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2026-03-11 - 12:10

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 highest latencies:
System rack3slot5s.osadl.org (updated Wed Mar 11, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121900ksoftirqd/1121750irq/30-eth0_g0_19:05:121
121650590irq/29-eth0_g0_2845799cyclictest22:00:170
121650550irq/29-eth0_g0_2845799cyclictest23:38:590
121650520irq/29-eth0_g0_2845799cyclictest21:15:500
121750510irq/30-eth0_g0_2845799cyclictest22:44:380
121750510irq/30-eth0_g0_2845799cyclictest22:44:380
121650490irq/29-eth0_g0_2845799cyclictest21:55:250
121490ksoftirqd/1121750irq/30-eth0_g0_22:37:451
118752490sleep0121750irq/30-eth0_g0_00:35:500
121750480irq/30-eth0_g0_2845799cyclictest22:59:060
121650480irq/29-eth0_g0_2845799cyclictest22:46:480
121650470irq/29-eth0_g0_2845799cyclictest23:21:210
121650470irq/29-eth0_g0_2845799cyclictest00:17:580
121650470irq/29-eth0_g0_2845799cyclictest00:05:200
121470ksoftirqd/1121750irq/30-eth0_g0_00:07:101
121470ksoftirqd/1121650irq/29-eth0_g0_23:32:560
121470ksoftirqd/1121650irq/29-eth0_g0_00:11:531
121750460irq/30-eth0_g0_2845799cyclictest21:48:380
121650460irq/29-eth0_g0_2845799cyclictest19:26:260
121460ksoftirqd/1121750irq/30-eth0_g0_00:23:411
121750450irq/30-eth0_g0_2845799cyclictest23:52:070
121750450irq/30-eth0_g0_2845799cyclictest23:13:110
121750450irq/30-eth0_g0_2845799cyclictest22:13:570
121650450irq/29-eth0_g0_2845799cyclictest21:35:400
121650450irq/29-eth0_g0_2845799cyclictest21:35:400
121650450irq/29-eth0_g0_2845799cyclictest19:16:090
121450ksoftirqd/1121650irq/29-eth0_g0_00:00:340
121750440irq/30-eth0_g0_2845799cyclictest23:41:300
121650440irq/29-eth0_g0_2845799cyclictest22:29:350
121650440irq/29-eth0_g0_2845799cyclictest22:09:010
121650440irq/29-eth0_g0_2845799cyclictest00:26:350
121650430irq/29-eth0_g0_2845799cyclictest23:00:460
121430ksoftirqd/1121650irq/29-eth0_g0_22:58:151
121750420irq/30-eth0_g0_470-21kworker/1:123:14:281
121750420irq/30-eth0_g0_470-21kworker/1:121:09:571
121750420irq/30-eth0_g0_470-21kworker/1:100:26:151
121650420irq/29-eth0_g0_2845799cyclictest21:21:310
121650420irq/29-eth0_g0_2029-21runrttasks19:08:570
212802410sleep1121650irq/29-eth0_g0_23:04:271
121750410irq/30-eth0_g0_470-21kworker/1:122:17:331
121750410irq/30-eth0_g0_470-21kworker/1:121:56:461
121750410irq/30-eth0_g0_470-21kworker/1:121:31:201
121750410irq/30-eth0_g0_2845799cyclictest00:33:430
121650410irq/29-eth0_g0_2845799cyclictest23:07:540
121410ksoftirqd/1121750irq/30-eth0_g0_00:20:220
121410ksoftirqd/1121650irq/29-eth0_g0_23:26:220
121410ksoftirqd/1121650irq/29-eth0_g0_22:30:050
121750400irq/30-eth0_g0_470-21kworker/1:123:33:181
121750400irq/30-eth0_g0_470-21kworker/1:122:41:251
121750400irq/30-eth0_g0_470-21kworker/1:122:41:251
121750400irq/30-eth0_g0_470-21kworker/1:121:54:381
121750400irq/30-eth0_g0_2845799cyclictest22:50:140
121400ksoftirqd/1121650irq/29-eth0_g0_22:11:581
121400ksoftirqd/1121650irq/29-eth0_g0_21:37:351
121400ksoftirqd/1121650irq/29-eth0_g0_21:37:351
121400ksoftirqd/1121650irq/29-eth0_g0_20:15:461
121400ksoftirqd/1121650irq/29-eth0_g0_19:20:101
121400ksoftirqd/1121650irq/29-eth0_g0_19:10:141
28458993925cyclictest2029-21runrttasks23:59:441
28458993925cyclictest2029-21runrttasks23:46:501
28458993925cyclictest2029-21runrttasks23:46:501
28458993924cyclictest2029-21runrttasks21:45:301
121750390irq/30-eth0_g0_470-21kworker/1:123:36:331
121750390irq/30-eth0_g0_470-21kworker/1:123:15:511
121750390irq/30-eth0_g0_470-21kworker/1:122:21:381
121750390irq/30-eth0_g0_470-21kworker/1:122:05:181
121750390irq/30-eth0_g0_470-21kworker/1:100:38:451
121750390irq/30-eth0_g0_470-21kworker/1:100:04:551
121750390irq/30-eth0_g0_2845799cyclictest23:59:390
121750390irq/30-eth0_g0_2845799cyclictest21:25:400
121390ksoftirqd/1121650irq/29-eth0_g0_20:49:131
121390ksoftirqd/1121650irq/29-eth0_g0_19:59:181
121390ksoftirqd/1121650irq/29-eth0_g0_19:27:151
121390ksoftirqd/1121650irq/29-eth0_g0_19:15:361
121750380irq/30-eth0_g0_470-21kworker/1:123:20:561
121750380irq/30-eth0_g0_470-21kworker/1:122:30:481
121750380irq/30-eth0_g0_470-21kworker/1:121:19:291
121750380irq/30-eth0_g0_470-21kworker/1:100:18:241
121750380irq/30-eth0_g0_2845799cyclictest21:52:330
121750380irq/30-eth0_g0_2029-21runrttasks20:09:131
121650380irq/29-eth0_g0_2845799cyclictest21:44:520
121380ksoftirqd/1121650irq/29-eth0_g0_23:25:421
121380ksoftirqd/1121650irq/29-eth0_g0_21:34:580
121380ksoftirqd/1121650irq/29-eth0_g0_20:34:351
121380ksoftirqd/1121650irq/29-eth0_g0_20:23:121
121380ksoftirqd/1121650irq/29-eth0_g0_19:36:071
323582370sleep0121650irq/29-eth0_g0_23:49:450
323582370sleep0121650irq/29-eth0_g0_23:49:450
121750370irq/30-eth0_g0_470-21kworker/1:122:45:401
121750370irq/30-eth0_g0_470-21kworker/1:122:29:161
121750370irq/30-eth0_g0_470-21kworker/1:121:24:391
121370ksoftirqd/1121650irq/29-eth0_g0_21:43:011
121370ksoftirqd/1121650irq/29-eth0_g0_21:26:221
121370ksoftirqd/1121650irq/29-eth0_g0_20:54:051
121370ksoftirqd/1121650irq/29-eth0_g0_20:29:101
2845899367cyclictest1038-21cpu19:30:071
121750360irq/30-eth0_g0_470-21kworker/1:123:54:221
121750360irq/30-eth0_g0_470-21kworker/1:122:02:531
121750350irq/30-eth0_g0_470-21kworker/1:123:40:171
121750350irq/30-eth0_g0_470-21kworker/1:121:11:211
121750350irq/30-eth0_g0_470-21kworker/1:100:31:581
121750350irq/30-eth0_g0_2029-21runrttasks20:09:581
2845899341cyclictest222572sleep123:06:321
121750340irq/30-eth0_g0_470-21kworker/1:122:51:451
2845899331cyclictest6635-21grep19:50:191
2845899331cyclictest223782sleep120:55:161
2845899331cyclictest2029-21runrttasks20:03:101
2845899331cyclictest186352sleep120:40:171
2845799337cyclictest3499-21/usr/sbin/munin19:40:080
121750330irq/30-eth0_g0_2845799cyclictest22:36:220
121750330irq/30-eth0_g0_23773-21grep21:00:171
121330ksoftirqd/1121750irq/30-eth0_g0_22:16:070
121330ksoftirqd/1121650irq/29-eth0_g0_20:38:031
121320ksoftirqd/1121650irq/29-eth0_g0_19:44:571
2845799319cyclictest121650irq/29-eth0_g0_21:10:190
2845799317cyclictest121650irq/29-eth0_g0_20:32:360
2845799317cyclictest0-21swapper/019:12:530
2845799316cyclictest2029-21runrttasks20:50:290
2845799316cyclictest18696-21ps20:40:170
28457993127cyclictest0-21swapper/020:14:010
28457993113cyclictest15078-21sendmail_mailqu20:25:150
28457993111cyclictest0-21swapper/020:39:350
121750310irq/30-eth0_g0_5864-21/usr/sbin/munin19:49:571
121650310irq/29-eth0_g0_2845799cyclictest19:54:570
2845799304cyclictest2029-21runrttasks19:35:530
28457993012cyclictest0-21swapper/020:24:350
121750300irq/30-eth0_g0_2845799cyclictest23:15:080
121650300irq/29-eth0_g0_2845799cyclictest21:05:110
121650300irq/29-eth0_g0_2845799cyclictest19:21:270
2845799295cyclictest0-21swapper/019:59:430
28457992925cyclictest0-21swapper/020:15:160
28457992910cyclictest121650irq/29-eth0_g0_19:34:570
121750290irq/30-eth0_g0_2845799cyclictest20:55:110
121750290irq/30-eth0_g0_2845799cyclictest00:10:170
121650290irq/29-eth0_g0_2845799cyclictest20:45:180
2845799285cyclictest121650irq/29-eth0_g0_20:07:030
28457992815cyclictest5259-21find19:45:160
28457992813cyclictest23768-21sed21:00:170
121650280irq/29-eth0_g0_2845799cyclictest20:04:570
2845799256cyclictest11051-21grep22:20:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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