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2026-05-28 - 21:28

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 Thu May 28, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121880ksoftirqd/1121750irq/30-eth0_g0_08:41:421
121790ksoftirqd/1121750irq/30-eth0_g0_11:48:171
121610ksoftirqd/184132sleep011:32:010
85582570sleep1121750irq/30-eth0_g0_09:20:061
121560ksoftirqd/1121650irq/29-eth0_g0_10:16:371
121540ksoftirqd/1121750irq/30-eth0_g0_12:15:231
121540ksoftirqd/1121650irq/29-eth0_g0_11:10:000
73822520sleep0121650irq/29-eth0_g0_11:29:170
230212510sleep0121750irq/30-eth0_g0_12:30:540
230212510sleep0121750irq/30-eth0_g0_12:30:540
121510ksoftirqd/1121750irq/30-eth0_g0_09:46:430
121510ksoftirqd/1121750irq/30-eth0_g0_09:46:430
121500ksoftirqd/1121750irq/30-eth0_g0_11:43:531
121500ksoftirqd/1121650irq/29-eth0_g0_09:32:510
200272490sleep1121650irq/29-eth0_g0_10:07:091
121490ksoftirqd/1121650irq/29-eth0_g0_07:19:591
121650480irq/29-eth0_g0_31ksoftirqd/010:24:590
121480ksoftirqd/1121650irq/29-eth0_g0_09:20:580
159122470sleep1121650irq/29-eth0_g0_12:03:441
150602470sleep1121650irq/29-eth0_g0_09:46:221
150602470sleep1121650irq/29-eth0_g0_09:46:221
72902460sleep1121750irq/30-eth0_g0_09:15:051
121650460irq/29-eth0_g0_16000-21mailstats09:50:070
121460ksoftirqd/1121750irq/30-eth0_g0_09:34:241
121460ksoftirqd/1121750irq/30-eth0_g0_07:30:040
121750450irq/30-eth0_g0_121ksoftirqd/109:09:571
121450ksoftirqd/1121650irq/29-eth0_g0_10:48:010
121750440irq/30-eth0_g0_1219-21kworker/1:212:29:201
121750440irq/30-eth0_g0_1219-21kworker/1:210:11:441
121650440irq/29-eth0_g0_7866-21ntp_offset07:05:030
121650440irq/29-eth0_g0_31ksoftirqd/010:16:370
121650440irq/29-eth0_g0_31ksoftirqd/009:10:390
121440ksoftirqd/1121650irq/29-eth0_g0_11:57:061
323462430sleep0121750irq/30-eth0_g0_10:58:080
323462430sleep0121750irq/30-eth0_g0_10:58:080
121750430irq/30-eth0_g0_1219-21kworker/1:211:24:501
121430ksoftirqd/1121650irq/29-eth0_g0_07:19:471
121750420irq/30-eth0_g0_8623-21cyclictest10:55:051
121750420irq/30-eth0_g0_8623-21cyclictest10:55:051
121750420irq/30-eth0_g0_8147-21unixbench_singl07:05:071
121750420irq/30-eth0_g0_60182sleep111:22:381
121750420irq/30-eth0_g0_1219-21kworker/1:209:27:561
121750420irq/30-eth0_g0_121ksoftirqd/109:40:021
121650420irq/29-eth0_g0_5558-21munin-run09:09:470
121650420irq/29-eth0_g0_13-21kworker/0:111:50:010
8625994127cyclictest1964-21runrttasks07:13:441
243152410sleep0121650irq/29-eth0_g0_12:36:440
121750410irq/30-eth0_g0_2126-21lldpd11:02:441
121750410irq/30-eth0_g0_1219-21kworker/1:211:29:581
121650410irq/29-eth0_g0_17205-21sendmail_mailqu09:55:060
121650410irq/29-eth0_g0_13-21kworker/0:112:25:010
121410ksoftirqd/1121750irq/30-eth0_g0_11:20:260
862599401cyclictest3795-21cat09:00:071
862599401cyclictest12515-21sed07:24:581
121750400irq/30-eth0_g0_121ksoftirqd/110:27:501
121750400irq/30-eth0_g0_0-21swapper/111:39:041
121750400irq/30-eth0_g0_0-21swapper/111:13:131
121650400irq/29-eth0_g0_31ksoftirqd/011:15:410
121650400irq/29-eth0_g0_13-21kworker/0:111:00:360
121400ksoftirqd/1121750irq/30-eth0_g0_10:40:240
121400ksoftirqd/1121750irq/30-eth0_g0_09:15:140
121400ksoftirqd/1121650irq/29-eth0_g0_09:59:411
862599392cyclictest25395-21df_inode10:29:591
121750390irq/30-eth0_g0_1219-21kworker/1:212:06:541
121750390irq/30-eth0_g0_1219-21kworker/1:210:41:381
121750390irq/30-eth0_g0_1219-21kworker/1:210:01:181
121650390irq/29-eth0_g0_13-21kworker/0:112:22:590
121650390irq/29-eth0_g0_13-21kworker/0:110:11:040
121650390irq/29-eth0_g0_13-21kworker/0:109:26:270
121650390irq/29-eth0_g0_121ksoftirqd/112:09:510
121650390irq/29-eth0_g0_121ksoftirqd/111:41:550
121390ksoftirqd/1121750irq/30-eth0_g0_11:57:400
121390ksoftirqd/1121750irq/30-eth0_g0_10:51:420
121390ksoftirqd/1121750irq/30-eth0_g0_10:22:530
121390ksoftirqd/1121750irq/30-eth0_g0_09:42:190
121390ksoftirqd/1121750irq/30-eth0_g0_08:20:140
121390ksoftirqd/1121750irq/30-eth0_g0_08:20:140
121390ksoftirqd/1121750irq/30-eth0_g0_07:59:160
121390ksoftirqd/1121750irq/30-eth0_g0_07:37:220
121390ksoftirqd/1121650irq/29-eth0_g0_08:25:381
862599382cyclictest12445-21seq09:35:081
862599381cyclictest5113-21chrt09:05:081
862599381cyclictest19074-21taskset07:50:071
163632380sleep1121750irq/30-eth0_g0_09:52:191
121750380irq/30-eth0_g0_121ksoftirqd/111:49:511
121750380irq/30-eth0_g0_121ksoftirqd/110:48:181
121650380irq/29-eth0_g0_27641-21sort08:25:070
121650380irq/29-eth0_g0_13-21kworker/0:112:05:510
121650380irq/29-eth0_g0_13-21kworker/0:111:59:590
121650380irq/29-eth0_g0_13-21kworker/0:110:29:520
121650380irq/29-eth0_g0_121ksoftirqd/111:05:440
121380ksoftirqd/1121750irq/30-eth0_g0_11:35:390
121380ksoftirqd/1121750irq/30-eth0_g0_09:36:100
121380ksoftirqd/1121750irq/30-eth0_g0_08:56:320
121380ksoftirqd/1121750irq/30-eth0_g0_08:01:090
862599374cyclictest228592sleep110:20:001
862599372cyclictest22739-21awk12:30:041
862599372cyclictest22739-21awk12:30:041
862599372cyclictest1927-21awk11:05:061
249982370sleep0121650irq/29-eth0_g0_08:15:030
121750370irq/30-eth0_g0_5556-21diskmemload10:36:251
121750370irq/30-eth0_g0_1219-21kworker/1:212:12:261
121750370irq/30-eth0_g0_1219-21kworker/1:210:51:081
121650370irq/29-eth0_g0_3723-21rt-features09:00:060
121650370irq/29-eth0_g0_30089-21timerandwakeup08:35:090
121650370irq/29-eth0_g0_24491-21sshd08:14:290
121650370irq/29-eth0_g0_1964-21runrttasks12:15:060
121650370irq/29-eth0_g0_19439-21missed_timers10:05:010
121650370irq/29-eth0_g0_13-21kworker/0:111:48:030
121650370irq/29-eth0_g0_13-21kworker/0:110:39:480
121370ksoftirqd/1121750irq/30-eth0_g0_12:24:001
862599362cyclictest294082sleep108:34:471
862599362cyclictest1964-21runrttasks07:55:351
862599361cyclictest26534-21grep08:20:091
862599361cyclictest26534-21grep08:20:091
862599361cyclictest16183-21df07:39:591
862599361cyclictest0-21swapper/108:58:171
862599361cyclictest0-21swapper/108:01:411
121750360irq/30-eth0_g0_186812sleep010:00:460
121750360irq/30-eth0_g0_1219-21kworker/1:211:16:421
121650360irq/29-eth0_g0_631-21latency_hist08:49:470
121650360irq/29-eth0_g0_28963-21unixbench_singl08:30:080
121650360irq/29-eth0_g0_1964-21runrttasks08:07:170
121650360irq/29-eth0_g0_1396-21unixbench_multi08:50:100
121650360irq/29-eth0_g0_11485-21ls07:20:040
121650360irq/29-eth0_g0_10322-21awk07:15:030
862599351cyclictest1964-21runrttasks07:48:481
862599351cyclictest0-21swapper/112:38:141
862599351cyclictest0-21swapper/108:54:281
121650350irq/29-eth0_g0_8924-21if_eth007:10:000
121650350irq/29-eth0_g0_2093-21snmpd07:27:230
121650350irq/29-eth0_g0_1964-21runrttasks08:39:520
121650350irq/29-eth0_g0_17895-21unixbench_multi07:45:080
121350ksoftirqd/1121650irq/29-eth0_g0_07:30:071
862599341cyclictest30043-21wc08:35:081
862599341cyclictest22411-21cat08:05:011
121750340irq/30-eth0_g0_23921-21sendmail_mailqu08:10:051
121750340irq/30-eth0_g0_14999-21forks07:34:581
121650340irq/29-eth0_g0_17194-21latency_hist07:44:480
862599331cyclictest32207-21latency08:45:031
862599331cyclictest0-21swapper/108:18:101
121650320irq/29-eth0_g0_19026-21find07:50:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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