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2026-09-19 - 23:55

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 highest latencies:
System rack3slot5s.osadl.org (updated Sat Sep 19, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2362921640chrt121650irq/29-eth0_g0_12:18:111
121890ksoftirqd/1121750irq/30-eth0_g0_10:13:561
203892830sleep1121650irq/29-eth0_g0_09:52:071
121770ksoftirqd/1121750irq/30-eth0_g0_09:28:470
121700ksoftirqd/1121750irq/30-eth0_g0_12:13:190
53212580sleep1121750irq/30-eth0_g0_11:04:151
121550ksoftirqd/1121750irq/30-eth0_g0_09:06:451
121540ksoftirqd/1121750irq/30-eth0_g0_11:49:081
239952520sleep1121750irq/30-eth0_g0_10:06:171
121750510irq/30-eth0_g0_17697-21unixbench_multi09:40:361
121650490irq/29-eth0_g0_31ksoftirqd/008:10:380
121490ksoftirqd/1121750irq/30-eth0_g0_12:06:141
121490ksoftirqd/1121750irq/30-eth0_g0_09:59:391
151892470sleep0121750irq/30-eth0_g0_11:44:490
121470ksoftirqd/1121750irq/30-eth0_g0_09:49:201
3302460sleep0121650irq/29-eth0_g0_10:43:500
121460ksoftirqd/1121750irq/30-eth0_g0_12:34:041
121460ksoftirqd/1121650irq/29-eth0_g0_12:27:241
121460ksoftirqd/1121650irq/29-eth0_g0_10:27:571
121650450irq/29-eth0_g0_31ksoftirqd/011:28:590
121650450irq/29-eth0_g0_10892-21unixbench_multi07:00:370
121450ksoftirqd/1121650irq/29-eth0_g0_09:19:451
121650440irq/29-eth0_g0_0-21swapper/009:10:400
121440ksoftirqd/1121750irq/30-eth0_g0_08:32:110
121440ksoftirqd/1121650irq/29-eth0_g0_10:15:301
121750430irq/30-eth0_g0_1219-21kworker/1:209:38:171
121650430irq/29-eth0_g0_1222-21grep10:45:380
121430ksoftirqd/1121650irq/29-eth0_g0_10:33:131
163992420sleep0121650irq/29-eth0_g0_09:35:350
121650420irq/29-eth0_g0_31ksoftirqd/011:55:470
11391994236cyclictest8605-21grep11:15:381
121750410irq/30-eth0_g0_22190-21seq12:10:431
121650410irq/29-eth0_g0_20145-21sed09:50:380
121650410irq/29-eth0_g0_13-21kworker/0:112:34:270
121650410irq/29-eth0_g0_13-21kworker/0:111:12:000
121650410irq/29-eth0_g0_13-21kworker/0:111:01:270
121650410irq/29-eth0_g0_13-21kworker/0:110:27:470
121410ksoftirqd/1121750irq/30-eth0_g0_07:22:160
121410ksoftirqd/1121650irq/29-eth0_g0_11:10:381
121410ksoftirqd/1121650irq/29-eth0_g0_09:20:531
121410ksoftirqd/1121650irq/29-eth0_g0_09:10:321
121750400irq/30-eth0_g0_1219-21kworker/1:211:24:281
121750400irq/30-eth0_g0_1219-21kworker/1:210:55:371
121650400irq/29-eth0_g0_31ksoftirqd/011:35:290
121650400irq/29-eth0_g0_25783-21sed12:25:370
121650400irq/29-eth0_g0_1964-21runrttasks10:05:570
121650400irq/29-eth0_g0_1964-21runrttasks08:42:450
121650400irq/29-eth0_g0_1964-21runrttasks08:42:450
121650400irq/29-eth0_g0_13-21kworker/0:112:08:410
121650400irq/29-eth0_g0_13-21kworker/0:111:54:230
121650400irq/29-eth0_g0_13-21kworker/0:111:35:160
121650400irq/29-eth0_g0_13-21kworker/0:110:36:150
121650400irq/29-eth0_g0_13-21kworker/0:110:32:380
121400ksoftirqd/1121750irq/30-eth0_g0_11:07:490
121400ksoftirqd/1121750irq/30-eth0_g0_10:22:100
121400ksoftirqd/1121750irq/30-eth0_g0_08:55:070
121400ksoftirqd/1121750irq/30-eth0_g0_08:55:070
121400ksoftirqd/1121750irq/30-eth0_g0_08:36:090
121400ksoftirqd/1121750irq/30-eth0_g0_08:36:090
121400ksoftirqd/1121750irq/30-eth0_g0_08:23:150
121400ksoftirqd/1121750irq/30-eth0_g0_08:03:520
121400ksoftirqd/1121750irq/30-eth0_g0_07:53:260
121400ksoftirqd/1121750irq/30-eth0_g0_07:42:430
121400ksoftirqd/1121750irq/30-eth0_g0_07:35:210
121400ksoftirqd/1121750irq/30-eth0_g0_07:31:100
121400ksoftirqd/1121750irq/30-eth0_g0_07:29:260
121400ksoftirqd/1121750irq/30-eth0_g0_07:17:150
121400ksoftirqd/1121650irq/29-eth0_g0_11:05:331
121400ksoftirqd/1121650irq/29-eth0_g0_08:47:511
11391994035cyclictest18296-21unixbench_singl07:30:371
1139199401cyclictest32315-21grep10:40:351
121750390irq/30-eth0_g0_1219-21kworker/1:212:23:131
121750390irq/30-eth0_g0_1219-21kworker/1:211:26:181
121750390irq/30-eth0_g0_1219-21kworker/1:210:36:481
121750390irq/30-eth0_g0_121ksoftirqd/109:29:201
121750390irq/30-eth0_g0_121ksoftirqd/108:15:341
121750390irq/30-eth0_g0_0-21swapper/111:37:071
121650390irq/29-eth0_g0_37412sleep008:45:280
121650390irq/29-eth0_g0_13-21kworker/0:110:57:360
121650390irq/29-eth0_g0_13-21kworker/0:109:46:550
121650390irq/29-eth0_g0_13-21kworker/0:109:34:230
121650390irq/29-eth0_g0_13-21kworker/0:109:05:340
121650390irq/29-eth0_g0_1139099cyclictest10:16:030
121650390irq/29-eth0_g0_1139099cyclictest09:16:310
121390ksoftirqd/1291772sleep008:15:370
121390ksoftirqd/1121750irq/30-eth0_g0_12:22:300
121390ksoftirqd/1121750irq/30-eth0_g0_11:15:420
121390ksoftirqd/1121750irq/30-eth0_g0_10:10:530
121390ksoftirqd/1121750irq/30-eth0_g0_10:02:520
121390ksoftirqd/1121750irq/30-eth0_g0_09:03:060
121390ksoftirqd/1121750irq/30-eth0_g0_07:13:160
121390ksoftirqd/1121750irq/30-eth0_g0_07:08:500
121390ksoftirqd/1121750irq/30-eth0_g0_07:08:500
121390ksoftirqd/1121650irq/29-eth0_g0_12:01:581
121390ksoftirqd/1121650irq/29-eth0_g0_12:01:581
121390ksoftirqd/1121650irq/29-eth0_g0_09:31:361
121750380irq/30-eth0_g0_1219-21kworker/1:210:50:021
121750380irq/30-eth0_g0_121ksoftirqd/111:55:221
121650380irq/29-eth0_g0_1964-21runrttasks09:20:560
121650380irq/29-eth0_g0_1964-21runrttasks08:59:120
121650380irq/29-eth0_g0_13-21kworker/0:112:03:430
121650380irq/29-eth0_g0_13-21kworker/0:112:03:430
121650380irq/29-eth0_g0_13-21kworker/0:111:47:210
121650380irq/29-eth0_g0_13-21kworker/0:109:55:430
121650380irq/29-eth0_g0_13-21kworker/0:109:40:430
121650380irq/29-eth0_g0_121ksoftirqd/111:32:491
121650380irq/29-eth0_g0_121ksoftirqd/110:51:201
121380ksoftirqd/1121750irq/30-eth0_g0_11:23:270
121380ksoftirqd/1121650irq/29-eth0_g0_08:25:331
1139199389cyclictest12647-21latency_hist07:10:161
1139199389cyclictest12647-21latency_hist07:10:161
1139199382cyclictest27270-21awk10:20:321
1139199382cyclictest25205-21irqstats08:00:301
1139199381cyclictest24045-21sort07:55:301
1139199381cyclictest22045-21df10:00:261
1139199381cyclictest20743-21grep07:40:381
1139199381cyclictest17070-21grep07:25:371
121750370irq/30-eth0_g0_14558-21ps11:40:341
121650370irq/29-eth0_g0_13-21kworker/0:112:17:120
121650370irq/29-eth0_g0_13-21kworker/0:110:52:260
121370ksoftirqd/1121750irq/30-eth0_g0_07:55:180
121370ksoftirqd/1121650irq/29-eth0_g0_08:34:121
1139199372cyclictest16559-21cpu11:50:281
1139199371cyclictest30421-21awk08:20:351
1139199371cyclictest2431-21sed08:40:291
1139199371cyclictest2431-21sed08:40:291
1139199371cyclictest14613-21unixbench_singl07:15:371
121750360irq/30-eth0_g0_10779-21sendmail_mailqu07:00:361
121750360irq/30-eth0_g0_0-21swapper/107:45:381
121650360irq/29-eth0_g0_1964-21runrttasks08:28:350
121360ksoftirqd/1121750irq/30-eth0_g0_07:46:240
11391993621cyclictest1964-21runrttasks07:54:221
1139199361cyclictest26909-21sed08:05:381
1139199361cyclictest15792-21grep07:20:371
1139199361cyclictest12776-21df07:10:271
121650350irq/29-eth0_g0_26750-21sendmail_mailst08:05:370
121350ksoftirqd/127554-21df08:10:281
121750340irq/30-eth0_g0_7669-21open_files09:00:341
121750340irq/30-eth0_g0_1808-21grep08:35:401
121750340irq/30-eth0_g0_1808-21grep08:35:401
1139199341cyclictest19971-21chrt07:40:161
1139199331cyclictest7109-21sshd08:59:361
1139199331cyclictest0-21swapper/108:50:301
1139199331cyclictest0-21swapper/108:50:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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