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2026-03-13 - 18:10

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Fri Mar 13, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211030ksoftirqd/1121750irq/30-eth0_g0_10:31:591
83202900sleep0121750irq/30-eth0_g0_10:52:450
121820ksoftirqd/1121650irq/29-eth0_g0_08:15:090
121680ksoftirqd/1121750irq/30-eth0_g0_10:35:571
326332600sleep1121650irq/29-eth0_g0_12:30:411
275832520sleep1121750irq/30-eth0_g0_12:10:111
307692510sleep0121650irq/29-eth0_g0_10:10:400
121510ksoftirqd/1121750irq/30-eth0_g0_12:19:511
121650500irq/29-eth0_g0_31ksoftirqd/010:30:090
172632470sleep0121750irq/30-eth0_g0_09:15:190
121470ksoftirqd/1121750irq/30-eth0_g0_11:07:191
121470ksoftirqd/1121750irq/30-eth0_g0_10:10:291
121470ksoftirqd/1121650irq/29-eth0_g0_11:20:021
121470ksoftirqd/1121650irq/29-eth0_g0_08:24:011
121470ksoftirqd/1121650irq/29-eth0_g0_08:24:011
121650460irq/29-eth0_g0_31885-21grep10:15:120
121650460irq/29-eth0_g0_31885-21grep10:15:120
121450ksoftirqd/1121750irq/30-eth0_g0_09:51:551
121450ksoftirqd/1121650irq/29-eth0_g0_10:05:411
121450ksoftirqd/1121650irq/29-eth0_g0_09:35:451
121450ksoftirqd/1121650irq/29-eth0_g0_08:37:501
121440ksoftirqd/1121650irq/29-eth0_g0_07:40:481
121440ksoftirqd/1121650irq/29-eth0_g0_07:12:221
121440ksoftirqd/1121650irq/29-eth0_g0_07:12:221
121750430irq/30-eth0_g0_470-21kworker/1:112:00:371
121750430irq/30-eth0_g0_121ksoftirqd/111:02:381
121650430irq/29-eth0_g0_31ksoftirqd/009:49:150
121650430irq/29-eth0_g0_17803-21chrt07:05:110
121430ksoftirqd/1121650irq/29-eth0_g0_11:15:051
121430ksoftirqd/1121650irq/29-eth0_g0_08:02:281
279122420sleep0121650irq/29-eth0_g0_12:12:470
248982420chrt121750irq/30-eth0_g0_07:35:091
177422420sleep1121750irq/30-eth0_g0_09:19:581
121750420irq/30-eth0_g0_470-21kworker/1:111:58:381
121750420irq/30-eth0_g0_31ksoftirqd/007:20:120
121650420irq/29-eth0_g0_13-21kworker/0:111:29:170
121650420irq/29-eth0_g0_121ksoftirqd/111:51:320
121420ksoftirqd/117766-21sed07:05:111
1823399412cyclictest2171-21lldpd11:49:041
121750410irq/30-eth0_g0_470-21kworker/1:111:50:501
121750410irq/30-eth0_g0_470-21kworker/1:110:24:251
121750410irq/30-eth0_g0_470-21kworker/1:109:33:141
121750410irq/30-eth0_g0_470-21kworker/1:109:33:141
121750410irq/30-eth0_g0_121ksoftirqd/110:04:451
121750410irq/30-eth0_g0_121ksoftirqd/109:43:011
121650410irq/29-eth0_g0_31ksoftirqd/009:12:360
121650410irq/29-eth0_g0_2029-21runrttasks11:31:370
121650410irq/29-eth0_g0_13883-21ntp_offset11:15:070
121650410irq/29-eth0_g0_13-21kworker/0:112:00:580
121650410irq/29-eth0_g0_13-21kworker/0:109:21:340
121410ksoftirqd/1121650irq/29-eth0_g0_09:05:081
121750400irq/30-eth0_g0_470-21kworker/1:111:43:351
121750400irq/30-eth0_g0_470-21kworker/1:110:45:351
121750400irq/30-eth0_g0_470-21kworker/1:109:13:261
121750400irq/30-eth0_g0_16641-21awk11:25:131
121750400irq/30-eth0_g0_121ksoftirqd/109:25:271
121650400irq/29-eth0_g0_13-21kworker/0:112:16:180
121650400irq/29-eth0_g0_13-21kworker/0:111:39:280
121650400irq/29-eth0_g0_13-21kworker/0:111:20:300
121650400irq/29-eth0_g0_13-21kworker/0:111:13:090
121650400irq/29-eth0_g0_13-21kworker/0:111:06:510
121650400irq/29-eth0_g0_13-21kworker/0:110:55:090
121650400irq/29-eth0_g0_13-21kworker/0:110:38:190
121650400irq/29-eth0_g0_13-21kworker/0:109:39:410
121650400irq/29-eth0_g0_13-21kworker/0:109:33:400
121650400irq/29-eth0_g0_13-21kworker/0:109:33:400
121400ksoftirqd/1121750irq/30-eth0_g0_10:22:350
121400ksoftirqd/1121650irq/29-eth0_g0_10:44:471
1823399392cyclictest128462sleep109:00:021
1823399391cyclictest6018-21taskset08:30:091
1823399391cyclictest30051-21tail12:20:121
1823399391cyclictest15203-21diskmemload10:27:191
1823399391cyclictest11079-21unixbench_singl08:50:141
121750390irq/30-eth0_g0_4701kworker/1:112:05:371
121750390irq/30-eth0_g0_470-21kworker/1:111:12:211
121750390irq/30-eth0_g0_470-21kworker/1:109:49:381
121750390irq/30-eth0_g0_470-21kworker/1:109:17:371
121750390irq/30-eth0_g0_0-21swapper/110:50:491
121650390irq/29-eth0_g0_31ksoftirqd/012:26:100
121650390irq/29-eth0_g0_31ksoftirqd/012:26:100
121650390irq/29-eth0_g0_31ksoftirqd/010:25:040
121650390irq/29-eth0_g0_28150-21timerandwakeup10:00:090
121650390irq/29-eth0_g0_14689-21grep09:05:110
121650390irq/29-eth0_g0_13-21kworker/0:111:58:130
121650390irq/29-eth0_g0_13-21kworker/0:110:47:590
121650390irq/29-eth0_g0_13-21kworker/0:110:06:340
121390ksoftirqd/1121750irq/30-eth0_g0_11:42:020
121390ksoftirqd/1121750irq/30-eth0_g0_11:02:030
121390ksoftirqd/1121750irq/30-eth0_g0_09:54:530
121390ksoftirqd/1121750irq/30-eth0_g0_09:41:070
121390ksoftirqd/1121750irq/30-eth0_g0_09:28:480
121390ksoftirqd/1121750irq/30-eth0_g0_08:08:220
121390ksoftirqd/1121750irq/30-eth0_g0_07:29:040
121390ksoftirqd/1121650irq/29-eth0_g0_11:38:031
121390ksoftirqd/1121650irq/29-eth0_g0_07:58:321
121390ksoftirqd/1121650irq/29-eth0_g0_07:27:111
1823399382cyclictest32182-21ntp_states08:05:081
1823399381cyclictest8595-21/usr/sbin/munin10:55:041
121750380irq/30-eth0_g0_470-21kworker/1:112:29:341
121750380irq/30-eth0_g0_470-21kworker/1:112:29:341
121750380irq/30-eth0_g0_470-21kworker/1:109:59:431
121750380irq/30-eth0_g0_121ksoftirqd/111:30:241
121650380irq/29-eth0_g0_31ksoftirqd/007:45:120
121650380irq/29-eth0_g0_2029-21runrttasks09:04:500
121650380irq/29-eth0_g0_2029-21runrttasks08:40:270
121650380irq/29-eth0_g0_13-21kworker/0:112:30:350
121650380irq/29-eth0_g0_13-21kworker/0:112:06:260
121650380irq/29-eth0_g0_0-21swapper/008:10:030
121380ksoftirqd/1121750irq/30-eth0_g0_12:37:170
121380ksoftirqd/1121750irq/30-eth0_g0_12:21:490
121380ksoftirqd/1121750irq/30-eth0_g0_08:49:250
121380ksoftirqd/1121750irq/30-eth0_g0_08:49:250
121380ksoftirqd/1121650irq/29-eth0_g0_08:25:081
121380ksoftirqd/1121650irq/29-eth0_g0_08:13:471
121380ksoftirqd/1121650irq/29-eth0_g0_07:47:451
121380ksoftirqd/1121650irq/29-eth0_g0_07:34:161
1823399371cyclictest9395-21chrt08:45:061
1823399371cyclictest9395-21chrt08:45:061
1823399371cyclictest21298-21seq07:20:101
121750370irq/30-eth0_g0_0-21swapper/112:39:471
121650370irq/29-eth0_g0_25731-21grep09:50:120
121650370irq/29-eth0_g0_2029-21runrttasks08:32:020
121650370irq/29-eth0_g0_2029-21runrttasks07:53:300
121650370irq/29-eth0_g0_12789-21latency_hist08:59:520
121650370irq/29-eth0_g0_121ksoftirqd/110:18:471
121650370irq/29-eth0_g0_121ksoftirqd/110:18:471
1823399361cyclictest28491-21awk07:50:071
1823399361cyclictest20197-21unixbench_multi07:15:121
121650360irq/29-eth0_g0_2029-21runrttasks08:51:440
121650360irq/29-eth0_g0_2029-21runrttasks08:29:400
121650360irq/29-eth0_g0_2029-21runrttasks08:02:270
121650360irq/29-eth0_g0_2029-21runrttasks07:56:030
121650360irq/29-eth0_g0_2029-21runrttasks07:44:150
121650360irq/29-eth0_g0_13-21kworker/0:110:41:590
121360ksoftirqd/1121750irq/30-eth0_g0_11:46:040
121360ksoftirqd/1121650irq/29-eth0_g0_08:43:511
1823399351cyclictest2349-21zcat08:15:111
1823399351cyclictest12278-21tail08:55:131
121650350irq/29-eth0_g0_24840-21ntpq07:35:080
121650350irq/29-eth0_g0_2029-21runrttasks07:13:370
121650350irq/29-eth0_g0_2029-21runrttasks07:13:370
121650350irq/29-eth0_g0_0-21swapper/007:15:130
121650340irq/29-eth0_g0_7095-21ntpdc08:35:060
121650340irq/29-eth0_g0_23276-21runrttasks07:30:010
121650340irq/29-eth0_g0_2029-21runrttasks08:20:190
121650340irq/29-eth0_g0_2029-21runrttasks08:20:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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