
121650390irq/29-eth0_g0_13-21kworker/0:121:35:340
121650390irq/29-eth0_g0_13-21kworker/0:100:27:490
121650390irq/29-eth0_g0_13-21kworker/0:100:04:470
121390ksoftirqd/1121750irq/30-eth0_g0_23:38:400
121390ksoftirqd/1121750irq/30-eth0_g0_23:30:460
121390ksoftirqd/1121750irq/30-eth0_g0_23:29:240
121390ksoftirqd/1121750irq/30-eth0_g0_21:56:220
121390ksoftirqd/1121750irq/30-eth0_g0_21:49:550
121390ksoftirqd/1121750irq/30-eth0_g0_21:27:160
121390ksoftirqd/1121750irq/30-eth0_g0_20:59:450
121390ksoftirqd/1121750irq/30-eth0_g0_20:50:160
121390ksoftirqd/1121750irq/30-eth0_g0_20:41:560
121390ksoftirqd/1121750irq/30-eth0_g0_20:11:560
121390ksoftirqd/1121750irq/30-eth0_g0_20:07:440
121390ksoftirqd/1121750irq/30-eth0_g0_20:07:440
121390ksoftirqd/1121750irq/30-eth0_g0_19:38:220
121390ksoftirqd/1121750irq/30-eth0_g0_19:29:430
121390ksoftirqd/1121750irq/30-eth0_g0_00:36:480
121390ksoftirqd/1121750irq/30-eth0_g0_00:20:290
121390ksoftirqd/1121650irq/29-eth0_g0_23:55:581
121390ksoftirqd/1121650irq/29-eth0_g0_19:57:511
121390ksoftirqd/1121650irq/29-eth0_g0_00:35:161
2583499382cyclictest17938-21cat20:49:381
2583499382cyclictest15747-21if_err_eth020:39:501
2583499381cyclictest3994-21unixbench_singl19:49:591
2583499381cyclictest18729-21grep20:49:581
121750380irq/30-eth0_g0_6248-21seq19:59:551
121750380irq/30-eth0_g0_6248-21seq19:59:551
121750380irq/30-eth0_g0_18022-21sendmail_mailqu22:59:571
121750380irq/30-eth0_g0_1219-21kworker/1:223:59:521
121750380irq/30-eth0_g0_121ksoftirqd/123:45:541
121750380irq/30-eth0_g0_121ksoftirqd/123:45:541
121750380irq/30-eth0_g0_121ksoftirqd/123:34:551
121750380irq/30-eth0_g0_121ksoftirqd/122:05:361
121750380irq/30-eth0_g0_121ksoftirqd/100:15:331
121650380irq/29-eth0_g0_2583399cyclictest22:26:190
121650380irq/29-eth0_g0_22874-21latency_hist21:09:370
121650380irq/29-eth0_g0_1875-21runrttasks20:46:420
121650380irq/29-eth0_g0_13-21kworker/0:122:37:550
121650380irq/29-eth0_g0_13-21kworker/0:122:10:350
121650380irq/29-eth0_g0_13-21kworker/0:121:40:450
121380ksoftirqd/1121750irq/30-eth0_g0_23:48:340
121380ksoftirqd/1121750irq/30-eth0_g0_23:48:340
121380ksoftirqd/1121750irq/30-eth0_g0_21:19:521
121380ksoftirqd/1121650irq/29-eth0_g0_23:49:501
121380ksoftirqd/1121650irq/29-eth0_g0_23:29:441
121380ksoftirqd/1121650irq/29-eth0_g0_23:20:431
2583499371cyclictest32359-21sort19:34:521
2583499371cyclictest14479-21grep20:34:491
121750370irq/30-eth0_g0_9443-21/usr/sbin/munin20:14:481
121750370irq/30-eth0_g0_1219-21kworker/1:222:12:101
121750370irq/30-eth0_g0_1219-21kworker/1:221:43:221
121750370irq/30-eth0_g0_121ksoftirqd/123:17:441
121750370irq/30-eth0_g0_121ksoftirqd/121:56:271
121650370irq/29-eth0_g0_1875-21runrttasks20:02:100
121650370irq/29-eth0_g0_1875-21runrttasks20:02:100
121650370irq/29-eth0_g0_13-21kworker/0:123:54:560
121650370irq/29-eth0_g0_0-21swapper/022:19:020
121370ksoftirqd/1121650irq/29-eth0_g0_21:09:511
2583499361cyclictest7072-21df_abs20:04:501
2583499361cyclictest7072-21df_abs20:04:501
2583499361cyclictest29037-21unixbench_multi19:19:591
2583499361cyclictest20476-21/usr/sbin/munin20:59:551
2583499361cyclictest1504-21grep19:39:581
24242360sleep10-21swapper/119:44:521
121750360irq/30-eth0_g0_0-21swapper/120:10:171
121650360irq/29-eth0_g0_30068-21runrttasks19:24:550
121650360irq/29-eth0_g0_2300-21/usr/sbin/munin19:44:490
121650360irq/29-eth0_g0_1875-21runrttasks20:57:150
121650360irq/29-eth0_g0_15726-21sed22:49:590
121650360irq/29-eth0_g0_11228-21sendmail_mailtr20:19:580
121650360irq/29-eth0_g0_0-21swapper/019:14:550
121650350irq/29-eth0_g0_1875-21runrttasks19:57:490
121650350irq/29-eth0_g0_1875-21runrttasks19:52:510
121650350irq/29-eth0_g0_1875-21runrttasks19:21:530
121650350irq/29-eth0_g0_0-21swapper/020:34:530
121650350irq/29-eth0_g0_0-21swapper/019:09:500
121650340irq/29-eth0_g0_1233-21ntp_offset19:39:540
2583499331cyclictest0-21swapper/119:29:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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