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2026-08-10 - 03:32

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Mon Aug 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2620421670sleep1121650irq/29-eth0_g0_23:32:451
2744221220sleep1121650irq/29-eth0_g0_23:37:571
2883021170sleep0121650irq/29-eth0_g0_23:44:510
2370521120sleep1121650irq/29-eth0_g0_21:12:051
2370521120sleep1121650irq/29-eth0_g0_21:12:051
121850ksoftirqd/1121650irq/29-eth0_g0_22:24:540
272262710sleep0121750irq/30-eth0_g0_21:26:590
121670ksoftirqd/1121650irq/29-eth0_g0_22:08:481
121650ksoftirqd/1309592chrt21:42:030
12352630sleep1121750irq/30-eth0_g0_21:52:051
121620ksoftirqd/1121750irq/30-eth0_g0_21:52:060
217722560sleep1121750irq/30-eth0_g0_21:02:121
213942550chrt121750irq/30-eth0_g0_23:13:550
272302540sleep1121750irq/30-eth0_g0_21:27:021
299332520sleep0121750irq/30-eth0_g0_23:48:280
121650500irq/29-eth0_g0_31ksoftirqd/022:12:020
121500ksoftirqd/1121750irq/30-eth0_g0_23:23:090
121490ksoftirqd/1121750irq/30-eth0_g0_23:30:461
121470ksoftirqd/1121750irq/30-eth0_g0_22:43:411
121470ksoftirqd/1121750irq/30-eth0_g0_00:02:191
244562460sleep0121650irq/29-eth0_g0_21:14:160
244562460sleep0121650irq/29-eth0_g0_21:14:160
121460ksoftirqd/1121750irq/30-eth0_g0_00:13:481
121750450irq/30-eth0_g0_1219-21kworker/1:223:08:381
121450ksoftirqd/1121750irq/30-eth0_g0_22:13:391
121650440irq/29-eth0_g0_5766-21processes00:22:140
121440ksoftirqd/1121750irq/30-eth0_g0_22:31:411
121440ksoftirqd/1121750irq/30-eth0_g0_22:22:041
121750430irq/30-eth0_g0_1219-21kworker/1:222:33:081
121750430irq/30-eth0_g0_1219-21kworker/1:221:47:581
121650430irq/29-eth0_g0_24197-21df_abs19:02:030
121430ksoftirqd/1121650irq/29-eth0_g0_19:07:051
25273994227cyclictest1964-21runrttasks23:55:341
121420ksoftirqd/1121650irq/29-eth0_g0_23:00:070
121750410irq/30-eth0_g0_1219-21kworker/1:200:33:551
121650410irq/29-eth0_g0_31ksoftirqd/000:19:570
121650410irq/29-eth0_g0_21738-21/usr/sbin/munin23:17:040
121650410irq/29-eth0_g0_121ksoftirqd/121:42:111
121410ksoftirqd/1121750irq/30-eth0_g0_21:17:080
121650400irq/29-eth0_g0_9402-21find20:12:110
121650400irq/29-eth0_g0_9402-21find20:12:110
121650400irq/29-eth0_g0_31ksoftirqd/023:28:100
121650400irq/29-eth0_g0_31ksoftirqd/021:23:110
121650400irq/29-eth0_g0_31ksoftirqd/019:42:130
121650400irq/29-eth0_g0_13068-21sendmail_mailqu20:27:100
121650400irq/29-eth0_g0_13-21kworker/0:123:32:540
121650400irq/29-eth0_g0_13-21kworker/0:122:00:580
121650400irq/29-eth0_g0_13-21kworker/0:122:00:580
121650400irq/29-eth0_g0_13-21kworker/0:100:16:410
121650400irq/29-eth0_g0_13-21kworker/0:100:03:510
121400ksoftirqd/1121750irq/30-eth0_g0_22:45:430
121400ksoftirqd/1121750irq/30-eth0_g0_22:06:240
121400ksoftirqd/1121750irq/30-eth0_g0_21:34:390
121400ksoftirqd/1121650irq/29-eth0_g0_22:21:261
292152390chrt121750irq/30-eth0_g0_21:32:331
121750390irq/30-eth0_g0_12689-21chrt22:37:191
121750390irq/30-eth0_g0_12689-21chrt22:37:191
121750390irq/30-eth0_g0_1219-21kworker/1:223:46:271
121750390irq/30-eth0_g0_1219-21kworker/1:200:08:081
121750390irq/30-eth0_g0_121ksoftirqd/100:27:411
121650390irq/29-eth0_g0_3426-21unixbench_singl19:47:140
121650390irq/29-eth0_g0_28203-21ntpdc19:17:090
121650390irq/29-eth0_g0_13-21kworker/0:123:57:430
121650390irq/29-eth0_g0_13-21kworker/0:122:47:560
121650390irq/29-eth0_g0_13-21kworker/0:121:08:260
121650390irq/29-eth0_g0_13-21kworker/0:100:27:040
121390ksoftirqd/1121750irq/30-eth0_g0_21:03:350
121390ksoftirqd/1121750irq/30-eth0_g0_19:55:030
121390ksoftirqd/1121650irq/29-eth0_g0_20:07:541
121750380irq/30-eth0_g0_1219-21kworker/1:223:22:211
121750380irq/30-eth0_g0_1219-21kworker/1:223:18:411
121750380irq/30-eth0_g0_1219-21kworker/1:223:06:461
121750380irq/30-eth0_g0_1219-21kworker/1:200:21:351
121750380irq/30-eth0_g0_121ksoftirqd/122:51:161
121750380irq/30-eth0_g0_121ksoftirqd/121:08:181
121750380irq/30-eth0_g0_0-21swapper/121:22:231
121650380irq/29-eth0_g0_31ksoftirqd/020:32:090
121650380irq/29-eth0_g0_15617-21/usr/sbin/munin22:52:020
121650380irq/29-eth0_g0_13-21kworker/0:123:39:280
121650380irq/29-eth0_g0_13-21kworker/0:123:08:160
121650380irq/29-eth0_g0_13-21kworker/0:122:34:520
121650380irq/29-eth0_g0_13-21kworker/0:122:29:050
121650380irq/29-eth0_g0_13-21kworker/0:122:21:040
121650380irq/29-eth0_g0_13-21kworker/0:121:48:130
121380ksoftirqd/1121750irq/30-eth0_g0_20:42:460
2527399372cyclictest4218-21cat19:52:081
2527399372cyclictest30935-21head19:27:121
2527399372cyclictest19248-21cat20:52:151
2527399371cyclictest31869-21awk19:32:111
2527399371cyclictest29810-21df_abs21:37:041
2527399371cyclictest28489-21head19:17:141
2527399371cyclictest25070-21cat21:17:071
2527399371cyclictest19872-21/usr/sbin/munin20:57:021
2527399371cyclictest0-21swapper/100:00:321
121750370irq/30-eth0_g0_1219-21kworker/1:222:00:351
121750370irq/30-eth0_g0_1219-21kworker/1:222:00:351
121750370irq/30-eth0_g0_121ksoftirqd/122:57:511
121750370irq/30-eth0_g0_0-21swapper/123:48:131
121750370irq/30-eth0_g0_0-21swapper/122:52:221
121650370irq/29-eth0_g0_31760-21cat19:32:090
121650370irq/29-eth0_g0_30209-21sendmail_mailqu21:37:130
121650370irq/29-eth0_g0_31ksoftirqd/000:36:050
121650370irq/29-eth0_g0_29575-21sendmail_mailqu19:22:110
121650370irq/29-eth0_g0_25271-21cyclictest23:51:580
121650370irq/29-eth0_g0_18064-21unixbench_multi20:47:110
121650370irq/29-eth0_g0_13-21kworker/0:122:40:520
121650370irq/29-eth0_g0_13-21kworker/0:122:40:520
121650370irq/29-eth0_g0_13-21kworker/0:100:07:360
121650370irq/29-eth0_g0_121ksoftirqd/122:03:021
121370ksoftirqd/124319-21/usr/sbin/munin19:02:051
2527399362cyclictest9997-21munin-run20:16:511
2527399362cyclictest9997-21munin-run20:16:511
2527399361cyclictest632-21netstat19:37:091
2527399361cyclictest58832sleep100:22:161
2527399361cyclictest3442-21grep19:47:141
2527399361cyclictest26920-21sort19:12:081
2527399361cyclictest12807-21sort20:27:061
121650360irq/29-eth0_g0_836-21chrt19:37:140
121650360irq/29-eth0_g0_4845-21taskset22:07:050
121650360irq/29-eth0_g0_1964-21runrttasks20:54:020
121650360irq/29-eth0_g0_1964-21runrttasks19:13:440
121650360irq/29-eth0_g0_13-21kworker/0:123:04:120
121650360irq/29-eth0_g0_11948-21unixbench_multi20:22:130
121360ksoftirqd/1121650irq/29-eth0_g0_20:33:101
2527399351cyclictest6884-21ps20:02:111
2527399351cyclictest2100-21cat19:42:121
2527399351cyclictest10861-21sshd20:17:391
2527399351cyclictest10861-21sshd20:17:391
2527399351cyclictest0-21swapper/123:15:211
121650350irq/29-eth0_g0_6491-21df_abs20:02:040
121650350irq/29-eth0_g0_1964-21runrttasks20:41:100
2527399341cyclictest29168-21chrt19:22:031
2527399340cyclictest0-21swapper/119:59:171
121650340irq/29-eth0_g0_8171-21ps20:07:150
121650340irq/29-eth0_g0_26074-21/usr/sbin/munin19:07:120
121650340irq/29-eth0_g0_1964-21runrttasks20:18:200
121650340irq/29-eth0_g0_1964-21runrttasks20:18:200
121650340irq/29-eth0_g0_0-21swapper/020:57:110
2527399331cyclictest0-21swapper/120:25:381
121750330irq/30-eth0_g0_16904-21grep20:42:131
121750330irq/30-eth0_g0_0-21swapper/120:51:511
121650330irq/29-eth0_g0_5744-21sendmail_mailqu19:57:190
121650330irq/29-eth0_g0_30936-21sed19:27:120
25273993221cyclictest15232-21latency20:37:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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