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2026-08-07 - 16:43

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 Fri Aug 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28412570sleep0121750irq/30-eth0_g0_09:57:100
305342550sleep0121650irq/29-eth0_g0_09:37:120
170802540sleep1121750irq/30-eth0_g0_10:54:371
121650530irq/29-eth0_g0_2563799cyclictest08:57:160
121530ksoftirqd/1121750irq/30-eth0_g0_12:35:521
121650520irq/29-eth0_g0_2563799cyclictest08:32:180
121500ksoftirqd/1121750irq/30-eth0_g0_09:36:051
121500ksoftirqd/1121650irq/29-eth0_g0_12:18:381
121750490irq/30-eth0_g0_2563799cyclictest09:32:150
121650490irq/29-eth0_g0_2563799cyclictest09:54:180
121650480irq/29-eth0_g0_2563799cyclictest12:16:010
121650480irq/29-eth0_g0_2563799cyclictest07:32:140
121470ksoftirqd/1121750irq/30-eth0_g0_10:42:351
25637994622cyclictest3880-21/usr/sbin/munin10:02:140
121750460irq/30-eth0_g0_2563799cyclictest11:15:510
121750460irq/30-eth0_g0_2563799cyclictest09:50:100
121650460irq/29-eth0_g0_2563799cyclictest12:07:160
121650460irq/29-eth0_g0_2563799cyclictest11:41:500
121650460irq/29-eth0_g0_2563799cyclictest09:22:290
121750450irq/30-eth0_g0_2563799cyclictest09:11:420
121650450irq/29-eth0_g0_2563799cyclictest07:47:150
121450ksoftirqd/1121650irq/29-eth0_g0_10:58:100
121650440irq/29-eth0_g0_2563799cyclictest12:27:180
121650440irq/29-eth0_g0_2563799cyclictest12:27:180
121650440irq/29-eth0_g0_2563799cyclictest09:42:120
2563799433cyclictest121650irq/29-eth0_g0_12:21:240
121750430irq/30-eth0_g0_8444-21ntpq08:07:141
121650430irq/29-eth0_g0_2563799cyclictest10:34:220
2563799427cyclictest0-21swapper/007:41:570
2563799421cyclictest26812sleep007:42:430
2563799421cyclictest14023-21missed_timers10:42:120
2563799421cyclictest121650irq/29-eth0_g0_08:19:430
121750420irq/30-eth0_g0_8089-21seq12:30:451
121750420irq/30-eth0_g0_8089-21seq12:30:451
121750420irq/30-eth0_g0_1219-21kworker/1:210:06:571
121750420irq/30-eth0_g0_10968-21ps08:17:151
121650420irq/29-eth0_g0_25139-21unixbench_multi07:02:180
73982410sleep0121650irq/29-eth0_g0_10:16:120
25638994126cyclictest1964-21runrttasks08:30:071
2563799415cyclictest121650irq/29-eth0_g0_08:52:170
2563799413cyclictest121650irq/29-eth0_g0_11:42:140
2563799412cyclictest121650irq/29-eth0_g0_08:07:190
2563799411cyclictest58852sleep012:22:080
2563799411cyclictest121650irq/29-eth0_g0_07:57:170
2563799411cyclictest10699-21unixbench_singl10:27:180
2563799411cyclictest10699-21unixbench_singl10:27:180
121750410irq/30-eth0_g0_2563799cyclictest11:57:090
121750410irq/30-eth0_g0_24793-21cat07:02:121
121650410irq/29-eth0_g0_2563799cyclictest11:35:090
121650410irq/29-eth0_g0_2563799cyclictest11:35:090
121650410irq/29-eth0_g0_2563799cyclictest11:03:480
121650410irq/29-eth0_g0_2563799cyclictest10:21:570
121410ksoftirqd/1121650irq/29-eth0_g0_10:14:301
121410ksoftirqd/1121650irq/29-eth0_g0_09:02:581
121410ksoftirqd/1121650irq/29-eth0_g0_07:29:071
2563799408cyclictest121650irq/29-eth0_g0_12:02:130
2563799407cyclictest121650irq/29-eth0_g0_07:52:170
2563799402cyclictest121650irq/29-eth0_g0_11:56:430
2563799402cyclictest0-21swapper/010:39:460
2563799402cyclictest0-21swapper/008:42:170
25637994016cyclictest27266-21grep07:12:120
2563799401cyclictest9113-21ls10:22:130
2563799401cyclictest28284-21expr09:27:160
121750400irq/30-eth0_g0_2563799cyclictest12:33:470
121750400irq/30-eth0_g0_2563799cyclictest11:30:380
121750400irq/30-eth0_g0_1219-21kworker/1:211:21:001
121650400irq/29-eth0_g0_2563799cyclictest11:51:390
121650400irq/29-eth0_g0_2563799cyclictest09:14:040
121400ksoftirqd/1121750irq/30-eth0_g0_11:17:290
121400ksoftirqd/1121650irq/29-eth0_g0_11:45:011
121400ksoftirqd/1121650irq/29-eth0_g0_10:58:211
121400ksoftirqd/1121650irq/29-eth0_g0_10:47:091
121400ksoftirqd/1121650irq/29-eth0_g0_09:38:421
121400ksoftirqd/1121650irq/29-eth0_g0_09:31:511
121400ksoftirqd/1121650irq/29-eth0_g0_07:43:401
2563799392cyclictest25870-21unixbench_multi09:17:180
2563799392cyclictest121650irq/29-eth0_g0_08:47:540
2563799392cyclictest0-21swapper/007:29:490
25637993919cyclictest16266-21df_abs10:52:080
25637993915cyclictest15479-21/usr/sbin/munin10:47:160
25637993912cyclictest1964-21runrttasks11:24:310
121750390irq/30-eth0_g0_1699-21memory09:52:121
121750390irq/30-eth0_g0_1219-21kworker/1:212:02:031
121750390irq/30-eth0_g0_1219-21kworker/1:211:49:211
121750390irq/30-eth0_g0_1219-21kworker/1:211:34:231
121750390irq/30-eth0_g0_1219-21kworker/1:211:34:231
121750390irq/30-eth0_g0_1219-21kworker/1:210:22:501
121750390irq/30-eth0_g0_1219-21kworker/1:209:20:031
121750390irq/30-eth0_g0_1219-21kworker/1:209:16:081
121750390irq/30-eth0_g0_1218-21awk07:37:161
121650390irq/29-eth0_g0_1964-21runrttasks08:13:461
121390ksoftirqd/1121650irq/29-eth0_g0_10:29:191
121390ksoftirqd/1121650irq/29-eth0_g0_10:29:191
121390ksoftirqd/1121650irq/29-eth0_g0_08:42:491
2563799387cyclictest0-21swapper/008:13:030
2563799387cyclictest0-21swapper/007:24:240
25637993812cyclictest12108-21/usr/sbin/munin08:22:140
2563799381cyclictest15947-21sendmail_mailqu08:37:150
121750380irq/30-eth0_g0_6893-21df08:02:131
121750380irq/30-eth0_g0_1219-21kworker/1:211:56:031
121750380irq/30-eth0_g0_1219-21kworker/1:211:29:361
121750380irq/30-eth0_g0_1219-21kworker/1:211:15:241
121750380irq/30-eth0_g0_1219-21kworker/1:211:02:111
121750380irq/30-eth0_g0_1219-21kworker/1:210:18:351
121750380irq/30-eth0_g0_1219-21kworker/1:210:08:071
121750380irq/30-eth0_g0_1219-21kworker/1:209:24:031
121750380irq/30-eth0_g0_1219-21kworker/1:209:08:191
121650380irq/29-eth0_g0_2563799cyclictest11:07:240
121650380irq/29-eth0_g0_1964-21runrttasks11:07:081
121380ksoftirqd/1121650irq/29-eth0_g0_12:24:471
121380ksoftirqd/1121650irq/29-eth0_g0_11:38:541
121380ksoftirqd/1121650irq/29-eth0_g0_11:24:431
121380ksoftirqd/1121650irq/29-eth0_g0_08:59:521
121380ksoftirqd/1121650irq/29-eth0_g0_08:50:021
121380ksoftirqd/1121650irq/29-eth0_g0_07:26:291
2563799375cyclictest1964-21runrttasks07:19:380
2563799373cyclictest129672sleep008:27:100
2563799373cyclictest0-21swapper/009:02:160
2563799371cyclictest7119-21load08:02:160
2563799371cyclictest5103-21/usr/sbin/munin10:07:140
2563799371cyclictest25980-21latency07:07:110
121750370irq/30-eth0_g0_1219-21kworker/1:212:11:201
121750370irq/30-eth0_g0_1219-21kworker/1:211:58:201
121750370irq/30-eth0_g0_1219-21kworker/1:210:39:391
121750370irq/30-eth0_g0_1219-21kworker/1:209:46:241
121370ksoftirqd/1121650irq/29-eth0_g0_12:14:171
121370ksoftirqd/1121650irq/29-eth0_g0_09:57:281
2563899362cyclictest27366-21ntp_states07:12:151
121750360irq/30-eth0_g0_29362-21latency_hist07:21:581
121750360irq/30-eth0_g0_1219-21kworker/1:210:35:131
121750360irq/30-eth0_g0_1219-21kworker/1:209:48:071
2563899352cyclictest1964-21runrttasks07:50:141
2563899351cyclictest4760-21grep07:52:151
121750350irq/30-eth0_g0_1964-21runrttasks08:53:281
2563899342cyclictest1964-21runrttasks08:36:001
121750340irq/30-eth0_g0_32009-21taskset07:32:101
121750340irq/30-eth0_g0_1964-21runrttasks08:24:361
121750340irq/30-eth0_g0_0-21swapper/108:00:081
121750320irq/30-eth0_g0_1964-21runrttasks08:39:461
121750310irq/30-eth0_g0_0-21swapper/107:07:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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