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2026-04-06 - 11:52

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 Apr 06, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23512900sleep1121650irq/29-eth0_g0_00:32:341
121710ksoftirqd/1121750irq/30-eth0_g0_00:13:281
121640ksoftirqd/1121750irq/30-eth0_g0_22:32:131
52952550sleep0121750irq/30-eth0_g0_22:32:130
121540ksoftirqd/1121750irq/30-eth0_g0_21:45:331
121500ksoftirqd/1121750irq/30-eth0_g0_21:50:121
232812490sleep1121650irq/29-eth0_g0_21:34:411
278742480sleep0121750irq/30-eth0_g0_21:51:570
121750480irq/30-eth0_g0_2001999cyclictest23:47:521
121480ksoftirqd/1121750irq/30-eth0_g0_00:18:120
243112470sleep0121650irq/29-eth0_g0_21:38:180
128422460sleep0121650irq/29-eth0_g0_23:04:250
121460ksoftirqd/1121750irq/30-eth0_g0_23:49:490
121460ksoftirqd/1121750irq/30-eth0_g0_21:29:351
121460ksoftirqd/1121650irq/29-eth0_g0_23:09:531
121460ksoftirqd/1121650irq/29-eth0_g0_22:08:100
121750450irq/30-eth0_g0_9555-21runrttasks22:49:461
121750450irq/30-eth0_g0_121ksoftirqd/121:16:071
121750450irq/30-eth0_g0_121ksoftirqd/121:16:071
121450ksoftirqd/12001999cyclictest19:19:461
16422440sleep0121750irq/30-eth0_g0_22:17:450
121750440irq/30-eth0_g0_121ksoftirqd/122:59:181
121440ksoftirqd/1121650irq/29-eth0_g0_23:54:481
322902430sleep0121650irq/29-eth0_g0_19:59:320
121750430irq/30-eth0_g0_121ksoftirqd/121:56:091
121750430irq/30-eth0_g0_121ksoftirqd/121:25:291
121430ksoftirqd/12001999cyclictest19:29:521
121750420irq/30-eth0_g0_1219-21kworker/1:223:01:181
121750420irq/30-eth0_g0_1219-21kworker/1:200:34:481
121750420irq/30-eth0_g0_121ksoftirqd/121:09:541
121750420irq/30-eth0_g0_0-21swapper/122:12:351
121750420irq/30-eth0_g0_0-21swapper/122:12:351
121420ksoftirqd/1121750irq/30-eth0_g0_22:49:590
121420ksoftirqd/1121650irq/29-eth0_g0_23:44:331
2001999411cyclictest14831-21df_abs20:59:451
121750410irq/30-eth0_g0_1219-21kworker/1:223:18:091
121750410irq/30-eth0_g0_1219-21kworker/1:200:04:461
121750410irq/30-eth0_g0_121ksoftirqd/123:30:511
121750410irq/30-eth0_g0_0-21swapper/122:24:491
121650410irq/29-eth0_g0_19004-21df_abs19:04:450
121650410irq/29-eth0_g0_13-21kworker/0:100:29:510
121410ksoftirqd/12001999cyclictest19:54:531
121410ksoftirqd/1121750irq/30-eth0_g0_23:29:110
121410ksoftirqd/1121750irq/30-eth0_g0_22:43:230
121750400irq/30-eth0_g0_12946-21/usr/sbin/munin23:04:551
121750400irq/30-eth0_g0_12946-21/usr/sbin/munin23:04:551
121750400irq/30-eth0_g0_1219-21kworker/1:200:00:591
121750400irq/30-eth0_g0_121ksoftirqd/122:34:471
121650400irq/29-eth0_g0_2001899cyclictest22:45:380
121650400irq/29-eth0_g0_13-21kworker/0:121:24:540
121650400irq/29-eth0_g0_13-21kworker/0:100:20:110
121400ksoftirqd/12001999cyclictest23:50:331
121750390irq/30-eth0_g0_30368-21latency00:14:461
121750390irq/30-eth0_g0_21301-21taskset23:37:511
121750390irq/30-eth0_g0_1219-21kworker/1:200:23:281
121750390irq/30-eth0_g0_0-21swapper/122:06:581
121650390irq/29-eth0_g0_25579-21chrt21:43:480
121650390irq/29-eth0_g0_13-21kworker/0:121:29:500
121650390irq/29-eth0_g0_13-21kworker/0:121:15:400
121650390irq/29-eth0_g0_13-21kworker/0:121:15:400
121650390irq/29-eth0_g0_13-21kworker/0:100:38:510
121390ksoftirqd/12001999cyclictest20:19:471
121390ksoftirqd/119696-21runrttasks19:05:541
121390ksoftirqd/1121650irq/29-eth0_g0_22:44:231
121390ksoftirqd/1121650irq/29-eth0_g0_00:24:441
121750380irq/30-eth0_g0_20689-21timerandwakeup19:09:521
121750380irq/30-eth0_g0_0-21swapper/123:26:491
121650380irq/29-eth0_g0_31ksoftirqd/000:29:030
121650380irq/29-eth0_g0_16326-21taskset23:17:060
121650380irq/29-eth0_g0_16288-21/usr/sbin/munin21:04:480
121650380irq/29-eth0_g0_13-21kworker/0:123:31:290
121650380irq/29-eth0_g0_13-21kworker/0:122:26:510
121650380irq/29-eth0_g0_13-21kworker/0:121:47:540
121650380irq/29-eth0_g0_13-21kworker/0:121:19:580
121650380irq/29-eth0_g0_13-21kworker/0:121:13:370
121650380irq/29-eth0_g0_0-21swapper/022:23:100
121380ksoftirqd/1121650irq/29-eth0_g0_22:45:561
121380ksoftirqd/1121650irq/29-eth0_g0_19:49:491
20019993722cyclictest4787-21latency_hist20:19:331
2001999371cyclictest3042-21grep20:09:541
121750370irq/30-eth0_g0_24511-21cpu21:39:431
121750370irq/30-eth0_g0_1219-21kworker/1:222:14:461
121650370irq/29-eth0_g0_31ksoftirqd/020:59:540
121650370irq/29-eth0_g0_23681-21seq23:47:000
121650370irq/29-eth0_g0_13-21kworker/0:123:43:010
121650370irq/29-eth0_g0_13-21kworker/0:123:20:210
121650370irq/29-eth0_g0_13-21kworker/0:122:55:150
121650370irq/29-eth0_g0_13-21kworker/0:122:35:110
121650370irq/29-eth0_g0_13-21kworker/0:121:54:450
121650370irq/29-eth0_g0_13-21kworker/0:100:10:190
121370ksoftirqd/1121650irq/29-eth0_g0_22:21:401
121370ksoftirqd/1121650irq/29-eth0_g0_20:09:331
2001999362cyclictest24028-21irqstats19:24:471
2001999360cyclictest0-21swapper/120:30:471
121750360irq/30-eth0_g0_1219-21kworker/1:221:22:401
121750360irq/30-eth0_g0_10158-21ntpdc20:39:481
121650360irq/29-eth0_g0_30082-21sed21:59:570
121650360irq/29-eth0_g0_2001899cyclictest20:24:470
121650360irq/29-eth0_g0_13-21kworker/0:123:57:570
121650360irq/29-eth0_g0_13-21kworker/0:100:04:450
20019993531cyclictest28803-21df_abs19:44:441
2001999351cyclictest565-21unixbench_multi19:59:531
2001999351cyclictest16752-21seq23:19:431
2001999351cyclictest13460-21runrttasks20:54:421
121750350irq/30-eth0_g0_27843-21seq19:39:471
121750350irq/30-eth0_g0_27843-21seq19:39:471
121750350irq/30-eth0_g0_1219-21kworker/1:222:01:511
121650350irq/29-eth0_g0_24407-21sshd19:24:540
121650350irq/29-eth0_g0_13-21kworker/0:123:10:440
121650350irq/29-eth0_g0_13-21kworker/0:122:11:580
121650350irq/29-eth0_g0_13-21kworker/0:122:11:580
2001999342cyclictest13370-21/usr/sbin/munin20:54:321
2001999341cyclictest17061-21cat21:09:331
121750340irq/30-eth0_g0_1875-21runrttasks20:40:230
121650340irq/29-eth0_g0_30483-21/usr/sbin/munin19:49:520
121650340irq/29-eth0_g0_28050-21timerandwakeup19:39:520
121650340irq/29-eth0_g0_28050-21timerandwakeup19:39:520
121650340irq/29-eth0_g0_20817-21unixbench_singl19:09:530
121650340irq/29-eth0_g0_20779-21ps23:34:510
121650340irq/29-eth0_g0_13-21kworker/0:100:03:040
121650340irq/29-eth0_g0_12915-21unixbench_singl20:49:540
121650340irq/29-eth0_g0_0-21swapper/020:19:520
121650340irq/29-eth0_g0_0-21swapper/019:29:520
2001999332cyclictest21573-21irqstats19:14:471
2001999331cyclictest8936-21ntp_kernel_pll_20:34:511
2001999331cyclictest6158-21chrt20:24:441
2001999331cyclictest26373-21df_abs19:34:441
2001999331cyclictest26373-21df_abs19:34:441
121650330irq/29-eth0_g0_9235-21sed20:34:560
121650330irq/29-eth0_g0_4326-21unixbench_singl20:14:550
121650330irq/29-eth0_g0_3011-21timerandwakeup20:09:540
121650330irq/29-eth0_g0_26374-21chrt19:34:440
121650330irq/29-eth0_g0_26374-21chrt19:34:440
121650330irq/29-eth0_g0_22119-21runrttasks19:15:260
121650330irq/29-eth0_g0_13481-21sendmail_mailqu23:04:530
121650330irq/29-eth0_g0_13481-21sendmail_mailqu23:04:530
121650330irq/29-eth0_g0_0-21swapper/020:07:570
121650330irq/29-eth0_g0_0-21swapper/019:19:460
121330ksoftirqd/111969-21taskset20:47:331
121650320irq/29-eth0_g0_14030-21/usr/sbin/munin20:54:520
121650320irq/29-eth0_g0_11005-21/usr/sbin/munin20:44:410
121650320irq/29-eth0_g0_0-21swapper/020:34:330
121650320irq/29-eth0_g0_0-21swapper/019:44:460
121650310irq/29-eth0_g0_0-21swapper/019:59:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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