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2026-04-09 - 14:56

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 100 highest latencies:
System rack3slot5s.osadl.org (updated Thu Apr 09, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
55062980sleep13129650irq/29-eth0_g0_11:45:481
183442750sleep03129750irq/30-eth0_g0_10:26:110
39832720sleep03129750irq/30-eth0_g0_11:39:440
121680ksoftirqd/13129750irq/30-eth0_g0_10:59:070
115502600sleep13129650irq/29-eth0_g0_12:09:531
121500ksoftirqd/13129650irq/29-eth0_g0_12:20:150
121480ksoftirqd/13129650irq/29-eth0_g0_10:33:431
121480ksoftirqd/13129650irq/29-eth0_g0_09:23:300
121480ksoftirqd/13129650irq/29-eth0_g0_09:23:300
121470ksoftirqd/13129750irq/30-eth0_g0_11:42:331
121460ksoftirqd/13129750irq/30-eth0_g0_09:49:571
121460ksoftirqd/13129650irq/29-eth0_g0_12:32:031
121460ksoftirqd/13129650irq/29-eth0_g0_11:25:361
121460ksoftirqd/13129650irq/29-eth0_g0_09:34:131
3129650450irq/29-eth0_g0_0-21swapper/011:59:420
121450ksoftirqd/13129650irq/29-eth0_g0_07:16:411
3129750440irq/30-eth0_g0_1875-21runrttasks12:21:541
3129650440irq/29-eth0_g0_26064-21/usr/sbin/munin10:59:450
121440ksoftirqd/13129750irq/30-eth0_g0_10:47:501
121440ksoftirqd/13129750irq/30-eth0_g0_09:38:181
121440ksoftirqd/13129650irq/29-eth0_g0_11:39:010
121440ksoftirqd/13129650irq/29-eth0_g0_11:19:341
121440ksoftirqd/13129650irq/29-eth0_g0_09:21:331
121440ksoftirqd/13129650irq/29-eth0_g0_09:21:331
3129750430irq/30-eth0_g0_31295-21kworker/1:110:05:291
3129750430irq/30-eth0_g0_217342sleep110:39:451
3129650430irq/29-eth0_g0_31ksoftirqd/011:20:120
121430ksoftirqd/13129750irq/30-eth0_g0_11:29:301
121430ksoftirqd/13129650irq/29-eth0_g0_11:49:421
3129650420irq/29-eth0_g0_13-21kworker/0:111:13:270
3129650420irq/29-eth0_g0_13-21kworker/0:110:16:250
232652420sleep03129650irq/29-eth0_g0_10:46:260
3129750410irq/30-eth0_g0_121ksoftirqd/111:57:131
3129750410irq/30-eth0_g0_121ksoftirqd/111:34:291
3129650410irq/29-eth0_g0_31ksoftirqd/009:10:210
3129650410irq/29-eth0_g0_13-21kworker/0:112:15:290
3129650410irq/29-eth0_g0_13-21kworker/0:111:55:190
3129650410irq/29-eth0_g0_13-21kworker/0:111:52:590
3129650410irq/29-eth0_g0_13-21kworker/0:111:44:350
26342410chrt3129750irq/30-eth0_g0_07:09:441
201499411cyclictest126432sleep107:49:461
121410ksoftirqd/13129750irq/30-eth0_g0_10:01:050
3129750400irq/30-eth0_g0_31295-21kworker/1:112:04:341
3129750400irq/30-eth0_g0_27281-21chrt11:04:321
3129750400irq/30-eth0_g0_0-21swapper/109:08:391
3129650400irq/29-eth0_g0_31ksoftirqd/012:37:030
3129650400irq/29-eth0_g0_13-21kworker/0:112:29:550
3129650400irq/29-eth0_g0_13-21kworker/0:112:29:160
3129650400irq/29-eth0_g0_13-21kworker/0:112:05:570
3129650400irq/29-eth0_g0_13-21kworker/0:111:32:590
3129650400irq/29-eth0_g0_13-21kworker/0:111:15:580
3129650400irq/29-eth0_g0_13-21kworker/0:111:15:580
3129650400irq/29-eth0_g0_13-21kworker/0:110:49:340
3129650400irq/29-eth0_g0_13-21kworker/0:110:33:070
3129650400irq/29-eth0_g0_13-21kworker/0:110:20:060
3129650400irq/29-eth0_g0_13-21kworker/0:110:11:560
3129650400irq/29-eth0_g0_13-21kworker/0:110:06:230
3129650400irq/29-eth0_g0_13-21kworker/0:109:49:340
3129650400irq/29-eth0_g0_0-21swapper/007:04:450
121400ksoftirqd/13129650irq/29-eth0_g0_09:39:381
3129750390irq/30-eth0_g0_29194-21head11:09:461
3129750390irq/30-eth0_g0_1491-21grep07:04:451
3129750390irq/30-eth0_g0_121ksoftirqd/112:28:211
3129750390irq/30-eth0_g0_121ksoftirqd/110:26:471
3129750390irq/30-eth0_g0_0-21swapper/111:59:581
3129750390irq/30-eth0_g0_0-21swapper/110:52:431
3129650390irq/29-eth0_g0_13-21kworker/0:111:24:260
3129650390irq/29-eth0_g0_13-21kworker/0:111:05:080
3129650390irq/29-eth0_g0_13-21kworker/0:109:37:580
3129650390irq/29-eth0_g0_13-21kworker/0:109:16:340
3129650390irq/29-eth0_g0_11468-21unixbench_singl12:09:450
201499392cyclictest32660-21latency_hist09:14:251
2014993910cyclictest0-21swapper/110:57:481
201499391cyclictest75312sleep107:29:431
201499391cyclictest5949-21taskset07:24:351
201499391cyclictest31436-21diskmemload10:10:421
201499391cyclictest24693-21zcat08:39:431
201499391cyclictest22448-21awk08:29:451
201499391cyclictest11327-21cat09:59:251
121390ksoftirqd/13129650irq/29-eth0_g0_08:24:331
121390ksoftirqd/13129650irq/29-eth0_g0_07:37:241
121390ksoftirqd/13129650irq/29-eth0_g0_07:37:241
3129750380irq/30-eth0_g0_31ksoftirqd/010:40:500
3129750380irq/30-eth0_g0_121ksoftirqd/112:35:201
3129750380irq/30-eth0_g0_121ksoftirqd/110:17:221
3129750380irq/30-eth0_g0_121ksoftirqd/110:00:371
3129750380irq/30-eth0_g0_0-21swapper/111:04:221
3129650380irq/29-eth0_g0_8487-21latency07:34:380
3129650380irq/29-eth0_g0_8487-21latency07:34:380
3129650380irq/29-eth0_g0_8344-21unixbench_multi09:44:460
3129650380irq/29-eth0_g0_8178-21latency_hist07:34:250
3129650380irq/29-eth0_g0_3079-21memory09:24:390
3129650380irq/29-eth0_g0_31ksoftirqd/009:56:570
3129650380irq/29-eth0_g0_31ksoftirqd/009:29:340
3129650380irq/29-eth0_g0_27297-21unixbench_singl08:49:460
3129650380irq/29-eth0_g0_13-21kworker/0:110:36:260
3129650380irq/29-eth0_g0_13-21kworker/0:109:39:480
3129650380irq/29-eth0_g0_121ksoftirqd/111:17:041
3129650380irq/29-eth0_g0_121ksoftirqd/111:17:041
201499389cyclictest0-21swapper/109:44:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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