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2026-04-04 - 21:53

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 Sat Apr 04, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1817721300sleep0121650irq/29-eth0_g0_10:05:200
121900ksoftirqd/1121750irq/30-eth0_g0_11:54:481
121740ksoftirqd/163852sleep009:19:420
121700ksoftirqd/1121650irq/29-eth0_g0_10:24:541
7602600sleep0121750irq/30-eth0_g0_11:09:360
218512580sleep1121650irq/29-eth0_g0_10:20:241
121580ksoftirqd/1165022sleep009:59:510
121550ksoftirqd/1121750irq/30-eth0_g0_10:33:131
121530ksoftirqd/1121750irq/30-eth0_g0_12:26:491
230762520sleep0121650irq/29-eth0_g0_10:25:240
171402520sleep1121750irq/30-eth0_g0_07:49:531
121510ksoftirqd/1121750irq/30-eth0_g0_11:45:521
121500ksoftirqd/1121750irq/30-eth0_g0_09:54:591
121500ksoftirqd/1121750irq/30-eth0_g0_09:54:591
135682490sleep1121750irq/30-eth0_g0_09:48:441
121750490irq/30-eth0_g0_63832sleep109:19:411
44462480sleep1121750irq/30-eth0_g0_11:24:171
121650470irq/29-eth0_g0_6876-21cyclictest07:09:360
121470ksoftirqd/1121650irq/29-eth0_g0_10:09:261
121750460irq/30-eth0_g0_121ksoftirqd/112:29:471
121750460irq/30-eth0_g0_121ksoftirqd/111:19:351
121650450irq/29-eth0_g0_17923-21latency_hist07:54:360
121450ksoftirqd/1121750irq/30-eth0_g0_12:34:140
121650440irq/29-eth0_g0_6048-21/usr/sbin/munin11:29:490
121650440irq/29-eth0_g0_31ksoftirqd/011:54:350
121650440irq/29-eth0_g0_31ksoftirqd/011:34:460
121440ksoftirqd/1121750irq/30-eth0_g0_11:27:411
121440ksoftirqd/1121750irq/30-eth0_g0_08:14:580
121440ksoftirqd/1121650irq/29-eth0_g0_09:52:351
121440ksoftirqd/1121650irq/29-eth0_g0_07:14:581
121750430irq/30-eth0_g0_121ksoftirqd/111:32:281
121650430irq/29-eth0_g0_209072sleep110:18:411
121430ksoftirqd/1121750irq/30-eth0_g0_12:08:191
121430ksoftirqd/1121650irq/29-eth0_g0_07:09:371
121750420irq/30-eth0_g0_1219-21kworker/1:210:35:451
121750420irq/30-eth0_g0_121ksoftirqd/112:14:561
121650420irq/29-eth0_g0_31ksoftirqd/010:19:480
121650420irq/29-eth0_g0_13-21kworker/0:112:26:250
121420ksoftirqd/1121650irq/29-eth0_g0_12:39:341
117462420chrt121750irq/30-eth0_g0_09:39:550
121750410irq/30-eth0_g0_4752sleep111:06:131
121650410irq/29-eth0_g0_30170-21sendmail_mailqu10:54:570
121650410irq/29-eth0_g0_31ksoftirqd/007:19:480
121650410irq/29-eth0_g0_13233-21df_abs11:59:470
121650410irq/29-eth0_g0_121ksoftirqd/109:29:461
121650410irq/29-eth0_g0_0-21swapper/012:09:530
121410ksoftirqd/1121750irq/30-eth0_g0_11:45:430
121410ksoftirqd/1121650irq/29-eth0_g0_07:10:161
121750400irq/30-eth0_g0_121ksoftirqd/107:24:471
121650400irq/29-eth0_g0_31ksoftirqd/011:09:490
121650400irq/29-eth0_g0_1875-21runrttasks08:47:390
121650400irq/29-eth0_g0_14492-21chrt07:39:490
121650400irq/29-eth0_g0_13-21kworker/0:112:24:160
121650400irq/29-eth0_g0_13-21kworker/0:112:24:160
121650400irq/29-eth0_g0_13-21kworker/0:112:16:500
121650400irq/29-eth0_g0_13-21kworker/0:111:24:590
121650400irq/29-eth0_g0_13-21kworker/0:110:32:320
121650400irq/29-eth0_g0_13-21kworker/0:109:54:050
121650400irq/29-eth0_g0_13-21kworker/0:109:44:420
121650400irq/29-eth0_g0_0-21swapper/008:49:550
121400ksoftirqd/1121750irq/30-eth0_g0_11:20:400
121400ksoftirqd/1121750irq/30-eth0_g0_09:55:170
121400ksoftirqd/1121750irq/30-eth0_g0_09:55:170
121400ksoftirqd/1121750irq/30-eth0_g0_09:29:560
121400ksoftirqd/1121650irq/29-eth0_g0_12:24:071
121400ksoftirqd/1121650irq/29-eth0_g0_12:24:071
121400ksoftirqd/1121650irq/29-eth0_g0_10:43:041
121400ksoftirqd/1121650irq/29-eth0_g0_10:43:041
121400ksoftirqd/1121650irq/29-eth0_g0_08:12:491
6878993934cyclictest23581-21unixbench_singl08:14:581
687899391cyclictest9305-21chrt11:43:511
121750390irq/30-eth0_g0_121ksoftirqd/110:55:241
121750390irq/30-eth0_g0_121ksoftirqd/110:54:361
121650390irq/29-eth0_g0_31ksoftirqd/011:42:510
121650390irq/29-eth0_g0_31ksoftirqd/009:16:050
121650390irq/29-eth0_g0_29086-21unixbench_singl10:49:580
121650390irq/29-eth0_g0_13-21kworker/0:112:39:330
121650390irq/29-eth0_g0_13-21kworker/0:109:29:120
121390ksoftirqd/1121750irq/30-eth0_g0_12:07:490
121390ksoftirqd/1121750irq/30-eth0_g0_11:59:060
121390ksoftirqd/1121750irq/30-eth0_g0_10:35:510
121390ksoftirqd/1121750irq/30-eth0_g0_09:35:280
121390ksoftirqd/1121750irq/30-eth0_g0_09:13:470
121390ksoftirqd/1121750irq/30-eth0_g0_08:58:340
121390ksoftirqd/1121750irq/30-eth0_g0_07:54:490
121390ksoftirqd/1121650irq/29-eth0_g0_09:07:371
121390ksoftirqd/1121650irq/29-eth0_g0_07:42:381
121390ksoftirqd/1121650irq/29-eth0_g0_07:36:311
687899381cyclictest27795-21cat10:44:561
687899381cyclictest18935-21missed_timers10:09:491
121750380irq/30-eth0_g0_1219-21kworker/1:211:03:031
121750380irq/30-eth0_g0_1219-21kworker/1:210:02:041
121750380irq/30-eth0_g0_1219-21kworker/1:209:29:301
121750380irq/30-eth0_g0_0-21swapper/112:14:171
121750380irq/30-eth0_g0_0-21swapper/111:50:371
121650380irq/29-eth0_g0_18858-21iostat10:09:480
121650380irq/29-eth0_g0_1875-21runrttasks09:03:250
121650380irq/29-eth0_g0_1875-21runrttasks09:03:250
121650380irq/29-eth0_g0_1875-21runrttasks08:20:170
121650380irq/29-eth0_g0_13-21kworker/0:111:02:400
121380ksoftirqd/1121750irq/30-eth0_g0_07:36:400
687899372cyclictest5399-21iostat09:14:501
687899372cyclictest20898-21proc_pri08:04:551
687899371cyclictest4593-21grep09:09:581
687899371cyclictest28402-21grep08:34:561
121750370irq/30-eth0_g0_1219-21kworker/1:209:35:231
121750370irq/30-eth0_g0_121ksoftirqd/109:39:431
121750370irq/30-eth0_g0_0-21swapper/111:11:321
121650370irq/29-eth0_g0_8895-21sed07:14:590
121650370irq/29-eth0_g0_1875-21runrttasks10:39:460
121650370irq/29-eth0_g0_1875-21runrttasks10:39:460
121650370irq/29-eth0_g0_1875-21runrttasks09:06:510
121650370irq/29-eth0_g0_13-21kworker/0:111:15:550
121650370irq/29-eth0_g0_0-21swapper/008:34:550
121370ksoftirqd/1121750irq/30-eth0_g0_11:59:481
121370ksoftirqd/1121750irq/30-eth0_g0_07:49:371
687899361cyclictest7697-21grep11:34:571
687899361cyclictest31524-21sed08:49:481
687899361cyclictest30938-21unixbench_singl08:44:571
687899361cyclictest27226-21/usr/sbin/munin08:29:571
687899361cyclictest18542-21sendmail_mailtr07:54:571
121650360irq/29-eth0_g0_7238-21ls07:09:500
121650360irq/29-eth0_g0_25981-21unixbench_multi08:24:570
121650360irq/29-eth0_g0_21054-21unixbench_multi08:04:570
121650360irq/29-eth0_g0_1875-21runrttasks10:46:490
121650360irq/29-eth0_g0_1875-21runrttasks08:09:500
121650360irq/29-eth0_g0_13-21kworker/0:110:16:480
121360ksoftirqd/1121650irq/29-eth0_g0_08:59:521
121360ksoftirqd/1121650irq/29-eth0_g0_08:59:521
687899351cyclictest257052sleep108:24:531
687899351cyclictest19273-21df07:59:481
121650350irq/29-eth0_g0_27227-21unixbench_singl08:29:570
121650350irq/29-eth0_g0_19270-21df07:59:480
121650350irq/29-eth0_g0_0-21swapper/007:24:520
121350ksoftirqd/1121750irq/30-eth0_g0_07:31:040
687899341cyclictest29529-21awk08:39:561
687899341cyclictest105522sleep107:24:371
121650340irq/29-eth0_g0_29283-21latency08:39:510
121650340irq/29-eth0_g0_1875-21runrttasks07:45:520
687899331cyclictest120972sleep107:29:501
121750320irq/30-eth0_g0_0-21swapper/108:57:391
121750310irq/30-eth0_g0_0-21swapper/108:19:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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