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2026-08-18 - 23:51

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 Tue Aug 18, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121870ksoftirqd/1121750irq/30-eth0_g0_11:46:460
121780ksoftirqd/1121750irq/30-eth0_g0_07:21:511
327442750chrt121650irq/29-eth0_g0_10:08:101
121750ksoftirqd/1190572sleep009:11:550
240042640sleep1121750irq/30-eth0_g0_09:31:531
280342590sleep0121650irq/29-eth0_g0_09:50:220
280342590sleep0121650irq/29-eth0_g0_09:50:220
140852560sleep1121750irq/30-eth0_g0_11:06:301
121490ksoftirqd/1121750irq/30-eth0_g0_10:59:551
121490ksoftirqd/1121750irq/30-eth0_g0_10:28:451
121650480irq/29-eth0_g0_31ksoftirqd/012:31:430
121480ksoftirqd/1121750irq/30-eth0_g0_09:05:311
287152470sleep1121750irq/30-eth0_g0_12:05:381
121470ksoftirqd/1121750irq/30-eth0_g0_11:16:121
121460ksoftirqd/1121750irq/30-eth0_g0_10:36:201
121460ksoftirqd/1121650irq/29-eth0_g0_11:32:021
121460ksoftirqd/1121650irq/29-eth0_g0_07:59:191
302252450sleep0121650irq/29-eth0_g0_09:57:220
121750450irq/30-eth0_g0_1219-21kworker/1:212:17:141
121750450irq/30-eth0_g0_121ksoftirqd/110:04:211
121650450irq/29-eth0_g0_13-21kworker/0:111:31:470
121450ksoftirqd/1121750irq/30-eth0_g0_10:26:440
121650440irq/29-eth0_g0_31ksoftirqd/011:43:530
121440ksoftirqd/1121750irq/30-eth0_g0_08:01:521
121650430irq/29-eth0_g0_30776-21unixbench_singl12:11:520
121650430irq/29-eth0_g0_2012499cyclictest10:47:430
121430ksoftirqd/1121650irq/29-eth0_g0_10:51:361
121430ksoftirqd/1121650irq/29-eth0_g0_09:50:551
121430ksoftirqd/1121650irq/29-eth0_g0_09:50:551
121750420irq/30-eth0_g0_1219-21kworker/1:211:48:491
121420ksoftirqd/1121650irq/29-eth0_g0_12:14:081
121750410irq/30-eth0_g0_1219-21kworker/1:212:01:111
121750410irq/30-eth0_g0_1219-21kworker/1:211:37:301
121750410irq/30-eth0_g0_1219-21kworker/1:209:53:181
121650410irq/29-eth0_g0_31ksoftirqd/009:11:220
121650410irq/29-eth0_g0_31ksoftirqd/007:36:310
121650410irq/29-eth0_g0_1964-21runrttasks11:12:260
121650410irq/29-eth0_g0_19611-21unixbench_multi07:01:500
121650410irq/29-eth0_g0_13-21kworker/0:112:24:200
121650410irq/29-eth0_g0_13-21kworker/0:112:07:210
121650410irq/29-eth0_g0_13-21kworker/0:112:01:260
121650410irq/29-eth0_g0_13-21kworker/0:110:43:380
121650410irq/29-eth0_g0_121ksoftirqd/109:53:100
121650410irq/29-eth0_g0_121ksoftirqd/109:21:330
121410ksoftirqd/1121650irq/29-eth0_g0_10:54:400
20125994035cyclictest15341-21latency_hist11:11:311
2012599401cyclictest23294-21unixbench_multi07:16:511
121750400irq/30-eth0_g0_121ksoftirqd/110:15:301
121650400irq/29-eth0_g0_19887-21irqstats09:16:450
121650400irq/29-eth0_g0_13-21kworker/0:112:27:510
121650400irq/29-eth0_g0_13-21kworker/0:112:18:460
121650400irq/29-eth0_g0_13-21kworker/0:111:37:110
121650400irq/29-eth0_g0_13-21kworker/0:110:17:130
121650400irq/29-eth0_g0_13-21kworker/0:110:12:350
121650400irq/29-eth0_g0_13-21kworker/0:109:42:030
121400ksoftirqd/119192-21/usr/sbin/munin07:01:431
121400ksoftirqd/1121650irq/29-eth0_g0_10:46:301
20125993934cyclictest25346-21taskset07:26:451
2012599392cyclictest27028-21head07:31:531
2012599392cyclictest1219-21kworker/1:208:31:391
2012599392cyclictest11052-21latency_hist08:41:301
121750390irq/30-eth0_g0_1219-21kworker/1:209:31:001
121750390irq/30-eth0_g0_121ksoftirqd/111:28:451
121750390irq/30-eth0_g0_121ksoftirqd/109:08:021
121650390irq/29-eth0_g0_31ksoftirqd/011:01:450
121650390irq/29-eth0_g0_2012499cyclictest10:25:130
121650390irq/29-eth0_g0_13-21kworker/0:111:55:460
121650390irq/29-eth0_g0_121ksoftirqd/109:36:451
121650390irq/29-eth0_g0_0-21swapper/012:01:470
121390ksoftirqd/1121750irq/30-eth0_g0_11:27:220
121390ksoftirqd/1121750irq/30-eth0_g0_11:26:290
121390ksoftirqd/1121750irq/30-eth0_g0_11:06:390
121390ksoftirqd/1121750irq/30-eth0_g0_10:37:090
121390ksoftirqd/1121750irq/30-eth0_g0_10:33:320
121390ksoftirqd/1121750irq/30-eth0_g0_09:34:440
121390ksoftirqd/1121750irq/30-eth0_g0_09:28:320
121390ksoftirqd/1121750irq/30-eth0_g0_08:52:240
121390ksoftirqd/1121750irq/30-eth0_g0_08:32:520
121390ksoftirqd/1121650irq/29-eth0_g0_11:19:341
121390ksoftirqd/1121650irq/29-eth0_g0_10:49:161
121390ksoftirqd/1121650irq/29-eth0_g0_10:00:171
121390ksoftirqd/1121650irq/29-eth0_g0_09:15:211
121390ksoftirqd/1121650irq/29-eth0_g0_08:07:331
121390ksoftirqd/1121650irq/29-eth0_g0_07:07:071
121750380irq/30-eth0_g0_31ksoftirqd/011:00:250
121750380irq/30-eth0_g0_1219-21kworker/1:210:36:561
121650380irq/29-eth0_g0_5233-21sort08:16:470
121650380irq/29-eth0_g0_278212sleep007:36:450
121650380irq/29-eth0_g0_278212sleep007:36:450
121650380irq/29-eth0_g0_15301-21sendmail_mailst08:56:510
121650380irq/29-eth0_g0_13-21kworker/0:110:07:210
121380ksoftirqd/1121750irq/30-eth0_g0_09:39:140
121380ksoftirqd/1121650irq/29-eth0_g0_09:44:441
121380ksoftirqd/1121650irq/29-eth0_g0_08:12:501
121380ksoftirqd/1121650irq/29-eth0_g0_07:41:311
121380ksoftirqd/1121650irq/29-eth0_g0_07:41:311
121380ksoftirqd/1121650irq/29-eth0_g0_07:14:521
2012599371cyclictest17116-21diskmemload09:16:481
2012599371cyclictest15400-21tail08:56:521
2012599371cyclictest0-21swapper/108:16:531
121750370irq/30-eth0_g0_20879-21/usr/sbin/munin09:21:441
121750370irq/30-eth0_g0_1219-21kworker/1:212:25:531
121750370irq/30-eth0_g0_1219-21kworker/1:211:42:151
121750370irq/30-eth0_g0_121ksoftirqd/112:28:031
121750370irq/30-eth0_g0_0-21swapper/112:07:141
121750370irq/30-eth0_g0_0-21swapper/111:52:241
121750370irq/30-eth0_g0_0-21swapper/110:20:271
121650370irq/29-eth0_g0_23125-21proc_pri07:16:480
121650370irq/29-eth0_g0_1964-21runrttasks07:22:180
121650370irq/29-eth0_g0_1964-21runrttasks07:09:110
121650370irq/29-eth0_g0_13-21kworker/0:111:20:380
121650370irq/29-eth0_g0_13-21kworker/0:110:01:390
2012599362cyclictest8102-21sed08:26:531
2012599362cyclictest30268-21taskset07:46:441
2012599361cyclictest6526-21cat08:21:481
2012599361cyclictest0-21swapper/108:55:521
121650360irq/29-eth0_g0_31512-21latency07:51:460
121650360irq/29-eth0_g0_2965-21proc_pri08:06:490
121360ksoftirqd/1121650irq/29-eth0_g0_08:41:531
2012599351cyclictest29480-21grep07:41:531
121750350irq/30-eth0_g0_25576-21ps07:26:500
121650350irq/29-eth0_g0_7477-21/usr/sbin/munin08:26:420
121650350irq/29-eth0_g0_6840-21grep08:21:540
121650350irq/29-eth0_g0_3456-21runrttasks12:33:261
121650350irq/29-eth0_g0_305-21ls07:56:460
121650350irq/29-eth0_g0_12937-21unixbench_multi08:46:520
121650350irq/29-eth0_g0_11391-21missed_timers08:41:470
121650350irq/29-eth0_g0_0-21swapper/009:01:490
2012599342cyclictest18554-21unixbench_singl11:21:531
2012599341cyclictest35502sleep110:21:481
121750340irq/30-eth0_g0_31885-21unixbench_multi07:51:531
121750340irq/30-eth0_g0_12430-21df_abs08:46:421
121650340irq/29-eth0_g0_30175-21df_inode07:46:420
121650340irq/29-eth0_g0_28857-21df07:41:420
121650340irq/29-eth0_g0_1899-21unixbench_multi08:01:520
121650340irq/29-eth0_g0_10502-21grep08:36:520
121650330irq/29-eth0_g0_3905-21forks08:11:420
121650330irq/29-eth0_g0_1964-21runrttasks07:14:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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