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2026-06-11 - 21:14

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 Thu Jun 11, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211030ksoftirqd/1121750irq/30-eth0_g0_07:56:091
121790ksoftirqd/1221622sleep010:33:180
281972780sleep0121750irq/30-eth0_g0_10:57:060
173082730sleep1121750irq/30-eth0_g0_12:24:321
121730ksoftirqd/1121750irq/30-eth0_g0_07:10:321
121610ksoftirqd/1121750irq/30-eth0_g0_07:04:161
121550ksoftirqd/1121750irq/30-eth0_g0_08:09:270
121540ksoftirqd/1121750irq/30-eth0_g0_10:30:251
121510ksoftirqd/1121750irq/30-eth0_g0_12:09:591
121510ksoftirqd/1121750irq/30-eth0_g0_10:44:281
319292490sleep0121750irq/30-eth0_g0_11:12:410
61292480sleep1121650irq/29-eth0_g0_09:27:181
121480ksoftirqd/1121750irq/30-eth0_g0_12:33:081
121480ksoftirqd/1121750irq/30-eth0_g0_12:16:471
121480ksoftirqd/1121750irq/30-eth0_g0_09:29:340
121470ksoftirqd/1121750irq/30-eth0_g0_11:49:141
121460ksoftirqd/1121750irq/30-eth0_g0_10:52:281
121460ksoftirqd/1121650irq/29-eth0_g0_09:43:141
121460ksoftirqd/1121650irq/29-eth0_g0_07:41:491
121650450irq/29-eth0_g0_3878-21unixbench_singl07:04:360
120892450sleep0121650irq/29-eth0_g0_07:39:290
121450ksoftirqd/1121650irq/29-eth0_g0_08:15:531
121650440irq/29-eth0_g0_1964-21runrttasks07:11:490
121650440irq/29-eth0_g0_17129-21cat12:24:270
96722430sleep0121750irq/30-eth0_g0_09:40:400
36662430sleep1121750irq/30-eth0_g0_09:17:151
121650430irq/29-eth0_g0_31ksoftirqd/010:17:340
121430ksoftirqd/1121750irq/30-eth0_g0_11:07:040
121430ksoftirqd/1121650irq/29-eth0_g0_09:49:361
434599421cyclictest370-21unixbench_singl11:14:361
196592420sleep0121650irq/29-eth0_g0_10:22:420
131252420sleep0121650irq/29-eth0_g0_12:08:590
121750420irq/30-eth0_g0_1219-21kworker/1:212:39:111
121650420irq/29-eth0_g0_31ksoftirqd/012:29:180
121650420irq/29-eth0_g0_13-21kworker/0:112:13:140
121750410irq/30-eth0_g0_31ksoftirqd/010:04:120
121750410irq/30-eth0_g0_1219-21kworker/1:211:56:421
121750410irq/30-eth0_g0_1219-21kworker/1:209:46:001
121750410irq/30-eth0_g0_1219-21kworker/1:209:34:191
121750410irq/30-eth0_g0_1219-21kworker/1:209:34:191
121650410irq/29-eth0_g0_17241-21sendmail_mailqu07:59:350
121650410irq/29-eth0_g0_13-21kworker/0:112:16:010
121650410irq/29-eth0_g0_13-21kworker/0:111:20:350
121650410irq/29-eth0_g0_13-21kworker/0:110:25:350
121650410irq/29-eth0_g0_13-21kworker/0:110:25:350
121650410irq/29-eth0_g0_13-21kworker/0:109:45:010
121650410irq/29-eth0_g0_13-21kworker/0:109:16:310
121410ksoftirqd/1121750irq/30-eth0_g0_11:16:140
434599401cyclictest15618-21unixbench_multi10:04:351
121750400irq/30-eth0_g0_1219-21kworker/1:211:53:241
121750400irq/30-eth0_g0_1219-21kworker/1:211:53:241
121750400irq/30-eth0_g0_1219-21kworker/1:210:25:181
121750400irq/30-eth0_g0_1219-21kworker/1:210:25:181
121750400irq/30-eth0_g0_1219-21kworker/1:209:29:441
121650400irq/29-eth0_g0_13-21kworker/0:111:58:140
121650400irq/29-eth0_g0_13-21kworker/0:111:38:130
121650400irq/29-eth0_g0_13-21kworker/0:110:49:260
121400ksoftirqd/1121650irq/29-eth0_g0_11:06:051
121400ksoftirqd/1121650irq/29-eth0_g0_09:58:061
121400ksoftirqd/1121650irq/29-eth0_g0_08:35:331
121400ksoftirqd/1121650irq/29-eth0_g0_07:23:311
434599396cyclictest195352sleep108:09:311
434599391cyclictest28135-21taskset08:44:301
434599391cyclictest227412sleep110:34:331
121750390irq/30-eth0_g0_121ksoftirqd/111:20:411
121750390irq/30-eth0_g0_121ksoftirqd/111:02:331
121750390irq/30-eth0_g0_121ksoftirqd/111:02:331
121650390irq/29-eth0_g0_4405-21processes09:19:330
121650390irq/29-eth0_g0_31ksoftirqd/009:10:150
121650390irq/29-eth0_g0_31ksoftirqd/008:44:150
121650390irq/29-eth0_g0_24848-21df10:44:250
121650390irq/29-eth0_g0_15482-21/usr/sbin/munin07:54:320
121650390irq/29-eth0_g0_14326-21sed07:49:270
121650390irq/29-eth0_g0_13-21kworker/0:112:37:430
121650390irq/29-eth0_g0_13-21kworker/0:112:03:000
121650390irq/29-eth0_g0_13-21kworker/0:111:52:250
121650390irq/29-eth0_g0_13-21kworker/0:111:52:250
121650390irq/29-eth0_g0_13-21kworker/0:111:45:070
121650390irq/29-eth0_g0_13-21kworker/0:110:59:550
121650390irq/29-eth0_g0_13-21kworker/0:110:59:550
121650390irq/29-eth0_g0_13-21kworker/0:110:06:170
121650390irq/29-eth0_g0_13-21kworker/0:109:54:290
121650390irq/29-eth0_g0_13-21kworker/0:109:51:480
121650390irq/29-eth0_g0_13-21kworker/0:109:38:470
121650390irq/29-eth0_g0_13-21kworker/0:109:38:470
121390ksoftirqd/1121650irq/29-eth0_g0_10:39:221
121390ksoftirqd/1121650irq/29-eth0_g0_09:04:061
434599381cyclictest4060-21grep11:29:351
434599381cyclictest16832-21unixbench_multi10:09:361
434599381cyclictest1365-21diskmemload12:08:581
121750380irq/30-eth0_g0_8492-21chrt07:24:291
121750380irq/30-eth0_g0_1219-21kworker/1:211:25:431
121750380irq/30-eth0_g0_1219-21kworker/1:210:20:271
121750380irq/30-eth0_g0_1219-21kworker/1:209:21:401
121750380irq/30-eth0_g0_1219-21kworker/1:209:12:061
121750380irq/30-eth0_g0_121ksoftirqd/111:39:241
121650380irq/29-eth0_g0_7585-21unixbench_singl07:19:350
121650380irq/29-eth0_g0_3427-21cpu11:29:250
121650380irq/29-eth0_g0_32019-21timerandwakeup08:59:350
121650380irq/29-eth0_g0_29360-21ntpdc08:49:310
121650380irq/29-eth0_g0_1964-21runrttasks10:09:570
121650380irq/29-eth0_g0_1964-21runrttasks09:08:500
121650380irq/29-eth0_g0_16131-21/usr/sbin/munin12:19:330
121650380irq/29-eth0_g0_13-21kworker/0:111:28:000
121650380irq/29-eth0_g0_13-21kworker/0:110:40:230
121650380irq/29-eth0_g0_13-21kworker/0:109:24:420
121380ksoftirqd/1121650irq/29-eth0_g0_12:01:451
121380ksoftirqd/1121650irq/29-eth0_g0_08:29:141
121380ksoftirqd/1121650irq/29-eth0_g0_08:29:141
434599371cyclictest30668-21taskset08:54:321
434599371cyclictest24648-21cat08:29:351
434599371cyclictest144042sleep109:59:371
121750370irq/30-eth0_g0_1219-21kworker/1:210:58:101
121750370irq/30-eth0_g0_1219-21kworker/1:209:09:141
121650370irq/29-eth0_g0_24758-21grep08:29:360
121650370irq/29-eth0_g0_13-21kworker/0:111:42:410
121650370irq/29-eth0_g0_13-21kworker/0:110:34:150
121650370irq/29-eth0_g0_121ksoftirqd/112:19:421
434599361cyclictest48262sleep111:34:271
434599361cyclictest29672-21unixbench_singl08:49:371
121750360irq/30-eth0_g0_0-21swapper/110:14:291
121650360irq/29-eth0_g0_6828-21latency_hist07:19:150
121650360irq/29-eth0_g0_317672sleep111:10:491
121650360irq/29-eth0_g0_1964-21runrttasks07:29:540
121360ksoftirqd/1121650irq/29-eth0_g0_08:39:351
434599352cyclictest13664-21unixbench_multi07:44:361
434599351cyclictest17935-21cpu08:04:241
121650350irq/29-eth0_g0_28054-21missed_timers08:44:280
121650350irq/29-eth0_g0_1964-21runrttasks08:21:430
121650350irq/29-eth0_g0_13359-21seq07:44:300
434599341cyclictest0-21swapper/108:20:511
434599341cyclictest0-21swapper/107:15:321
121650340irq/29-eth0_g0_30611-21ntp_states08:54:310
121650340irq/29-eth0_g0_20680-21taskset08:14:290
121650340irq/29-eth0_g0_1964-21runrttasks08:28:550
121650340irq/29-eth0_g0_1964-21runrttasks08:28:550
121650340irq/29-eth0_g0_10840-21wc07:34:280
121340ksoftirqd/1121650irq/29-eth0_g0_07:49:311
434599331cyclictest109972sleep107:34:331
121650330irq/29-eth0_g0_25847-21mailstats08:34:340
121650330irq/29-eth0_g0_18575-21tail08:04:350
121330ksoftirqd/1121650irq/29-eth0_g0_07:29:281
121750320irq/30-eth0_g0_17851-21latency_hist08:04:141
121650310irq/29-eth0_g0_1964-21runrttasks07:25:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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