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2025-11-07 - 10:35

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 Fri Nov 07, 2025 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
280482750sleep1121650irq/30-eth0_g0_21:45:111
54512740sleep0121550irq/29-eth0_g0_22:25:280
320272700sleep1121650irq/30-eth0_g0_00:15:011
121620ksoftirqd/1121550irq/29-eth0_g0_22:48:391
121550ksoftirqd/1121650irq/30-eth0_g0_21:17:141
121540ksoftirqd/1121650irq/30-eth0_g0_21:19:561
49702510sleep0121650irq/30-eth0_g0_00:36:340
121470ksoftirqd/1121650irq/30-eth0_g0_20:24:541
121470ksoftirqd/1121650irq/30-eth0_g0_20:24:541
121470ksoftirqd/1121650irq/30-eth0_g0_00:31:241
121470ksoftirqd/1121550irq/29-eth0_g0_21:34:351
121470ksoftirqd/1121550irq/29-eth0_g0_20:51:581
121470ksoftirqd/1121550irq/29-eth0_g0_20:18:361
121460ksoftirqd/1121650irq/30-eth0_g0_00:03:381
121460ksoftirqd/1121550irq/29-eth0_g0_20:39:381
121460ksoftirqd/1121550irq/29-eth0_g0_00:25:101
121460ksoftirqd/1121550irq/29-eth0_g0_00:25:101
258892450sleep1121550irq/29-eth0_g0_21:38:361
121550450irq/29-eth0_g0_13-21kworker/0:123:39:540
121450ksoftirqd/1121650irq/30-eth0_g0_22:05:321
121450ksoftirqd/1121650irq/30-eth0_g0_00:21:441
121550440irq/29-eth0_g0_18578-21proc_pri23:19:580
121440ksoftirqd/1121550irq/29-eth0_g0_21:40:001
15082430sleep1121650irq/30-eth0_g0_19:59:391
121550430irq/29-eth0_g0_0-21swapper/000:09:560
121430ksoftirqd/1121650irq/30-eth0_g0_23:34:210
121650420irq/30-eth0_g0_121ksoftirqd/123:42:091
121650420irq/30-eth0_g0_121ksoftirqd/123:08:211
121550420irq/29-eth0_g0_257262sleep021:36:420
121550420irq/29-eth0_g0_13-21kworker/0:123:56:370
121550420irq/29-eth0_g0_13-21kworker/0:122:12:070
121420ksoftirqd/1121650irq/30-eth0_g0_22:03:441
121420ksoftirqd/1121550irq/29-eth0_g0_00:04:581
121650410irq/30-eth0_g0_470-21kworker/1:123:32:471
121650410irq/30-eth0_g0_470-21kworker/1:122:09:511
121650410irq/30-eth0_g0_1955-21runrttasks19:08:431
121650410irq/30-eth0_g0_121ksoftirqd/123:16:091
121550410irq/29-eth0_g0_31ksoftirqd/023:02:120
121550410irq/29-eth0_g0_13-21kworker/0:123:06:180
121550410irq/29-eth0_g0_13-21kworker/0:122:34:320
121550410irq/29-eth0_g0_13-21kworker/0:122:34:320
121550410irq/29-eth0_g0_13-21kworker/0:122:00:510
121550410irq/29-eth0_g0_13-21kworker/0:121:56:490
121410ksoftirqd/1121550irq/29-eth0_g0_23:01:261
2162999401cyclictest30297-21awk21:55:001
121650400irq/30-eth0_g0_470-21kworker/1:122:24:231
121550400irq/29-eth0_g0_8879-21find22:39:580
121550400irq/29-eth0_g0_31ksoftirqd/023:34:590
121550400irq/29-eth0_g0_31ksoftirqd/023:34:590
121550400irq/29-eth0_g0_13-21kworker/0:123:15:470
121550400irq/29-eth0_g0_13-21kworker/0:122:52:050
121550400irq/29-eth0_g0_13-21kworker/0:122:23:010
121550400irq/29-eth0_g0_13-21kworker/0:122:17:030
121550400irq/29-eth0_g0_13-21kworker/0:121:44:510
121550400irq/29-eth0_g0_13-21kworker/0:121:15:090
121550400irq/29-eth0_g0_13-21kworker/0:100:22:580
121550400irq/29-eth0_g0_0-21swapper/000:24:580
121550400irq/29-eth0_g0_0-21swapper/000:24:580
121400ksoftirqd/1121650irq/30-eth0_g0_23:10:330
121400ksoftirqd/1121650irq/30-eth0_g0_21:51:450
121400ksoftirqd/1121650irq/30-eth0_g0_21:40:000
121400ksoftirqd/1121650irq/30-eth0_g0_19:26:140
121400ksoftirqd/1121550irq/29-eth0_g0_20:40:061
2162999391cyclictest30228-21latency_hist19:44:391
2162999391cyclictest27088-21ps19:30:021
121650390irq/30-eth0_g0_121ksoftirqd/123:21:101
121550390irq/29-eth0_g0_23479-21find19:14:570
121550390irq/29-eth0_g0_13-21kworker/0:122:55:310
121550390irq/29-eth0_g0_13-21kworker/0:100:19:210
121390ksoftirqd/1121650irq/30-eth0_g0_23:51:280
121390ksoftirqd/1121650irq/30-eth0_g0_23:45:050
121390ksoftirqd/1121650irq/30-eth0_g0_22:45:300
121390ksoftirqd/1121650irq/30-eth0_g0_22:37:170
121390ksoftirqd/1121650irq/30-eth0_g0_21:11:280
121390ksoftirqd/1121650irq/30-eth0_g0_20:54:590
121390ksoftirqd/1121650irq/30-eth0_g0_19:41:440
121390ksoftirqd/1121650irq/30-eth0_g0_19:38:570
121390ksoftirqd/1121650irq/30-eth0_g0_00:05:130
121390ksoftirqd/1121650irq/30-eth0_g0_00:00:580
121390ksoftirqd/1121550irq/29-eth0_g0_23:37:191
121390ksoftirqd/1121550irq/29-eth0_g0_23:37:191
121390ksoftirqd/1121550irq/29-eth0_g0_20:54:391
2162999388cyclictest0-21swapper/122:25:041
2162999381cyclictest30122sleep120:04:561
2162999381cyclictest30122sleep120:04:561
2162999381cyclictest16950-21grep21:00:011
2162999381cyclictest13222-21tail20:45:001
121650380irq/30-eth0_g0_470-21kworker/1:122:50:011
121650380irq/30-eth0_g0_470-21kworker/1:121:53:261
121650380irq/30-eth0_g0_0-21swapper/123:27:331
121550380irq/29-eth0_g0_13-21kworker/0:123:27:460
121550380irq/29-eth0_g0_13-21kworker/0:100:29:510
121550380irq/29-eth0_g0_0-21swapper/019:06:510
121380ksoftirqd/1121550irq/29-eth0_g0_23:50:561
121380ksoftirqd/1121550irq/29-eth0_g0_22:59:141
121380ksoftirqd/1121550irq/29-eth0_g0_21:25:371
121380ksoftirqd/1121550irq/29-eth0_g0_20:30:131
121380ksoftirqd/1121550irq/29-eth0_g0_20:30:131
121380ksoftirqd/1121550irq/29-eth0_g0_20:21:461
121380ksoftirqd/1121550irq/29-eth0_g0_20:04:231
2162999372cyclictest4744-21grep00:35:021
2162999372cyclictest27291-21swap23:55:001
2162999371cyclictest4525-21awk20:09:581
2162999371cyclictest0-21swapper/119:19:371
121650370irq/30-eth0_g0_470-21kworker/1:122:32:361
121650370irq/30-eth0_g0_470-21kworker/1:122:32:361
121650370irq/30-eth0_g0_470-21kworker/1:122:17:051
121650370irq/30-eth0_g0_0-21swapper/100:13:161
121550370irq/29-eth0_g0_23867-21latency21:29:530
121550370irq/29-eth0_g0_2162899cyclictest22:05:260
121550370irq/29-eth0_g0_1955-21runrttasks20:23:450
121550370irq/29-eth0_g0_1955-21runrttasks20:06:410
121550370irq/29-eth0_g0_1955-21runrttasks20:06:410
121550370irq/29-eth0_g0_0-21swapper/021:09:380
121370ksoftirqd/1121550irq/29-eth0_g0_23:10:491
2162999361cyclictest32120-21sort19:50:011
2162999361cyclictest28519-21grep19:35:011
2162999361cyclictest24335-21taskset19:19:521
2162999361cyclictest1955-21runrttasks22:43:411
121550360irq/29-eth0_g0_5233-21/usr/sbin/munin20:14:520
121550360irq/29-eth0_g0_4588-21sort20:09:590
121550360irq/29-eth0_g0_31902-21ntpdc19:49:570
121550360irq/29-eth0_g0_30816-21rt-features19:44:580
121550360irq/29-eth0_g0_1955-21runrttasks20:35:090
121550360irq/29-eth0_g0_13-21kworker/0:121:27:330
121550360irq/29-eth0_g0_13-21kworker/0:121:20:130
121360ksoftirqd/1121650irq/30-eth0_g0_20:31:570
121360ksoftirqd/1121650irq/30-eth0_g0_20:31:570
121360ksoftirqd/1121550irq/29-eth0_g0_22:35:061
2162999351cyclictest30748-21ps19:44:571
2162999351cyclictest25626-21iostat19:24:561
2162999351cyclictest188392sleep121:09:511
121550350irq/29-eth0_g0_1955-21runrttasks20:49:480
121550350irq/29-eth0_g0_1955-21runrttasks20:43:170
121550350irq/29-eth0_g0_1768-21irqstats19:59:530
121550350irq/29-eth0_g0_16325-21df20:59:510
121650340irq/30-eth0_g0_17869-21chrt21:04:541
121550340irq/29-eth0_g0_8343-21tail20:25:010
121550340irq/29-eth0_g0_8343-21tail20:25:010
121550340irq/29-eth0_g0_27027-21chrt19:30:010
121550340irq/29-eth0_g0_24880-21uptime19:20:030
121550340irq/29-eth0_g0_21723-21/usr/sbin/munin19:10:010
121550340irq/29-eth0_g0_13198-21unixbench_multi20:45:000
121550340irq/29-eth0_g0_0-21swapper/019:55:010
121340ksoftirqd/1121550irq/29-eth0_g0_19:09:561
121650330irq/30-eth0_g0_470-21kworker/1:123:48:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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