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2026-09-01 - 12:19

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 Tue Sep 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211060ksoftirqd/1121750irq/30-eth0_g0_23:13:441
276562740sleep0121650irq/29-eth0_g0_23:06:200
121660ksoftirqd/1121750irq/30-eth0_g0_00:21:250
254112650sleep0121650irq/29-eth0_g0_22:57:470
121590ksoftirqd/1121750irq/30-eth0_g0_22:09:031
121570ksoftirqd/1121750irq/30-eth0_g0_22:47:331
121570ksoftirqd/1120512sleep000:19:580
42862500sleep1121750irq/30-eth0_g0_23:45:591
121490ksoftirqd/1121750irq/30-eth0_g0_23:29:471
121480ksoftirqd/1121750irq/30-eth0_g0_23:47:411
121650470irq/29-eth0_g0_31ksoftirqd/019:01:140
121460ksoftirqd/1121650irq/29-eth0_g0_22:59:401
121750450irq/30-eth0_g0_1219-21kworker/1:221:34:321
121650450irq/29-eth0_g0_19085-21grep22:31:210
121450ksoftirqd/1121750irq/30-eth0_g0_21:14:591
121450ksoftirqd/1121650irq/29-eth0_g0_23:21:101
121750440irq/30-eth0_g0_1219-21kworker/1:221:51:221
121650440irq/29-eth0_g0_0-21swapper/020:35:590
121440ksoftirqd/1121650irq/29-eth0_g0_23:19:271
121650430irq/29-eth0_g0_31ksoftirqd/021:30:070
121650430irq/29-eth0_g0_13-21kworker/0:123:45:590
121650430irq/29-eth0_g0_121ksoftirqd/119:55:581
121650430irq/29-eth0_g0_121ksoftirqd/119:55:581
121430ksoftirqd/1121750irq/30-eth0_g0_21:09:440
121430ksoftirqd/1121650irq/29-eth0_g0_23:01:171
121430ksoftirqd/1121650irq/29-eth0_g0_22:23:401
34372420sleep1121750irq/30-eth0_g0_19:16:131
34372420sleep1121750irq/30-eth0_g0_19:16:131
121750420irq/30-eth0_g0_1219-21kworker/1:221:22:461
121750420irq/30-eth0_g0_1219-21kworker/1:200:35:401
121750420irq/30-eth0_g0_1219-21kworker/1:200:16:521
121650420irq/29-eth0_g0_31ksoftirqd/022:11:130
121650420irq/29-eth0_g0_13-21kworker/0:122:06:040
121650420irq/29-eth0_g0_13-21kworker/0:121:42:170
121650420irq/29-eth0_g0_121ksoftirqd/120:46:091
121420ksoftirqd/1121650irq/29-eth0_g0_20:55:461
56999411cyclictest29948-21diskmemload22:28:241
121650410irq/29-eth0_g0_31ksoftirqd/023:36:030
121650410irq/29-eth0_g0_31ksoftirqd/022:26:250
121650410irq/29-eth0_g0_31ksoftirqd/021:54:140
121650410irq/29-eth0_g0_19959-21memory22:36:130
121650410irq/29-eth0_g0_1964-21runrttasks00:09:580
121650410irq/29-eth0_g0_13-21kworker/0:123:30:150
121650410irq/29-eth0_g0_13-21kworker/0:122:49:180
121650410irq/29-eth0_g0_13-21kworker/0:122:24:460
121650410irq/29-eth0_g0_13-21kworker/0:100:01:110
121410ksoftirqd/1121750irq/30-eth0_g0_22:04:000
121410ksoftirqd/1121750irq/30-eth0_g0_21:46:200
121410ksoftirqd/1121750irq/30-eth0_g0_21:46:200
121410ksoftirqd/1121650irq/29-eth0_g0_00:23:471
56999401cyclictest6863-21grep21:41:201
56999401cyclictest686-21grep21:16:201
121750400irq/30-eth0_g0_13-21kworker/0:123:51:110
121750400irq/30-eth0_g0_1219-21kworker/1:222:01:421
121750400irq/30-eth0_g0_1219-21kworker/1:200:08:151
121750400irq/30-eth0_g0_121ksoftirqd/122:34:401
121750400irq/30-eth0_g0_121ksoftirqd/122:16:291
121750400irq/30-eth0_g0_121ksoftirqd/122:16:291
121650400irq/29-eth0_g0_31ksoftirqd/022:16:180
121650400irq/29-eth0_g0_31ksoftirqd/022:16:180
121650400irq/29-eth0_g0_21940-21runrttasks22:45:020
121650400irq/29-eth0_g0_17280-21unixbench_singl20:11:210
121650400irq/29-eth0_g0_13-21kworker/0:123:11:130
121650400irq/29-eth0_g0_13-21kworker/0:121:32:100
121650400irq/29-eth0_g0_13-21kworker/0:121:11:130
121650400irq/29-eth0_g0_121ksoftirqd/121:58:271
121650400irq/29-eth0_g0_0-21swapper/019:06:140
121400ksoftirqd/1121650irq/29-eth0_g0_22:36:121
56999391cyclictest6260-21unixbench_singl19:26:191
121750390irq/30-eth0_g0_121ksoftirqd/100:14:101
121650390irq/29-eth0_g0_31ksoftirqd/023:21:130
121650390irq/29-eth0_g0_29835-21/usr/sbin/munin23:16:140
121650390irq/29-eth0_g0_13-21kworker/0:123:46:500
121650390irq/29-eth0_g0_13-21kworker/0:121:23:000
121650390irq/29-eth0_g0_13-21kworker/0:100:11:360
121650390irq/29-eth0_g0_13-21kworker/0:100:00:490
121650390irq/29-eth0_g0_12324-21sshd19:51:200
121650390irq/29-eth0_g0_12324-21sshd19:51:200
121390ksoftirqd/1121750irq/30-eth0_g0_22:54:540
121390ksoftirqd/1121750irq/30-eth0_g0_21:36:510
121390ksoftirqd/1121750irq/30-eth0_g0_20:25:290
121390ksoftirqd/1121650irq/29-eth0_g0_23:08:011
121390ksoftirqd/1121650irq/29-eth0_g0_20:13:581
121390ksoftirqd/1121650irq/29-eth0_g0_19:06:391
56999381cyclictest3156-21unixbench_multi21:26:211
121750380irq/30-eth0_g0_32588-21head19:01:211
121750380irq/30-eth0_g0_121ksoftirqd/122:14:271
121650380irq/29-eth0_g0_13-21kworker/0:123:31:300
121650380irq/29-eth0_g0_13-21kworker/0:121:59:010
121380ksoftirqd/1121750irq/30-eth0_g0_19:48:380
121380ksoftirqd/1121750irq/30-eth0_g0_19:48:380
121380ksoftirqd/1121650irq/29-eth0_g0_23:56:401
121380ksoftirqd/1121650irq/29-eth0_g0_23:54:471
121380ksoftirqd/1121650irq/29-eth0_g0_23:31:101
121380ksoftirqd/1121650irq/29-eth0_g0_22:54:031
121380ksoftirqd/1121650irq/29-eth0_g0_21:48:311
121380ksoftirqd/1121650irq/29-eth0_g0_21:48:311
121380ksoftirqd/1121650irq/29-eth0_g0_21:07:251
121380ksoftirqd/1121650irq/29-eth0_g0_21:05:401
121380ksoftirqd/1121650irq/29-eth0_g0_20:25:291
121380ksoftirqd/1121650irq/29-eth0_g0_20:06:431
121380ksoftirqd/1121650irq/29-eth0_g0_19:48:381
121380ksoftirqd/1121650irq/29-eth0_g0_19:48:381
121380ksoftirqd/1121650irq/29-eth0_g0_19:38:531
121380ksoftirqd/1121650irq/29-eth0_g0_00:26:081
121380ksoftirqd/1121650irq/29-eth0_g0_00:01:311
56999372cyclictest21540-21grep22:41:201
121750370irq/30-eth0_g0_20653-21cat20:26:151
121750370irq/30-eth0_g0_0-21swapper/123:40:591
121650370irq/29-eth0_g0_56899cyclictest23:01:540
121650370irq/29-eth0_g0_28730-21chrt21:00:590
121650370irq/29-eth0_g0_1964-21runrttasks20:55:260
121650370irq/29-eth0_g0_1964-21runrttasks20:49:100
121650370irq/29-eth0_g0_1964-21runrttasks19:25:260
121650370irq/29-eth0_g0_13458-21/usr/sbin/munin00:26:180
121650370irq/29-eth0_g0_13-21kworker/0:100:31:340
121370ksoftirqd/1121750irq/30-eth0_g0_21:19:160
56999361cyclictest5623-21sed21:36:201
56999361cyclictest241622sleep120:41:141
121650360irq/29-eth0_g0_7984-21sort19:35:590
121650360irq/29-eth0_g0_3681-21sendmail_mailqu19:16:180
121650360irq/29-eth0_g0_3681-21sendmail_mailqu19:16:180
121650360irq/29-eth0_g0_1964-21runrttasks20:38:430
121650360irq/29-eth0_g0_1964-21runrttasks20:20:190
121650360irq/29-eth0_g0_1964-21runrttasks20:05:560
121650360irq/29-eth0_g0_1964-21runrttasks19:42:500
121650360irq/29-eth0_g0_13554-21grep19:56:220
56999351cyclictest4751-21taskset19:21:171
56999351cyclictest22837-21sed20:36:111
56999351cyclictest0-21swapper/120:00:501
121650350irq/29-eth0_g0_2137-21awk19:11:120
121650350irq/29-eth0_g0_20859-21ls20:26:190
121650350irq/29-eth0_g0_0-21swapper/019:36:190
56999341cyclictest23282sleep119:11:171
56999341cyclictest2093-21snmpd19:45:441
121750340irq/30-eth0_g0_17859-21cpu20:16:111
121750340irq/30-eth0_g0_14404-21cat20:01:131
121750340irq/30-eth0_g0_0-21swapper/120:31:201
121650340irq/29-eth0_g0_6242-21unixbench_multi19:26:190
121650340irq/29-eth0_g0_29126-21missed_timers21:01:140
121650340irq/29-eth0_g0_16033-21tail20:06:210
56999331cyclictest7060-21cat19:31:141
121650330irq/29-eth0_g0_28452-21runrttasks20:57:461
121650320irq/29-eth0_g0_23994-21grep20:41:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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