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2026-08-19 - 12:55

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 Wed Aug 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211170ksoftirqd/1121750irq/30-eth0_g0_22:11:491
1211030ksoftirqd/1121750irq/30-eth0_g0_21:49:140
1211000ksoftirqd/1121750irq/30-eth0_g0_22:50:320
121690ksoftirqd/1121750irq/30-eth0_g0_19:01:441
192022580sleep1121650irq/29-eth0_g0_23:57:301
121750570irq/30-eth0_g0_1201299cyclictest23:34:090
121550ksoftirqd/1121650irq/29-eth0_g0_23:26:411
65162540chrt121750irq/30-eth0_g0_23:06:460
65162540chrt121750irq/30-eth0_g0_23:06:460
146022530sleep1121750irq/30-eth0_g0_23:41:011
121530ksoftirqd/1121650irq/29-eth0_g0_21:25:130
322532520sleep1121750irq/30-eth0_g0_20:26:491
55012510sleep0121750irq/30-eth0_g0_20:51:420
121650510irq/29-eth0_g0_121ksoftirqd/123:51:430
121650510irq/29-eth0_g0_121ksoftirqd/123:51:430
1201299513cyclictest1964-21runrttasks20:41:440
121510ksoftirqd/1121750irq/30-eth0_g0_23:47:381
121650500irq/29-eth0_g0_1201299cyclictest20:36:490
121500ksoftirqd/1121650irq/29-eth0_g0_19:36:441
121500ksoftirqd/1121650irq/29-eth0_g0_19:36:441
121750490irq/30-eth0_g0_1201299cyclictest00:26:060
1201299492cyclictest0-21swapper/019:06:500
121750480irq/30-eth0_g0_1201299cyclictest23:13:280
121750480irq/30-eth0_g0_1201299cyclictest21:41:000
121750480irq/30-eth0_g0_1201299cyclictest21:41:000
121750480irq/30-eth0_g0_1201299cyclictest19:36:510
121750480irq/30-eth0_g0_1201299cyclictest19:36:510
121650480irq/29-eth0_g0_1201299cyclictest23:48:400
121650480irq/29-eth0_g0_1201299cyclictest23:42:580
121480ksoftirqd/1121750irq/30-eth0_g0_20:11:510
121480ksoftirqd/1121650irq/29-eth0_g0_00:07:220
121750470irq/30-eth0_g0_1201299cyclictest22:06:420
121750470irq/30-eth0_g0_1201299cyclictest21:55:350
121750470irq/30-eth0_g0_1201299cyclictest21:29:220
121750470irq/30-eth0_g0_1201299cyclictest00:00:490
121750460irq/30-eth0_g0_1201299cyclictest23:41:270
121750460irq/30-eth0_g0_1201299cyclictest19:26:420
121750460irq/30-eth0_g0_1201299cyclictest00:01:470
121650460irq/29-eth0_g0_1201299cyclictest23:26:430
121650460irq/29-eth0_g0_1201299cyclictest22:12:320
12012994620cyclictest7892-21/usr/sbin/munin21:01:500
121460ksoftirqd/1121750irq/30-eth0_g0_22:57:181
121460ksoftirqd/1121750irq/30-eth0_g0_00:36:181
121460ksoftirqd/1121650irq/29-eth0_g0_23:03:261
121460ksoftirqd/1121650irq/29-eth0_g0_22:27:091
121460ksoftirqd/1121650irq/29-eth0_g0_21:00:231
121460ksoftirqd/11201299cyclictest20:06:290
307952450sleep1121750irq/30-eth0_g0_22:32:501
121750450irq/30-eth0_g0_22141-21taskset21:57:061
121750450irq/30-eth0_g0_1201299cyclictest22:41:440
121750450irq/30-eth0_g0_1201299cyclictest21:33:550
121650450irq/29-eth0_g0_1201299cyclictest22:32:140
121650450irq/29-eth0_g0_1201299cyclictest00:35:590
1201299453cyclictest23371-21/usr/sbin/munin19:51:450
121450ksoftirqd/1121750irq/30-eth0_g0_00:05:231
121450ksoftirqd/1121650irq/29-eth0_g0_21:07:260
121450ksoftirqd/1121650irq/29-eth0_g0_19:35:551
121450ksoftirqd/11201299cyclictest00:11:520
121750440irq/30-eth0_g0_1201299cyclictest21:16:560
121750440irq/30-eth0_g0_1201299cyclictest20:31:530
121650440irq/29-eth0_g0_1201299cyclictest22:17:410
121440ksoftirqd/1121650irq/29-eth0_g0_22:45:261
121750430irq/30-eth0_g0_3511-21grep20:41:481
121750430irq/30-eth0_g0_1219-21kworker/1:222:37:001
121750430irq/30-eth0_g0_1219-21kworker/1:222:02:011
121750430irq/30-eth0_g0_1201299cyclictest21:12:450
121650430irq/29-eth0_g0_31ksoftirqd/022:29:560
121650430irq/29-eth0_g0_1201299cyclictest22:57:230
121650430irq/29-eth0_g0_1201299cyclictest22:51:530
1201299432cyclictest24360-21/usr/sbin/munin19:56:470
121430ksoftirqd/1121650irq/29-eth0_g0_21:32:451
121430ksoftirqd/11201299cyclictest21:44:160
121650420irq/29-eth0_g0_11466-21timerandwakeup19:01:480
121420ksoftirqd/1121650irq/29-eth0_g0_21:53:311
121420ksoftirqd/11201299cyclictest22:36:300
121420ksoftirqd/11201299cyclictest20:49:170
121420ksoftirqd/11201299cyclictest00:17:500
121750410irq/30-eth0_g0_1219-21kworker/1:223:32:071
121750410irq/30-eth0_g0_1201299cyclictest22:00:310
121650410irq/29-eth0_g0_31ksoftirqd/022:22:500
121410ksoftirqd/1121650irq/29-eth0_g0_22:08:441
121410ksoftirqd/11201299cyclictest23:04:260
121410ksoftirqd/11201299cyclictest19:17:230
121750400irq/30-eth0_g0_1219-21kworker/1:223:23:341
121750400irq/30-eth0_g0_1219-21kworker/1:223:13:091
121650400irq/29-eth0_g0_31ksoftirqd/023:18:120
121650400irq/29-eth0_g0_31ksoftirqd/000:29:070
121650400irq/29-eth0_g0_1201299cyclictest22:01:500
121400ksoftirqd/1121650irq/29-eth0_g0_21:10:451
121400ksoftirqd/1121650irq/29-eth0_g0_20:56:430
121400ksoftirqd/11201299cyclictest20:29:110
121750390irq/30-eth0_g0_1219-21kworker/1:221:21:131
1201399399cyclictest121750irq/30-eth0_g0_00:13:091
1201399391cyclictest1964-21runrttasks23:53:361
1201399391cyclictest1964-21runrttasks23:53:361
121390ksoftirqd/1121650irq/29-eth0_g0_20:16:511
121390ksoftirqd/1121650irq/29-eth0_g0_19:42:251
121390ksoftirqd/1121650irq/29-eth0_g0_19:26:461
121750380irq/30-eth0_g0_1219-21kworker/1:222:24:181
121750380irq/30-eth0_g0_1219-21kworker/1:221:47:171
121650380irq/29-eth0_g0_130362sleep121:21:441
1201399389cyclictest0-21swapper/122:19:121
121380ksoftirqd/1121750irq/30-eth0_g0_23:07:001
121380ksoftirqd/1121750irq/30-eth0_g0_23:07:001
121380ksoftirqd/1121750irq/30-eth0_g0_21:15:121
121380ksoftirqd/1121750irq/30-eth0_g0_00:17:211
121380ksoftirqd/1121650irq/29-eth0_g0_20:16:221
121750370irq/30-eth0_g0_2080-21ls20:36:461
121650370irq/29-eth0_g0_1201299cyclictest23:25:580
121650370irq/29-eth0_g0_1201299cyclictest20:06:520
1201399371cyclictest316912sleep120:26:301
1201399371cyclictest26146-21/usr/sbin/munin00:26:451
121370ksoftirqd/1121750irq/30-eth0_g0_00:07:491
121370ksoftirqd/1121650irq/29-eth0_g0_23:46:301
121370ksoftirqd/1121650irq/29-eth0_g0_19:56:451
121750360irq/30-eth0_g0_4612-21ntp_states20:46:481
121750360irq/30-eth0_g0_1219-21kworker/1:223:19:031
121750360irq/30-eth0_g0_1219-21kworker/1:200:25:121
121650360irq/29-eth0_g0_90522sleep121:06:291
121650360irq/29-eth0_g0_6106-21unixbench_singl20:51:521
1201399361cyclictest17036-21sendmail_mailtr21:36:491
1201399361cyclictest17036-21sendmail_mailtr21:36:491
121650350irq/29-eth0_g0_144342sleep119:16:111
121650350irq/29-eth0_g0_144342sleep119:16:111
1201399351cyclictest3066-21timerandwakeup22:51:501
1201399351cyclictest27008-21if_err_eth020:06:441
1201399351cyclictest178762sleep121:41:441
1201399351cyclictest15219-21unixbench_multi19:16:521
1201399351cyclictest14712-21grep21:26:521
121350ksoftirqd/1121650irq/29-eth0_g0_20:31:431
121650340irq/29-eth0_g0_9027-21diskmemload22:46:511
121650340irq/29-eth0_g0_22291-21/usr/sbin/munin19:46:471
121650340irq/29-eth0_g0_16046-21wc19:21:421
1201399342cyclictest23292-21df_inode19:51:441
1201399341cyclictest26733-21sort20:06:291
1201399341cyclictest0-21swapper/119:11:191
121750330irq/30-eth0_g0_1201299cyclictest19:31:420
121650330irq/29-eth0_g0_1964-21runrttasks19:50:260
121330ksoftirqd/1121750irq/30-eth0_g0_19:42:380
121750320irq/30-eth0_g0_1964-21runrttasks19:21:490
121750310irq/30-eth0_g0_1964-21runrttasks20:21:360
121650310irq/29-eth0_g0_1964-21runrttasks20:16:500
121310ksoftirqd/1121750irq/30-eth0_g0_19:13:090
121310ksoftirqd/1121750irq/30-eth0_g0_19:13:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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