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2026-09-15 - 02:11

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 Tue Sep 15, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284002730sleep1121650irq/29-eth0_g0_21:20:011
121570ksoftirqd/1121750irq/30-eth0_g0_22:22:561
121550ksoftirqd/1121750irq/30-eth0_g0_21:24:181
73862530sleep0121750irq/30-eth0_g0_00:16:400
121510ksoftirqd/1121750irq/30-eth0_g0_22:07:491
101592500sleep1121750irq/30-eth0_g0_00:30:261
165372490sleep1121650irq/29-eth0_g0_22:41:571
15332490sleep1121650irq/29-eth0_g0_23:55:031
121650490irq/29-eth0_g0_31ksoftirqd/022:18:530
121480ksoftirqd/1121750irq/30-eth0_g0_22:39:221
121650470irq/29-eth0_g0_121ksoftirqd/121:55:481
121470ksoftirqd/1121750irq/30-eth0_g0_00:00:161
121460ksoftirqd/1121650irq/29-eth0_g0_22:28:531
121750450irq/30-eth0_g0_1219-21kworker/1:223:18:301
121650450irq/29-eth0_g0_31ksoftirqd/000:25:070
121450ksoftirqd/1121650irq/29-eth0_g0_19:51:251
121450ksoftirqd/1121650irq/29-eth0_g0_19:12:551
121650440irq/29-eth0_g0_121ksoftirqd/121:35:460
121650440irq/29-eth0_g0_121ksoftirqd/100:13:510
121440ksoftirqd/1121650irq/29-eth0_g0_20:46:001
121440ksoftirqd/1121650irq/29-eth0_g0_19:58:421
121650430irq/29-eth0_g0_31ksoftirqd/023:46:050
121650430irq/29-eth0_g0_31ksoftirqd/023:46:050
121650430irq/29-eth0_g0_1964-21runrttasks20:46:070
121650430irq/29-eth0_g0_1964-21runrttasks19:05:010
121650430irq/29-eth0_g0_13-21kworker/0:123:13:060
121430ksoftirqd/1121650irq/29-eth0_g0_20:41:401
121650420irq/29-eth0_g0_131kworker/0:123:17:140
121650420irq/29-eth0_g0_13-21kworker/0:122:48:150
121420ksoftirqd/1121750irq/30-eth0_g0_22:54:031
121420ksoftirqd/1121650irq/29-eth0_g0_23:47:571
121420ksoftirqd/1121650irq/29-eth0_g0_23:47:571
121750410irq/30-eth0_g0_31ksoftirqd/019:20:450
121650410irq/29-eth0_g0_31ksoftirqd/022:38:560
121650410irq/29-eth0_g0_13-21kworker/0:123:52:400
121650410irq/29-eth0_g0_13-21kworker/0:122:45:180
121650410irq/29-eth0_g0_13-21kworker/0:122:27:360
121650410irq/29-eth0_g0_13-21kworker/0:121:23:150
121650410irq/29-eth0_g0_13-21kworker/0:121:16:500
121650410irq/29-eth0_g0_13-21kworker/0:100:33:370
121650410irq/29-eth0_g0_13-21kworker/0:100:06:280
121410ksoftirqd/1121750irq/30-eth0_g0_21:10:470
121410ksoftirqd/1121650irq/29-eth0_g0_00:04:361
121650400irq/29-eth0_g0_31ksoftirqd/023:21:170
121650400irq/29-eth0_g0_31ksoftirqd/021:28:190
121650400irq/29-eth0_g0_13-21kworker/0:123:57:290
121650400irq/29-eth0_g0_13-21kworker/0:123:31:130
121650400irq/29-eth0_g0_13-21kworker/0:123:09:500
121650400irq/29-eth0_g0_13-21kworker/0:122:54:020
121650400irq/29-eth0_g0_13-21kworker/0:122:31:280
121650400irq/29-eth0_g0_13-21kworker/0:122:23:240
121650400irq/29-eth0_g0_13-21kworker/0:122:11:530
121650400irq/29-eth0_g0_13-21kworker/0:121:57:210
121650400irq/29-eth0_g0_13-21kworker/0:121:50:220
121650400irq/29-eth0_g0_13-21kworker/0:100:28:190
121650400irq/29-eth0_g0_1040-21taskset21:40:370
121650400irq/29-eth0_g0_1040-21taskset21:40:370
121400ksoftirqd/1121650irq/29-eth0_g0_23:45:161
121400ksoftirqd/1121650irq/29-eth0_g0_20:20:411
121750390irq/30-eth0_g0_1219-21kworker/1:221:26:131
121750390irq/30-eth0_g0_1219-21kworker/1:200:33:341
121650390irq/29-eth0_g0_31ksoftirqd/023:04:160
121650390irq/29-eth0_g0_1964-21runrttasks22:07:440
121650390irq/29-eth0_g0_13-21kworker/0:123:45:180
121650390irq/29-eth0_g0_13-21kworker/0:121:08:120
121650390irq/29-eth0_g0_13-21kworker/0:100:01:300
121650390irq/29-eth0_g0_121ksoftirqd/122:02:500
121390ksoftirqd/1121650irq/29-eth0_g0_22:20:061
121390ksoftirqd/1121650irq/29-eth0_g0_20:14:551
121390ksoftirqd/1121650irq/29-eth0_g0_19:35:481
73572380sleep1121650irq/29-eth0_g0_00:16:191
121750380irq/30-eth0_g0_26347-21taskset23:21:581
121750380irq/30-eth0_g0_1219-21kworker/1:223:01:381
121650380irq/29-eth0_g0_19899-21processes22:55:450
121650380irq/29-eth0_g0_19899-21processes22:55:450
121650380irq/29-eth0_g0_1964-21runrttasks19:57:590
121650380irq/29-eth0_g0_1964-21runrttasks19:51:360
121650380irq/29-eth0_g0_13-21kworker/0:121:51:090
121380ksoftirqd/127439-21runrttasks19:01:541
121380ksoftirqd/1121650irq/29-eth0_g0_22:56:291
121380ksoftirqd/1121650irq/29-eth0_g0_22:56:291
121380ksoftirqd/1121650irq/29-eth0_g0_21:41:351
121380ksoftirqd/1121650irq/29-eth0_g0_21:41:351
121750370irq/30-eth0_g0_1219-21kworker/1:223:27:041
121750370irq/30-eth0_g0_1219-21kworker/1:221:11:141
121750370irq/30-eth0_g0_1219-21kworker/1:200:10:561
121750370irq/30-eth0_g0_10680-21sendmail_mailqu20:05:471
121650370irq/29-eth0_g0_4257-21sort19:40:400
121650370irq/29-eth0_g0_1964-21runrttasks19:36:000
121650370irq/29-eth0_g0_16811-21sendmail_mailst20:30:470
121650370irq/29-eth0_g0_15667-21grep20:25:480
121650370irq/29-eth0_g0_13-21kworker/0:123:26:290
121650370irq/29-eth0_g0_0-21swapper/020:20:410
121370ksoftirqd/1121650irq/29-eth0_g0_22:15:261
121750360irq/30-eth0_g0_4115-21unixbench_multi21:50:471
121750360irq/30-eth0_g0_13-21kworker/0:121:33:470
121750360irq/30-eth0_g0_1219-21kworker/1:223:34:151
121750360irq/30-eth0_g0_1219-21kworker/1:223:08:041
121750360irq/30-eth0_g0_1219-21kworker/1:222:00:401
121750360irq/30-eth0_g0_1219-21kworker/1:221:31:161
121750360irq/30-eth0_g0_0-21swapper/121:48:511
121750360irq/30-eth0_g0_0-21swapper/100:22:081
121650360irq/29-eth0_g0_1964-21runrttasks20:37:200
121650360irq/29-eth0_g0_1964-21runrttasks20:14:500
121650360irq/29-eth0_g0_13-21kworker/0:123:37:370
121650360irq/29-eth0_g0_10820-21grep20:05:480
121650360irq/29-eth0_g0_0-21swapper/019:15:420
121360ksoftirqd/1121650irq/29-eth0_g0_22:32:481
121360ksoftirqd/1121650irq/29-eth0_g0_19:46:311
121360ksoftirqd/1121650irq/29-eth0_g0_19:05:461
121360ksoftirqd/1121650irq/29-eth0_g0_19:05:461
121750350irq/30-eth0_g0_9585-21unixbench_singl20:00:481
121750350irq/30-eth0_g0_29647-21proc_pri23:35:441
121750350irq/30-eth0_g0_1964-21runrttasks19:29:070
121750350irq/30-eth0_g0_16894-21tail20:30:481
121750350irq/30-eth0_g0_1446-21munin-run19:30:261
121750350irq/30-eth0_g0_1219-21kworker/1:222:49:471
121650350irq/29-eth0_g0_1964-21runrttasks20:45:040
121650350irq/29-eth0_g0_1964-21runrttasks20:04:380
121650350irq/29-eth0_g0_1964-21runrttasks19:07:240
121650350irq/29-eth0_g0_1964-21runrttasks19:07:240
121650350irq/29-eth0_g0_13210-21grep20:15:460
121350ksoftirqd/1121650irq/29-eth0_g0_23:12:401
121750340irq/30-eth0_g0_4766-21unixbench_multi00:05:481
121750340irq/30-eth0_g0_4159-21df_inode19:40:381
121750340irq/30-eth0_g0_0-21swapper/120:55:421
121750340irq/30-eth0_g0_0-21swapper/120:52:321
121650340irq/29-eth0_g0_5790-21swap19:45:460
121650340irq/29-eth0_g0_1964-21runrttasks19:15:150
121650340irq/29-eth0_g0_0-21swapper/020:50:420
121750330irq/30-eth0_g0_1219-21kworker/1:221:10:191
121750330irq/30-eth0_g0_0-21swapper/121:36:311
121650330irq/29-eth0_g0_2249-21grep19:30:460
121650330irq/29-eth0_g0_1964-21runrttasks21:00:370
121330ksoftirqd/131235-21taskset19:18:081
239042320sleep123905-21/usr/sbin/munin21:00:401
121750320irq/30-eth0_g0_0-21swapper/120:29:541
121750320irq/30-eth0_g0_0-21swapper/120:16:301
121650320irq/29-eth0_g0_2109-21lldpd20:59:210
2775799311cyclictest0-21swapper/119:30:361
121750310irq/30-eth0_g0_18044-21which20:35:481
2775799302cyclictest31509-21runrttasks19:20:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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