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2026-04-07 - 11:38

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 Tue Apr 07, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3062921630sleep13129650irq/29-eth0_g0_21:34:501
121930ksoftirqd/13129750irq/30-eth0_g0_20:29:531
147792790sleep13129650irq/29-eth0_g0_22:44:421
57762770sleep13129650irq/29-eth0_g0_00:19:441
132852750sleep13129650irq/29-eth0_g0_22:38:591
28302670sleep13129750irq/30-eth0_g0_00:07:371
318242620sleep13129650irq/29-eth0_g0_23:54:381
318242620sleep13129650irq/29-eth0_g0_23:54:381
215162570sleep03129650irq/29-eth0_g0_23:09:520
215162570sleep03129650irq/29-eth0_g0_23:09:520
121540ksoftirqd/13129750irq/30-eth0_g0_20:28:141
229532510sleep13129650irq/29-eth0_g0_23:17:201
121510ksoftirqd/13129750irq/30-eth0_g0_21:26:231
121500ksoftirqd/13129750irq/30-eth0_g0_19:42:061
118942490sleep13129750irq/30-eth0_g0_22:32:041
3129650480irq/29-eth0_g0_31ksoftirqd/022:12:470
121470ksoftirqd/13129750irq/30-eth0_g0_21:29:441
121470ksoftirqd/13129650irq/29-eth0_g0_23:38:341
121470ksoftirqd/13129650irq/29-eth0_g0_20:37:351
3129650460irq/29-eth0_g0_31097-21unixbench_singl19:24:510
121460ksoftirqd/13129750irq/30-eth0_g0_21:55:461
3129650450irq/29-eth0_g0_19946-21ntp_offset23:04:470
3129650450irq/29-eth0_g0_15338-21sed22:44:520
121450ksoftirqd/13129750irq/30-eth0_g0_23:21:220
121450ksoftirqd/13129750irq/30-eth0_g0_22:53:091
121450ksoftirqd/13129750irq/30-eth0_g0_22:53:091
81252440sleep03129650irq/29-eth0_g0_20:04:460
3129650440irq/29-eth0_g0_13-21kworker/0:100:11:290
121440ksoftirqd/13129650irq/29-eth0_g0_23:40:161
121440ksoftirqd/13129650irq/29-eth0_g0_20:14:491
121440ksoftirqd/13129650irq/29-eth0_g0_00:28:131
3129750430irq/30-eth0_g0_31295-21kworker/1:123:49:121
3129750430irq/30-eth0_g0_121ksoftirqd/121:44:461
3129650430irq/29-eth0_g0_31ksoftirqd/020:39:490
2663799431cyclictest26357-21unixbench_singl23:29:521
3129750420irq/30-eth0_g0_121ksoftirqd/121:24:171
3129650420irq/29-eth0_g0_31ksoftirqd/022:54:320
247162420sleep13129750irq/30-eth0_g0_21:12:271
97412410sleep03129650irq/29-eth0_g0_22:24:390
3129750410irq/30-eth0_g0_31295-21kworker/1:122:19:561
3129650410irq/29-eth0_g0_8284-21memory00:29:430
3129650410irq/29-eth0_g0_31ksoftirqd/021:19:480
3129650410irq/29-eth0_g0_1875-21runrttasks23:32:580
3129650410irq/29-eth0_g0_1875-21runrttasks19:04:400
3129650410irq/29-eth0_g0_13-21kworker/0:100:05:490
276832410sleep03129650irq/29-eth0_g0_23:35:110
2663799411cyclictest6693-21grep22:09:521
2663799411cyclictest23667-21diskmemload23:09:301
121410ksoftirqd/13129650irq/29-eth0_g0_22:03:211
3129750400irq/30-eth0_g0_31295-21kworker/1:122:17:571
3129650400irq/29-eth0_g0_3673-21df21:59:410
3129650400irq/29-eth0_g0_31ksoftirqd/021:42:070
3129650400irq/29-eth0_g0_251142df_abs21:14:430
3129650400irq/29-eth0_g0_13-21kworker/0:123:19:010
3129650400irq/29-eth0_g0_13-21kworker/0:122:52:270
3129650400irq/29-eth0_g0_13-21kworker/0:122:52:270
3129650400irq/29-eth0_g0_13-21kworker/0:122:44:220
3129650400irq/29-eth0_g0_13-21kworker/0:122:33:560
3129650400irq/29-eth0_g0_13-21kworker/0:100:27:090
3129650400irq/29-eth0_g0_0-21swapper/000:02:450
2663799401cyclictest4893-21grep00:14:511
2663799401cyclictest31829-21grep21:39:531
2663799401cyclictest23667-21diskmemload22:40:311
2663799401cyclictest1721-21cat21:49:511
121400ksoftirqd/13129650irq/29-eth0_g0_20:50:031
121400ksoftirqd/13129650irq/29-eth0_g0_19:59:111
121400ksoftirqd/13129650irq/29-eth0_g0_00:09:461
3129750390irq/30-eth0_g0_121ksoftirqd/123:03:531
3129650390irq/29-eth0_g0_31ksoftirqd/023:57:440
3129650390irq/29-eth0_g0_31ksoftirqd/023:57:440
3129650390irq/29-eth0_g0_13-21kworker/0:123:51:390
3129650390irq/29-eth0_g0_13-21kworker/0:122:14:480
3129650390irq/29-eth0_g0_13-21kworker/0:122:06:550
3129650390irq/29-eth0_g0_13-21kworker/0:122:06:550
3129650390irq/29-eth0_g0_13-21kworker/0:121:54:380
3129650390irq/29-eth0_g0_13-21kworker/0:100:34:510
3129650390irq/29-eth0_g0_13-21kworker/0:100:14:400
2663799391cyclictest96632sleep120:09:511
2663799391cyclictest25146-21grep23:24:521
121390ksoftirqd/13129650irq/29-eth0_g0_23:53:551
121390ksoftirqd/13129650irq/29-eth0_g0_22:25:151
121390ksoftirqd/13129650irq/29-eth0_g0_20:00:081
121390ksoftirqd/122599-21df21:04:431
41350380irq/23-fsldma-c28669-21/usr/sbin/munin21:29:460
3129750380irq/30-eth0_g0_31295-21kworker/1:121:19:101
3129750380irq/30-eth0_g0_31295-21kworker/1:100:30:251
3129750380irq/30-eth0_g0_121ksoftirqd/123:22:451
3129750380irq/30-eth0_g0_121ksoftirqd/123:11:191
3129750380irq/30-eth0_g0_121ksoftirqd/123:11:191
3129650380irq/29-eth0_g0_28813-21chrt23:39:510
3129650380irq/29-eth0_g0_13-21kworker/0:123:47:400
3129650380irq/29-eth0_g0_13-21kworker/0:123:25:430
3129650380irq/29-eth0_g0_13-21kworker/0:123:01:380
3129650380irq/29-eth0_g0_13-21kworker/0:122:37:010
3129650380irq/29-eth0_g0_13-21kworker/0:121:49:520
3129650380irq/29-eth0_g0_13-21kworker/0:121:24:370
3129650380irq/29-eth0_g0_13-21kworker/0:121:12:410
3129650380irq/29-eth0_g0_13-21kworker/0:100:20:570
3129650380irq/29-eth0_g0_10867-21sort20:14:500
2663799382cyclictest796-21awk19:34:471
2663799381cyclictest52422sleep122:04:491
2663799381cyclictest52422sleep122:04:491
2663799381cyclictest27192-21ps19:09:471
2663799381cyclictest27192-21ps19:09:471
121380ksoftirqd/13129650irq/29-eth0_g0_22:56:051
121380ksoftirqd/13129650irq/29-eth0_g0_20:56:041
121380ksoftirqd/13129650irq/29-eth0_g0_20:39:551
121380ksoftirqd/13129650irq/29-eth0_g0_19:33:331
121380ksoftirqd/13129650irq/29-eth0_g0_19:29:101
3129650370irq/29-eth0_g0_8833-21missed_timers22:19:460
3129650370irq/29-eth0_g0_31ksoftirqd/019:44:300
3129650370irq/29-eth0_g0_29098-21latency_hist19:19:300
3129650370irq/29-eth0_g0_26989-21latency19:09:430
3129650370irq/29-eth0_g0_26989-21latency19:09:430
3129650370irq/29-eth0_g0_13-21kworker/0:121:35:250
3129650370irq/29-eth0_g0_13-21kworker/0:120:54:400
2663799379cyclictest0-21swapper/100:01:191
2663799372cyclictest28599-21tail19:14:511
2663799371cyclictest3559-21unixbench_multi19:44:511
2663799371cyclictest23667-21diskmemload00:35:311
2663799371cyclictest22469-21cat21:04:311
2663799371cyclictest11548-21taskset20:19:421
3129650360irq/29-eth0_g0_9636-21timerandwakeup20:09:500
3129650360irq/29-eth0_g0_29565-21ntp_kernel_pll_19:19:460
3129650360irq/29-eth0_g0_25950-21proc_pri19:04:491
3129650360irq/29-eth0_g0_19982-21munin-plugin-st20:54:300
3129650360irq/29-eth0_g0_1875-21runrttasks21:07:480
3129650360irq/29-eth0_g0_1875-21runrttasks21:04:290
3129650360irq/29-eth0_g0_1875-21runrttasks19:32:150
3129650360irq/29-eth0_g0_12779-21df20:24:420
3129650360irq/29-eth0_g0_0-21swapper/019:49:510
121360ksoftirqd/13129650irq/29-eth0_g0_21:46:330
3129750350irq/30-eth0_g0_29777-21timerandwakeup19:19:501
3129750350irq/30-eth0_g0_121ksoftirqd/119:51:231
3129650350irq/29-eth0_g0_506-21df_abs19:34:420
3129650350irq/29-eth0_g0_1875-21runrttasks20:35:350
3129650350irq/29-eth0_g0_1875-21runrttasks20:03:370
3129650350irq/29-eth0_g0_1875-21runrttasks19:58:140
3129650350irq/29-eth0_g0_1875-21runrttasks19:49:040
3129650350irq/29-eth0_g0_14177-21irqstats20:29:430
3129750340irq/30-eth0_g0_8132-21wc20:04:461
3129650340irq/29-eth0_g0_12030-21find20:19:510
2663799341cyclictest0-21swapper/120:46:331
3129650330irq/29-eth0_g0_17959-21netstat20:44:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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