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2026-04-10 - 14:42

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 Fri Apr 10, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
722621020sleep13129650irq/29-eth0_g0_09:26:241
267772940sleep03129750irq/30-eth0_g0_08:34:370
121840ksoftirqd/13129750irq/30-eth0_g0_11:29:211
121840ksoftirqd/13129750irq/30-eth0_g0_11:29:211
44052740sleep03129650irq/29-eth0_g0_11:28:080
44052740sleep03129650irq/29-eth0_g0_11:28:080
121680ksoftirqd/13129750irq/30-eth0_g0_07:39:391
121670ksoftirqd/13129750irq/30-eth0_g0_10:54:040
37702660sleep03129750irq/30-eth0_g0_09:14:030
144612610sleep13129650irq/29-eth0_g0_09:54:551
121500ksoftirqd/13129750irq/30-eth0_g0_12:34:420
121500ksoftirqd/13129750irq/30-eth0_g0_09:40:451
121490ksoftirqd/13129650irq/29-eth0_g0_11:35:581
3129650480irq/29-eth0_g0_31ksoftirqd/007:04:420
3129750460irq/30-eth0_g0_31295-21kworker/1:110:05:501
3129750460irq/30-eth0_g0_31295-21kworker/1:110:05:501
3129750440irq/30-eth0_g0_31295-21kworker/1:112:09:341
3129750440irq/30-eth0_g0_31295-21kworker/1:112:04:301
121440ksoftirqd/13129750irq/30-eth0_g0_11:05:530
121440ksoftirqd/13129750irq/30-eth0_g0_10:23:101
3129750430irq/30-eth0_g0_31295-21kworker/1:110:26:291
191342430sleep13129650irq/29-eth0_g0_12:28:121
3129750420irq/30-eth0_g0_31295-21kworker/1:112:00:421
3129750420irq/30-eth0_g0_31295-21kworker/1:109:53:321
3129750420irq/30-eth0_g0_31295-21kworker/1:109:12:131
3129650420irq/29-eth0_g0_28992-21swap10:54:440
267752420sleep03129650irq/29-eth0_g0_10:45:290
193172420sleep13129750irq/30-eth0_g0_12:29:251
121420ksoftirqd/13129750irq/30-eth0_g0_11:11:230
3129750410irq/30-eth0_g0_31295-21kworker/1:111:22:291
3129750410irq/30-eth0_g0_31295-21kworker/1:111:10:581
121410ksoftirqd/13129750irq/30-eth0_g0_10:16:481
3129750400irq/30-eth0_g0_31295-21kworker/1:110:30:231
3129750400irq/30-eth0_g0_31295-21kworker/1:109:23:001
3129750400irq/30-eth0_g0_121ksoftirqd/109:15:381
3129650400irq/29-eth0_g0_13-21kworker/0:109:22:590
121400ksoftirqd/13129750irq/30-eth0_g0_07:26:300
3129750390irq/30-eth0_g0_31295-21kworker/1:112:36:221
3129750390irq/30-eth0_g0_31295-21kworker/1:112:15:111
3129750390irq/30-eth0_g0_31295-21kworker/1:111:58:031
3129750390irq/30-eth0_g0_31295-21kworker/1:111:30:471
3129750390irq/30-eth0_g0_31295-21kworker/1:111:05:151
3129750390irq/30-eth0_g0_31295-21kworker/1:110:59:451
3129750390irq/30-eth0_g0_31295-21kworker/1:110:45:071
3129750390irq/30-eth0_g0_19888-21chrt08:05:071
3129750390irq/30-eth0_g0_121ksoftirqd/111:47:281
3129650390irq/29-eth0_g0_23583-21df10:34:330
3129650390irq/29-eth0_g0_13-21kworker/0:112:19:390
3129650390irq/29-eth0_g0_13-21kworker/0:112:08:530
3129650390irq/29-eth0_g0_13-21kworker/0:111:59:300
3129650390irq/29-eth0_g0_13-21kworker/0:111:51:410
3129650390irq/29-eth0_g0_13-21kworker/0:109:48:380
3129650390irq/29-eth0_g0_13-21kworker/0:109:33:360
3129650390irq/29-eth0_g0_12454-21unixbench_singl07:34:430
3129650390irq/29-eth0_g0_0-21swapper/008:49:370
3129750380irq/30-eth0_g0_31295-21kworker/1:111:52:281
3129750380irq/30-eth0_g0_31295-21kworker/1:110:57:141
3129750380irq/30-eth0_g0_31295-21kworker/1:110:50:001
3129750380irq/30-eth0_g0_31295-21kworker/1:110:40:481
3129750380irq/30-eth0_g0_31295-21kworker/1:110:38:471
3129750380irq/30-eth0_g0_31295-21kworker/1:110:11:001
3129750380irq/30-eth0_g0_31295-21kworker/1:109:31:111
3129750380irq/30-eth0_g0_121ksoftirqd/112:20:361
3129750380irq/30-eth0_g0_0-21swapper/111:15:241
3129650380irq/29-eth0_g0_32690-21df_abs08:59:330
3129650380irq/29-eth0_g0_13-21kworker/0:111:58:100
3129650380irq/29-eth0_g0_13-21kworker/0:110:14:140
3129650380irq/29-eth0_g0_13-21kworker/0:109:57:130
3129650380irq/29-eth0_g0_13-21kworker/0:109:44:170
3129650380irq/29-eth0_g0_13-21kworker/0:109:15:430
121380ksoftirqd/13129650irq/29-eth0_g0_11:39:360
121380ksoftirqd/13129650irq/29-eth0_g0_09:49:410
121380ksoftirqd/111667-21runrttasks07:34:221
5528993724cyclictest29206-21grep08:44:371
3129750370irq/30-eth0_g0_4818-21/usr/sbin/munin07:04:401
3129750370irq/30-eth0_g0_31295-21kworker/1:110:00:081
3129750370irq/30-eth0_g0_121ksoftirqd/111:40:081
3129750370irq/30-eth0_g0_121ksoftirqd/109:44:301
3129650370irq/29-eth0_g0_8913-21unixbench_multi11:44:430
3129650370irq/29-eth0_g0_6316-21unixbench_singl07:09:430
3129650370irq/29-eth0_g0_218112sleep010:24:470
3129650370irq/29-eth0_g0_1875-21runrttasks07:51:240
3129650370irq/29-eth0_g0_1875-21runrttasks07:45:030
3129650370irq/29-eth0_g0_13-21kworker/0:112:30:430
3129650370irq/29-eth0_g0_13-21kworker/0:112:17:370
3129650370irq/29-eth0_g0_13-21kworker/0:111:30:580
3129650370irq/29-eth0_g0_13-21kworker/0:111:20:210
3129650370irq/29-eth0_g0_13-21kworker/0:111:17:420
3129650370irq/29-eth0_g0_13-21kworker/0:110:59:290
3129650370irq/29-eth0_g0_13-21kworker/0:110:29:470
3129650370irq/29-eth0_g0_13-21kworker/0:110:20:460
3129650370irq/29-eth0_g0_13-21kworker/0:110:19:110
3129650370irq/29-eth0_g0_13-21kworker/0:110:00:320
3129650370irq/29-eth0_g0_13-21kworker/0:109:27:010
3129650370irq/29-eth0_g0_0-21swapper/012:24:370
121370ksoftirqd/13129750irq/30-eth0_g0_09:36:480
3129750360irq/30-eth0_g0_31295-21kworker/1:109:35:251
3129750360irq/30-eth0_g0_15507-21df07:49:341
3129650360irq/29-eth0_g0_6526-21runrttasks11:34:430
3129650360irq/29-eth0_g0_2064-21unixbench_multi09:04:420
3129650360irq/29-eth0_g0_1875-21runrttasks08:24:210
3129650360irq/29-eth0_g0_1875-21runrttasks08:18:180
3129650360irq/29-eth0_g0_1875-21runrttasks08:10:050
3129650360irq/29-eth0_g0_1875-21runrttasks07:42:050
3129650360irq/29-eth0_g0_1875-21runrttasks07:30:000
3129650360irq/29-eth0_g0_13-21kworker/0:112:09:280
3129650360irq/29-eth0_g0_13-21kworker/0:110:04:310
3129650360irq/29-eth0_g0_13-21kworker/0:110:04:310
121360ksoftirqd/18917-21taskset07:21:001
121360ksoftirqd/13129750irq/30-eth0_g0_07:20:440
5528993522cyclictest14851-21unixbench_multi07:44:421
3129650350irq/29-eth0_g0_7472-21unixbench_multi07:14:430
3129650350irq/29-eth0_g0_25289-21sendmail_mailqu10:39:410
3129650350irq/29-eth0_g0_1875-21runrttasks08:25:300
3129650350irq/29-eth0_g0_1875-21runrttasks08:03:460
121350ksoftirqd/13129650irq/29-eth0_g0_07:56:241
3129750340irq/30-eth0_g0_26876-21ntpq08:34:391
3129750340irq/30-eth0_g0_1875-21runrttasks08:56:021
3129650340irq/29-eth0_g0_29002-21df08:44:330
3129650340irq/29-eth0_g0_28905-21latency_hist08:44:230
3129650340irq/29-eth0_g0_25855-21timerandwakeup08:29:420
3129650340irq/29-eth0_g0_19120-21/usr/sbin/munin08:04:410
3129650340irq/29-eth0_g0_1875-21runrttasks09:09:201
3129650340irq/29-eth0_g0_1875-21runrttasks07:54:420
3129650340irq/29-eth0_g0_0-21swapper/008:54:410
5528993320cyclictest23337-21find08:19:421
3129750330irq/30-eth0_g0_1875-21runrttasks07:35:511
121330ksoftirqd/118231-21chrt07:59:381
3129750320irq/30-eth0_g0_32696-21df_abs08:59:331
3129750320irq/30-eth0_g0_0-21swapper/108:15:541
3129750320irq/30-eth0_g0_0-21swapper/108:12:461
3129650320irq/29-eth0_g0_24709-21unixbench_singl08:24:441
121320ksoftirqd/130309-21sed08:49:331
5528993120cyclictest79792sleep107:19:221
5528993118cyclictest6022-21taskset07:09:391
3129750310irq/30-eth0_g0_0-21swapper/107:27:541
3129750300irq/30-eth0_g0_27957-21latency08:39:351
3129650290irq/29-eth0_g0_1875-21runrttasks08:29:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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