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2026-03-30 - 17:00

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 Mon Mar 30, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211100ksoftirqd/1121750irq/30-eth0_g0_07:40:031
167662880chrt121750irq/30-eth0_g0_07:55:100
121760ksoftirqd/1121750irq/30-eth0_g0_10:14:301
155932750sleep0121750irq/30-eth0_g0_12:15:070
74252730sleep1121750irq/30-eth0_g0_07:19:481
123302680sleep1121750irq/30-eth0_g0_12:02:391
120282670chrt121750irq/30-eth0_g0_09:49:591
121620ksoftirqd/1121750irq/30-eth0_g0_08:38:001
121610ksoftirqd/1121750irq/30-eth0_g0_10:50:161
121610ksoftirqd/1121750irq/30-eth0_g0_10:50:161
312152520sleep0121650irq/29-eth0_g0_11:07:160
275312510sleep1121750irq/30-eth0_g0_08:40:031
102112500sleep1121650irq/29-eth0_g0_09:40:301
121490ksoftirqd/1121650irq/29-eth0_g0_09:51:370
121750480irq/30-eth0_g0_1219-21kworker/1:212:31:341
121480ksoftirqd/1121750irq/30-eth0_g0_10:36:571
121480ksoftirqd/1121750irq/30-eth0_g0_09:30:051
121470ksoftirqd/1121750irq/30-eth0_g0_12:26:191
121470ksoftirqd/1121750irq/30-eth0_g0_12:11:181
121470ksoftirqd/1121650irq/29-eth0_g0_12:28:000
121460ksoftirqd/1121750irq/30-eth0_g0_11:51:531
121460ksoftirqd/1121650irq/29-eth0_g0_11:34:500
121460ksoftirqd/1121650irq/29-eth0_g0_09:15:361
121460ksoftirqd/1121650irq/29-eth0_g0_09:12:320
121650450irq/29-eth0_g0_31ksoftirqd/009:31:450
121650440irq/29-eth0_g0_240392sleep010:39:240
121650440irq/29-eth0_g0_1875-21runrttasks07:09:070
121650440irq/29-eth0_g0_14297-21ls09:59:470
121440ksoftirqd/1121750irq/30-eth0_g0_09:28:301
121440ksoftirqd/1121650irq/29-eth0_g0_08:51:381
121430ksoftirqd/1121650irq/29-eth0_g0_11:49:130
121430ksoftirqd/1121650irq/29-eth0_g0_11:49:130
121430ksoftirqd/1121650irq/29-eth0_g0_10:55:141
121430ksoftirqd/1121650irq/29-eth0_g0_10:24:171
302982420sleep0121650irq/29-eth0_g0_08:50:090
121750420irq/30-eth0_g0_1219-21kworker/1:211:02:121
121650420irq/29-eth0_g0_11689-21sort12:00:020
121420ksoftirqd/1121650irq/29-eth0_g0_10:03:471
53212410sleep0121750irq/30-eth0_g0_09:20:420
209232410sleep0121650irq/29-eth0_g0_12:37:470
121750410irq/30-eth0_g0_1219-21kworker/1:211:45:481
121750410irq/30-eth0_g0_1219-21kworker/1:211:45:481
121750410irq/30-eth0_g0_1219-21kworker/1:211:26:411
121650410irq/29-eth0_g0_121ksoftirqd/109:55:051
121410ksoftirqd/1121750irq/30-eth0_g0_11:40:110
121410ksoftirqd/1121650irq/29-eth0_g0_12:05:031
121410ksoftirqd/1121650irq/29-eth0_g0_11:34:281
121410ksoftirqd/1121650irq/29-eth0_g0_08:45:021
121410ksoftirqd/1121650irq/29-eth0_g0_08:45:021
121750400irq/30-eth0_g0_1219-21kworker/1:209:45:171
121650400irq/29-eth0_g0_13-21kworker/0:111:23:450
121650400irq/29-eth0_g0_13-21kworker/0:109:43:470
121400ksoftirqd/1121750irq/30-eth0_g0_10:43:230
121400ksoftirqd/1121650irq/29-eth0_g0_09:17:420
227692390sleep0121650irq/29-eth0_g0_10:33:530
121750390irq/30-eth0_g0_1219-21kworker/1:211:43:561
121750390irq/30-eth0_g0_1219-21kworker/1:211:05:461
121750390irq/30-eth0_g0_121ksoftirqd/110:41:231
121750390irq/30-eth0_g0_121ksoftirqd/109:07:201
121650390irq/29-eth0_g0_8218-21/usr/sbin/munin09:34:570
121650390irq/29-eth0_g0_31ksoftirqd/010:55:410
121650390irq/29-eth0_g0_1875-21runrttasks10:21:080
121650390irq/29-eth0_g0_13-21kworker/0:112:07:410
121650390irq/29-eth0_g0_13-21kworker/0:111:59:350
121650390irq/29-eth0_g0_13-21kworker/0:111:27:580
121650390irq/29-eth0_g0_13-21kworker/0:110:49:470
121390ksoftirqd/1121750irq/30-eth0_g0_12:33:430
121390ksoftirqd/1121750irq/30-eth0_g0_07:32:190
121390ksoftirqd/1121750irq/30-eth0_g0_07:32:190
497399381cyclictest17288-21cat07:59:481
121750380irq/30-eth0_g0_3958-21sed07:04:591
121750380irq/30-eth0_g0_1219-21kworker/1:212:15:391
121750380irq/30-eth0_g0_1219-21kworker/1:209:22:061
121750380irq/30-eth0_g0_1219-21kworker/1:209:11:031
121650380irq/29-eth0_g0_21559-21sendmail_mailtr08:15:070
121650380irq/29-eth0_g0_1987-21diskmemload10:11:350
121650380irq/29-eth0_g0_1875-21runrttasks09:04:440
121650380irq/29-eth0_g0_1875-21runrttasks07:21:020
121650380irq/29-eth0_g0_14269-21unixbench_multi07:45:090
121650380irq/29-eth0_g0_13-21kworker/0:111:52:430
121650380irq/29-eth0_g0_13-21kworker/0:110:05:430
121650380irq/29-eth0_g0_13-21kworker/0:110:00:550
121380ksoftirqd/124620-21seq08:29:481
121380ksoftirqd/1121750irq/30-eth0_g0_09:46:450
121380ksoftirqd/1121650irq/29-eth0_g0_12:35:081
497399372cyclictest21160-21grep10:25:101
497399371cyclictest10258-21memory07:30:021
497399371cyclictest10258-21memory07:30:021
497399370cyclictest0-21swapper/108:57:131
121750370irq/30-eth0_g0_1219-21kworker/1:211:12:131
121750370irq/30-eth0_g0_1219-21kworker/1:210:06:301
121750370irq/30-eth0_g0_0-21swapper/110:30:091
121650370irq/29-eth0_g0_29617-21sendmail_mailst11:00:070
121650370irq/29-eth0_g0_27295-21unixbench_singl10:50:090
121650370irq/29-eth0_g0_27295-21unixbench_singl10:50:090
121650370irq/29-eth0_g0_22887-21unixbench_multi08:20:090
121650370irq/29-eth0_g0_1875-21runrttasks11:13:520
121650370irq/29-eth0_g0_1875-21runrttasks08:10:230
121650370irq/29-eth0_g0_1875-21runrttasks08:08:560
121650370irq/29-eth0_g0_1875-21runrttasks08:02:110
121650370irq/29-eth0_g0_1875-21runrttasks07:12:170
121650370irq/29-eth0_g0_13-21kworker/0:111:32:390
121650370irq/29-eth0_g0_13-21kworker/0:111:15:470
121650370irq/29-eth0_g0_13-21kworker/0:110:15:450
121650370irq/29-eth0_g0_12421-21/usr/sbin/munin07:39:590
121650370irq/29-eth0_g0_121ksoftirqd/111:15:171
121370ksoftirqd/1121750irq/30-eth0_g0_07:25:011
121370ksoftirqd/1121650irq/29-eth0_g0_08:05:081
497399361cyclictest7585-21df07:20:001
497399361cyclictest5489-21seq11:35:011
497399361cyclictest32584-21sendmail_mailst09:00:061
497399361cyclictest21676-21unixbench_singl08:15:081
497399361cyclictest20236-21/usr/sbin/munin08:10:071
497399361cyclictest1987-21diskmemload10:48:571
497399361cyclictest17552-21iostat08:00:001
497399361cyclictest15010-21df_abs07:50:001
497399361cyclictest14290-21tail07:45:091
121750360irq/30-eth0_g0_497399cyclictest11:24:471
121750360irq/30-eth0_g0_121ksoftirqd/111:59:031
121650360irq/29-eth0_g0_28909-21mailstats08:45:070
121650360irq/29-eth0_g0_28909-21mailstats08:45:070
121650360irq/29-eth0_g0_1875-21runrttasks12:13:320
121650360irq/29-eth0_g0_1875-21runrttasks09:07:100
121650360irq/29-eth0_g0_1875-21runrttasks08:56:150
121650360irq/29-eth0_g0_1875-21runrttasks08:42:090
121650360irq/29-eth0_g0_1875-21runrttasks07:27:590
121650360irq/29-eth0_g0_1875-21runrttasks07:16:450
121650360irq/29-eth0_g0_13-21kworker/0:112:20:530
121650360irq/29-eth0_g0_13-21kworker/0:110:27:050
121650360irq/29-eth0_g0_13-21kworker/0:109:24:550
121650360irq/29-eth0_g0_11590-21grep07:35:040
497399351cyclictest8926-21unixbench_singl09:35:081
497399351cyclictest5138-21sed07:10:021
497399351cyclictest18108-21grep10:15:001
121750350irq/30-eth0_g0_1219-21kworker/1:212:23:121
121650350irq/29-eth0_g0_26596-21unixbench_singl08:35:080
121650350irq/29-eth0_g0_25385-21unixbench_singl08:30:100
121650350irq/29-eth0_g0_1875-21runrttasks08:25:260
121650350irq/29-eth0_g0_15474-21sort07:50:080
497399341cyclictest25003-21missed_timers08:30:031
497399341cyclictest11569-21awk07:35:031
497399331cyclictest22690-21ps08:20:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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