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2026-09-06 - 00:34

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 Sat Sep 05, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1078321240chrt121750irq/30-eth0_g0_07:21:110
97552850sleep0121750irq/30-eth0_g0_11:41:100
193912850sleep0121750irq/30-eth0_g0_10:10:490
121780ksoftirqd/1121750irq/30-eth0_g0_08:46:101
217932720sleep0121750irq/30-eth0_g0_10:20:480
121710ksoftirqd/1121750irq/30-eth0_g0_08:58:041
121690ksoftirqd/1121750irq/30-eth0_g0_10:36:100
227382670sleep1121750irq/30-eth0_g0_10:22:501
57032630sleep1121650irq/29-eth0_g0_09:14:331
121600ksoftirqd/1121750irq/30-eth0_g0_12:31:061
121590ksoftirqd/1121750irq/30-eth0_g0_07:31:091
121590ksoftirqd/1121650irq/29-eth0_g0_07:31:100
121580ksoftirqd/1121750irq/30-eth0_g0_08:40:591
121580ksoftirqd/1121750irq/30-eth0_g0_07:19:511
288702560sleep0121750irq/30-eth0_g0_10:47:450
27282560sleep1121650irq/29-eth0_g0_11:14:251
252422560sleep0121750irq/30-eth0_g0_10:33:250
121540ksoftirqd/1121750irq/30-eth0_g0_11:55:511
121520ksoftirqd/1121750irq/30-eth0_g0_10:27:381
121500ksoftirqd/1121750irq/30-eth0_g0_12:16:051
121650490irq/29-eth0_g0_13771-21/usr/sbin/munin07:36:010
121750460irq/30-eth0_g0_1219-21kworker/1:211:04:331
121460ksoftirqd/1121750irq/30-eth0_g0_11:46:031
121460ksoftirqd/1121650irq/29-eth0_g0_10:16:161
121750450irq/30-eth0_g0_1219-21kworker/1:210:09:471
121450ksoftirqd/1121750irq/30-eth0_g0_08:35:491
121450ksoftirqd/1121650irq/29-eth0_g0_10:47:411
121750440irq/30-eth0_g0_1219-21kworker/1:211:28:041
121750440irq/30-eth0_g0_0-21swapper/109:40:481
121650440irq/29-eth0_g0_7336-21unixbench_singl11:31:110
121650440irq/29-eth0_g0_5853-21unixbench_singl07:01:100
121440ksoftirqd/1121650irq/29-eth0_g0_12:26:271
121440ksoftirqd/1121650irq/29-eth0_g0_09:24:371
121440ksoftirqd/1121650irq/29-eth0_g0_08:11:311
162232430sleep1121750irq/30-eth0_g0_12:09:191
121750430irq/30-eth0_g0_1219-21kworker/1:211:37:331
121750430irq/30-eth0_g0_1219-21kworker/1:211:33:521
121750430irq/30-eth0_g0_1219-21kworker/1:209:26:331
121750430irq/30-eth0_g0_1219-21kworker/1:209:06:411
121650430irq/29-eth0_g0_17082-21df_abs10:01:000
121430ksoftirqd/1121750irq/30-eth0_g0_11:40:591
121750420irq/30-eth0_g0_1219-21kworker/1:211:52:081
121750420irq/30-eth0_g0_1219-21kworker/1:211:09:271
121750420irq/30-eth0_g0_1219-21kworker/1:210:11:171
121750420irq/30-eth0_g0_1219-21kworker/1:209:55:201
121650420irq/29-eth0_g0_17988-21find07:51:090
121650420irq/29-eth0_g0_16382-21latency_hist12:10:480
121650420irq/29-eth0_g0_121ksoftirqd/110:45:470
121420ksoftirqd/1121650irq/29-eth0_g0_10:33:151
121420ksoftirqd/1121650irq/29-eth0_g0_09:31:041
121420ksoftirqd/1121650irq/29-eth0_g0_09:31:041
121750410irq/30-eth0_g0_1219-21kworker/1:209:56:141
121650410irq/29-eth0_g0_142222sleep109:48:411
121650410irq/29-eth0_g0_121ksoftirqd/109:43:230
121650410irq/29-eth0_g0_10228-21unixbench_multi09:31:090
121650410irq/29-eth0_g0_10228-21unixbench_multi09:31:090
121410ksoftirqd/1121750irq/30-eth0_g0_10:41:101
121410ksoftirqd/1121750irq/30-eth0_g0_09:29:110
121410ksoftirqd/1121650irq/29-eth0_g0_08:40:491
121650400irq/29-eth0_g0_1964-21runrttasks07:20:090
121650400irq/29-eth0_g0_13-21kworker/0:112:14:060
121650400irq/29-eth0_g0_121ksoftirqd/111:26:010
121650400irq/29-eth0_g0_0-21swapper/007:06:000
121750390irq/30-eth0_g0_13-21kworker/0:112:18:270
121750390irq/30-eth0_g0_1219-21kworker/1:212:04:541
121750390irq/30-eth0_g0_1219-21kworker/1:210:37:441
121750390irq/30-eth0_g0_1219-21kworker/1:209:42:181
121750390irq/30-eth0_g0_1219-21kworker/1:209:18:291
121650390irq/29-eth0_g0_31ksoftirqd/010:54:250
121650390irq/29-eth0_g0_16158-21cat07:45:480
121650390irq/29-eth0_g0_13933-21grep09:46:150
121650390irq/29-eth0_g0_13-21kworker/0:111:19:170
121650390irq/29-eth0_g0_13-21kworker/0:110:05:530
121650390irq/29-eth0_g0_13-21kworker/0:109:57:080
121650390irq/29-eth0_g0_121ksoftirqd/110:59:480
121650390irq/29-eth0_g0_121ksoftirqd/110:59:480
121650390irq/29-eth0_g0_121ksoftirqd/110:22:500
121390ksoftirqd/1121650irq/29-eth0_g0_12:13:091
121390ksoftirqd/1121650irq/29-eth0_g0_08:22:061
121390ksoftirqd/1121650irq/29-eth0_g0_07:46:361
121390ksoftirqd/1121650irq/29-eth0_g0_07:25:181
121750380irq/30-eth0_g0_1219-21kworker/1:211:20:571
121650380irq/29-eth0_g0_4302-21df11:20:590
121650380irq/29-eth0_g0_32250-21df08:50:590
121650380irq/29-eth0_g0_31ksoftirqd/012:26:020
121650380irq/29-eth0_g0_31ksoftirqd/011:49:450
121650380irq/29-eth0_g0_1964-21runrttasks12:01:130
121650380irq/29-eth0_g0_18738-21df07:56:000
121650380irq/29-eth0_g0_14664-21entropy09:51:030
121650380irq/29-eth0_g0_13-21kworker/0:112:31:120
121650380irq/29-eth0_g0_13-21kworker/0:112:25:360
121650380irq/29-eth0_g0_121ksoftirqd/109:37:480
121380ksoftirqd/1121650irq/29-eth0_g0_08:18:351
121380ksoftirqd/1121650irq/29-eth0_g0_08:02:021
121380ksoftirqd/1121650irq/29-eth0_g0_07:01:041
121750370irq/30-eth0_g0_3169-21chrt11:16:021
121750370irq/30-eth0_g0_1219-21kworker/1:212:23:401
121750370irq/30-eth0_g0_1219-21kworker/1:210:52:001
121750370irq/30-eth0_g0_0-21swapper/110:02:111
121650370irq/29-eth0_g0_13-21kworker/0:111:52:120
121650370irq/29-eth0_g0_13-21kworker/0:111:36:330
630899361cyclictest26673-21unixbench_multi08:26:101
121750360irq/30-eth0_g0_1219-21kworker/1:210:55:591
121750360irq/30-eth0_g0_1219-21kworker/1:210:55:591
121650360irq/29-eth0_g0_3357-21diskmemload09:16:080
121650360irq/29-eth0_g0_31916-21irqstats11:01:030
121650360irq/29-eth0_g0_31ksoftirqd/011:06:350
121650360irq/29-eth0_g0_31ksoftirqd/009:12:070
121650360irq/29-eth0_g0_1964-21runrttasks08:32:210
121650360irq/29-eth0_g0_1964-21runrttasks08:15:270
121650360irq/29-eth0_g0_13360-21/usr/sbin/munin11:56:100
121650360irq/29-eth0_g0_13-21kworker/0:111:12:080
121650360irq/29-eth0_g0_13-21kworker/0:109:10:110
121360ksoftirqd/1121750irq/30-eth0_g0_09:23:200
121360ksoftirqd/1121650irq/29-eth0_g0_07:28:401
121650350irq/29-eth0_g0_8318-21unixbench_singl07:11:090
121650350irq/29-eth0_g0_31649-21unixbench_singl08:46:110
121650350irq/29-eth0_g0_30326-21timerandwakeup08:41:080
121650350irq/29-eth0_g0_25503-21sed08:21:110
121650350irq/29-eth0_g0_21572-21/usr/sbin/munin08:06:060
121650350irq/29-eth0_g0_21432-21cat08:06:031
121650350irq/29-eth0_g0_21095-21latency_hist08:05:490
121650350irq/29-eth0_g0_1964-21runrttasks08:36:520
121650350irq/29-eth0_g0_1964-21runrttasks07:47:560
121650350irq/29-eth0_g0_11387-21df_abs07:26:010
121650350irq/29-eth0_g0_0-21swapper/010:25:550
121350ksoftirqd/118483-21runrttasks07:54:411
121350ksoftirqd/1121750irq/30-eth0_g0_08:51:001
630899342cyclictest2752-21zcat09:01:081
121650340irq/29-eth0_g0_630899cyclictest07:41:051
121650340irq/29-eth0_g0_23588-21/usr/sbin/munin08:16:050
121650340irq/29-eth0_g0_1928-21sshd08:58:500
121650330irq/29-eth0_g0_2909-21head09:01:100
121650330irq/29-eth0_g0_26114-21df_abs08:26:010
121330ksoftirqd/118973-21missed_timers07:56:041
630899321cyclictest8312-21head07:11:091
121320ksoftirqd/1121650irq/29-eth0_g0_07:36:081
630899301cyclictest6772-21netstat07:06:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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