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2025-11-20 - 00:17

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 Wed Nov 19, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211130ksoftirqd/1121750irq/30-eth0_g0_11:44:101
121980ksoftirqd/1121750irq/30-eth0_g0_07:35:511
216142670sleep0121650irq/29-eth0_g0_12:31:010
121630ksoftirqd/1112162chrt09:36:520
121550ksoftirqd/1121750irq/30-eth0_g0_09:56:461
295332500sleep0121650irq/29-eth0_g0_10:51:100
121500ksoftirqd/1121750irq/30-eth0_g0_09:30:160
121480ksoftirqd/1121750irq/30-eth0_g0_11:30:120
121460ksoftirqd/1121750irq/30-eth0_g0_12:22:091
121460ksoftirqd/1121750irq/30-eth0_g0_11:52:331
121460ksoftirqd/1121750irq/30-eth0_g0_11:02:391
121460ksoftirqd/1121750irq/30-eth0_g0_10:20:061
121460ksoftirqd/1121750irq/30-eth0_g0_09:38:211
121460ksoftirqd/1121650irq/29-eth0_g0_10:56:501
121460ksoftirqd/1121650irq/29-eth0_g0_08:24:321
121750450irq/30-eth0_g0_31ksoftirqd/007:05:100
121650450irq/29-eth0_g0_31ksoftirqd/009:00:180
121450ksoftirqd/1121750irq/30-eth0_g0_11:49:071
121450ksoftirqd/1121650irq/29-eth0_g0_11:31:251
121450ksoftirqd/1121650irq/29-eth0_g0_07:23:281
319492440sleep0121650irq/29-eth0_g0_11:00:450
247552440sleep1121750irq/30-eth0_g0_10:32:361
121650440irq/29-eth0_g0_13-21kworker/0:110:30:180
121440ksoftirqd/1121750irq/30-eth0_g0_12:19:441
121440ksoftirqd/1121650irq/29-eth0_g0_07:12:381
713899436cyclictest1894-21runrttasks10:39:511
121650430irq/29-eth0_g0_6024-21latency_hist11:29:510
121650430irq/29-eth0_g0_121ksoftirqd/109:16:490
121430ksoftirqd/1121650irq/29-eth0_g0_10:25:271
121430ksoftirqd/1121650irq/29-eth0_g0_10:25:271
121430ksoftirqd/1121650irq/29-eth0_g0_09:25:081
713899421cyclictest21325-21unixbench_multi08:05:141
171002420sleep1121750irq/30-eth0_g0_10:00:151
121750420irq/30-eth0_g0_1219-21kworker/1:210:11:181
121750420irq/30-eth0_g0_1219-21kworker/1:209:30:151
121650420irq/29-eth0_g0_121ksoftirqd/111:15:081
121650420irq/29-eth0_g0_121ksoftirqd/110:58:160
121420ksoftirqd/1121750irq/30-eth0_g0_09:24:520
121420ksoftirqd/1121650irq/29-eth0_g0_11:07:151
121750410irq/30-eth0_g0_1219-21kworker/1:211:58:241
121750410irq/30-eth0_g0_1219-21kworker/1:211:10:301
121410ksoftirqd/1121750irq/30-eth0_g0_11:24:390
121410ksoftirqd/1121750irq/30-eth0_g0_11:24:390
121410ksoftirqd/1121750irq/30-eth0_g0_08:15:180
121410ksoftirqd/1121650irq/29-eth0_g0_09:58:400
713899401cyclictest1894-21runrttasks10:08:081
713899401cyclictest12067-21cat07:29:521
121750400irq/30-eth0_g0_21670-21taskset12:31:401
121750400irq/30-eth0_g0_1219-21kworker/1:211:36:241
121750400irq/30-eth0_g0_121ksoftirqd/111:20:401
121750400irq/30-eth0_g0_121ksoftirqd/111:20:401
121650400irq/29-eth0_g0_28172-21unixbench_singl10:45:160
121650400irq/29-eth0_g0_1894-21runrttasks11:18:510
121650400irq/29-eth0_g0_13-21kworker/0:112:20:520
121650400irq/29-eth0_g0_13-21kworker/0:109:50:120
121400ksoftirqd/1121750irq/30-eth0_g0_08:28:130
121400ksoftirqd/1121750irq/30-eth0_g0_08:20:170
121400ksoftirqd/1121650irq/29-eth0_g0_08:55:101
121400ksoftirqd/1121650irq/29-eth0_g0_08:55:101
713899391cyclictest4119-21diskmemload09:17:201
713899391cyclictest15109-21find07:40:131
121750390irq/30-eth0_g0_31ksoftirqd/012:11:570
121750390irq/30-eth0_g0_1219-21kworker/1:210:15:411
121650390irq/29-eth0_g0_713799cyclictest10:00:040
121650390irq/29-eth0_g0_1894-21runrttasks11:11:500
121650390irq/29-eth0_g0_13-21kworker/0:112:25:170
121650390irq/29-eth0_g0_13-21kworker/0:110:35:240
121650390irq/29-eth0_g0_121ksoftirqd/111:07:300
121650390irq/29-eth0_g0_121ksoftirqd/109:13:320
121390ksoftirqd/1121750irq/30-eth0_g0_12:18:080
121390ksoftirqd/1121750irq/30-eth0_g0_12:06:270
121390ksoftirqd/1121750irq/30-eth0_g0_12:02:000
121390ksoftirqd/1121750irq/30-eth0_g0_11:49:590
121390ksoftirqd/1121750irq/30-eth0_g0_11:47:580
121390ksoftirqd/1121750irq/30-eth0_g0_11:38:040
121390ksoftirqd/1121750irq/30-eth0_g0_10:44:200
121390ksoftirqd/1121750irq/30-eth0_g0_10:08:300
121390ksoftirqd/1121750irq/30-eth0_g0_09:46:420
121390ksoftirqd/1121750irq/30-eth0_g0_09:26:250
121390ksoftirqd/1121750irq/30-eth0_g0_07:43:500
121390ksoftirqd/1121650irq/29-eth0_g0_08:48:391
713899381cyclictest279572sleep110:45:141
713899381cyclictest14099-21grep12:00:151
713899381cyclictest12708-21cat09:44:511
121750380irq/30-eth0_g0_20508-21taskset12:27:231
121750380irq/30-eth0_g0_1219-21kworker/1:211:28:111
121750380irq/30-eth0_g0_121ksoftirqd/109:21:291
121750380irq/30-eth0_g0_0-21swapper/109:50:531
121650380irq/29-eth0_g0_713799cyclictest10:27:190
121650380irq/29-eth0_g0_713799cyclictest10:27:190
121650380irq/29-eth0_g0_31ksoftirqd/010:10:040
121650380irq/29-eth0_g0_1894-21runrttasks11:43:190
121650380irq/29-eth0_g0_13-21kworker/0:110:19:340
121650380irq/29-eth0_g0_12866-21/usr/sbin/munin11:55:170
121650380irq/29-eth0_g0_12102-21chrt09:40:150
121650380irq/29-eth0_g0_0-21swapper/010:20:100
121380ksoftirqd/1121650irq/29-eth0_g0_09:48:431
713899372cyclictest16326-21rt-features07:45:121
713899371cyclictest29990-21unixbench_singl08:40:171
713899371cyclictest26798-21awk10:40:141
713899371cyclictest26129-21awk08:25:121
121750370irq/30-eth0_g0_1219-21kworker/1:212:10:101
121750370irq/30-eth0_g0_121ksoftirqd/112:06:171
121750370irq/30-eth0_g0_0-21swapper/110:51:381
121650370irq/29-eth0_g0_28306-21latency08:35:070
121650370irq/29-eth0_g0_24137-21runrttasks08:18:091
121650370irq/29-eth0_g0_1894-21runrttasks08:30:040
121650370irq/29-eth0_g0_1894-21runrttasks08:00:260
121370ksoftirqd/1121650irq/29-eth0_g0_08:12:141
121370ksoftirqd/1121650irq/29-eth0_g0_07:29:581
713899361cyclictest19394-21seq07:59:521
713899361cyclictest17522-21processes07:50:121
121650360irq/29-eth0_g0_6983-21runrttasks07:08:141
121650360irq/29-eth0_g0_5223-21runrttasks09:13:301
121650360irq/29-eth0_g0_4178-21grep09:09:520
121650360irq/29-eth0_g0_1894-21runrttasks12:35:320
121650360irq/29-eth0_g0_1894-21runrttasks08:55:020
121650360irq/29-eth0_g0_1894-21runrttasks08:55:020
121650360irq/29-eth0_g0_1894-21runrttasks07:20:410
121650360irq/29-eth0_g0_1894-21runrttasks07:12:190
121360ksoftirqd/1121750irq/30-eth0_g0_08:06:290
121360ksoftirqd/1121750irq/30-eth0_g0_07:32:310
713899351cyclictest22640-21wc12:35:171
713899351cyclictest19558-21df_abs08:00:071
121650350irq/29-eth0_g0_9013-21sendmail_mailqu07:15:280
121650350irq/29-eth0_g0_435-21latency_hist08:54:530
121650350irq/29-eth0_g0_31029-21rt-features08:45:120
121650350irq/29-eth0_g0_1894-21runrttasks08:44:110
121650350irq/29-eth0_g0_1894-21runrttasks07:57:400
121650350irq/29-eth0_g0_11228-21ls07:25:090
121650350irq/29-eth0_g0_0-21swapper/007:45:050
121350ksoftirqd/1121750irq/30-eth0_g0_07:39:300
121350ksoftirqd/1121650irq/29-eth0_g0_08:54:531
713899341cyclictest3364-21/usr/sbin/munin09:05:091
121650340irq/29-eth0_g0_0-21swapper/007:50:130
713899330cyclictest0-21swapper/108:33:111
121650330irq/29-eth0_g0_1894-21runrttasks08:12:430
121330ksoftirqd/19262-21taskset07:16:071
121750320irq/30-eth0_g0_0-21swapper/108:35:101
121650320irq/29-eth0_g0_2702-21runrttasks09:02:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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