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2025-12-14 - 17:22

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 Sun Dec 14, 2025 01:37:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
789521360sleep1121450irq/29-eth0_g0_22:56:131
1211060ksoftirqd/1164212sleep019:05:440
121950ksoftirqd/1121450irq/29-eth0_g0_00:33:151
176672900sleep0121450irq/29-eth0_g0_23:35:590
121880ksoftirqd/1121450irq/29-eth0_g0_23:13:051
121860ksoftirqd/1121450irq/29-eth0_g0_22:37:580
121780ksoftirqd/1121450irq/29-eth0_g0_00:20:401
264342640sleep1121550irq/30-eth0_g0_19:47:371
121580ksoftirqd/1121550irq/30-eth0_g0_23:16:461
121550ksoftirqd/1310882sleep020:05:290
121550ksoftirqd/1121550irq/30-eth0_g0_23:20:571
121540ksoftirqd/1121550irq/30-eth0_g0_21:51:221
121540ksoftirqd/1121550irq/30-eth0_g0_21:51:221
210042530sleep1121550irq/30-eth0_g0_23:47:591
121530ksoftirqd/1121550irq/30-eth0_g0_22:27:271
121520ksoftirqd/1121550irq/30-eth0_g0_23:05:201
121510ksoftirqd/1121450irq/29-eth0_g0_00:38:250
146872500sleep0121550irq/30-eth0_g0_21:11:470
121500ksoftirqd/1121550irq/30-eth0_g0_23:01:201
121450480irq/29-eth0_g0_31ksoftirqd/022:02:430
121450480irq/29-eth0_g0_31ksoftirqd/021:57:420
121480ksoftirqd/1121550irq/30-eth0_g0_21:31:141
69462470sleep1121550irq/30-eth0_g0_20:37:581
121470ksoftirqd/1121550irq/30-eth0_g0_21:40:321
121550460irq/30-eth0_g0_14454-21diskmemload23:30:071
121460ksoftirqd/1121550irq/30-eth0_g0_22:12:091
121460ksoftirqd/1121550irq/30-eth0_g0_21:48:131
121460ksoftirqd/1121550irq/30-eth0_g0_21:21:061
121450ksoftirqd/1121550irq/30-eth0_g0_22:39:251
121450430irq/29-eth0_g0_31ksoftirqd/021:37:420
121430ksoftirqd/1121550irq/30-eth0_g0_22:42:591
121430ksoftirqd/1121550irq/30-eth0_g0_22:42:591
102812430sleep0121450irq/29-eth0_g0_23:05:320
121550420irq/30-eth0_g0_1221-21kworker/1:200:17:391
121550420irq/30-eth0_g0_121ksoftirqd/122:50:111
121550420irq/30-eth0_g0_121ksoftirqd/121:12:591
121450420irq/29-eth0_g0_31ksoftirqd/021:33:040
121450420irq/29-eth0_g0_275452sleep000:16:580
121450420irq/29-eth0_g0_13-21kworker/0:123:11:350
121420ksoftirqd/1121450irq/29-eth0_g0_21:39:051
247872410sleep1121450irq/29-eth0_g0_00:04:141
121550410irq/30-eth0_g0_18445-21unixbench_multi23:37:461
121550410irq/30-eth0_g0_1221-21kworker/1:221:18:431
121450410irq/29-eth0_g0_31ksoftirqd/000:22:470
121450410irq/29-eth0_g0_13-21kworker/0:122:51:180
121410ksoftirqd/1121550irq/30-eth0_g0_23:53:210
121410ksoftirqd/1121450irq/29-eth0_g0_22:32:310
121410ksoftirqd/1121450irq/29-eth0_g0_00:26:541
121550400irq/30-eth0_g0_121ksoftirqd/100:38:351
121550400irq/30-eth0_g0_0-21swapper/122:30:481
121450400irq/29-eth0_g0_13-21kworker/0:123:47:370
121450400irq/29-eth0_g0_13-21kworker/0:123:26:090
121450400irq/29-eth0_g0_13-21kworker/0:122:06:480
121450400irq/29-eth0_g0_13-21kworker/0:100:07:300
121450400irq/29-eth0_g0_0-21swapper/000:30:140
121400ksoftirqd/1121550irq/30-eth0_g0_21:50:520
121400ksoftirqd/1121550irq/30-eth0_g0_21:50:520
121400ksoftirqd/1121550irq/30-eth0_g0_21:47:040
121400ksoftirqd/1121550irq/30-eth0_g0_21:41:420
121550390irq/30-eth0_g0_1221-21kworker/1:223:43:341
121550390irq/30-eth0_g0_1221-21kworker/1:223:27:051
121550390irq/30-eth0_g0_121ksoftirqd/122:07:451
121550390irq/30-eth0_g0_121ksoftirqd/100:09:181
121450390irq/29-eth0_g0_13-21kworker/0:123:22:010
121450390irq/29-eth0_g0_13-21kworker/0:122:48:000
121450390irq/29-eth0_g0_13-21kworker/0:122:13:360
121450390irq/29-eth0_g0_13-21kworker/0:121:26:390
121450390irq/29-eth0_g0_13-21kworker/0:100:14:060
121450390irq/29-eth0_g0_13-21kworker/0:100:01:580
121450390irq/29-eth0_g0_121ksoftirqd/123:17:170
121450390irq/29-eth0_g0_0-21swapper/020:52:410
121390ksoftirqd/1121450irq/29-eth0_g0_20:13:161
1752199382cyclictest32526-21tail22:22:481
1752199381cyclictest29358-21sendmail_mailqu19:57:451
1752199381cyclictest26135-21netstat21:57:411
1752199381cyclictest22039-21sendmail_mailtr19:27:481
1752199381cyclictest19571-21sendmail_mailqu19:17:441
121550380irq/30-eth0_g0_1221-21kworker/1:222:18:351
121550380irq/30-eth0_g0_1221-21kworker/1:222:18:351
121550380irq/30-eth0_g0_1221-21kworker/1:222:00:011
121550380irq/30-eth0_g0_1221-21kworker/1:200:14:311
121550380irq/30-eth0_g0_121ksoftirqd/122:46:571
121550380irq/30-eth0_g0_0-21swapper/123:51:301
121450380irq/29-eth0_g0_6826-21sed20:37:460
121450380irq/29-eth0_g0_23348-21chrt19:32:460
121450380irq/29-eth0_g0_23348-21chrt19:32:460
121450380irq/29-eth0_g0_1941-21runrttasks19:20:140
121450380irq/29-eth0_g0_14465-21latency_hist21:09:590
121450380irq/29-eth0_g0_13-21kworker/0:123:30:510
121450380irq/29-eth0_g0_13-21kworker/0:122:42:140
121450380irq/29-eth0_g0_13-21kworker/0:122:42:140
121450380irq/29-eth0_g0_13-21kworker/0:121:16:200
121450380irq/29-eth0_g0_13-21kworker/0:100:25:540
1752199372cyclictest3219-21unixbench_singl20:22:471
1752199371cyclictest31644-21awk20:07:401
1752199371cyclictest25853-21grep19:42:501
1752199371cyclictest1922-21grep20:17:471
1752199371cyclictest19105-21head21:27:481
1752199371cyclictest12373-21/usr/sbin/munin21:02:381
1752199371cyclictest11725-21unixbench_multi20:57:471
121550370irq/30-eth0_g0_16795-21chrt19:07:371
121450370irq/29-eth0_g0_29342-21chrt19:57:450
121450370irq/29-eth0_g0_1941-21runrttasks20:00:520
121450370irq/29-eth0_g0_1941-21runrttasks19:15:260
121450370irq/29-eth0_g0_18280-21ps19:12:450
121450370irq/29-eth0_g0_13-21kworker/0:123:43:460
121450370irq/29-eth0_g0_13-21kworker/0:123:04:250
121450370irq/29-eth0_g0_13-21kworker/0:122:26:260
121450370irq/29-eth0_g0_13-21kworker/0:122:19:560
121450370irq/29-eth0_g0_13-21kworker/0:122:19:560
121450370irq/29-eth0_g0_12842-21find21:02:460
121370ksoftirqd/1121450irq/29-eth0_g0_23:57:351
121370ksoftirqd/1121450irq/29-eth0_g0_23:57:351
1752199361cyclictest4139-21/usr/sbin/munin20:27:401
121450360irq/29-eth0_g0_8349-21latency_hist20:44:590
121450360irq/29-eth0_g0_5375-21/usr/sbin/munin20:32:420
121450360irq/29-eth0_g0_32543-21unixbench_multi22:22:480
121450360irq/29-eth0_g0_22413-21latency_hist19:29:580
121450360irq/29-eth0_g0_1941-21runrttasks23:58:290
121450360irq/29-eth0_g0_1941-21runrttasks23:58:290
121450360irq/29-eth0_g0_1941-21runrttasks20:25:170
121450360irq/29-eth0_g0_1941-21runrttasks20:23:340
121450360irq/29-eth0_g0_13-21kworker/0:122:59:440
121450360irq/29-eth0_g0_0-21swapper/019:36:250
1752199352cyclictest206202sleep119:22:391
1752199351cyclictest4750-21date20:29:591
1752199351cyclictest28061-21ps19:52:441
1752199351cyclictest23373-21grep19:32:471
1752199351cyclictest23373-21grep19:32:471
1752199351cyclictest18469-21unixbench_multi19:12:481
121550350irq/30-eth0_g0_0-21swapper/120:42:401
121450350irq/29-eth0_g0_1941-21runrttasks21:20:520
1752199341cyclictest98082sleep120:51:561
1752199341cyclictest91972sleep120:47:451
1752199341cyclictest30779-21vmstat20:02:491
1752199341cyclictest24624-21head19:37:451
121450340irq/29-eth0_g0_9162-21awk20:47:440
121450340irq/29-eth0_g0_26227-21taskset19:45:510
121450340irq/29-eth0_g0_1941-21runrttasks19:54:170
121450340irq/29-eth0_g0_1941-21runrttasks19:43:250
121450340irq/29-eth0_g0_1281-21/usr/sbin/munin20:17:470
121450340irq/29-eth0_g0_0-21swapper/020:57:380
121550330irq/30-eth0_g0_13905-21ntpdc21:07:401
121450330irq/29-eth0_g0_618-21taskset20:12:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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