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2026-06-05 - 00:09

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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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 50 highest latencies:
System rack3slot5s.osadl.org (updated Thu Jun 04, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2331221320sleep0121750irq/30-eth0_g0_10:50:530
2331221320sleep0121750irq/30-eth0_g0_10:50:530
2598121250sleep0121750irq/30-eth0_g0_11:03:250
1211100ksoftirqd/1121750irq/30-eth0_g0_10:07:291
1211010ksoftirqd/1121750irq/30-eth0_g0_11:44:540
237032570chrt121750irq/30-eth0_g0_10:54:321
121560ksoftirqd/1121750irq/30-eth0_g0_08:50:111
8682530sleep0121650irq/29-eth0_g0_11:33:170
121530ksoftirqd/1121750irq/30-eth0_g0_11:07:331
113162530sleep0121650irq/29-eth0_g0_10:03:410
113162530sleep0121650irq/29-eth0_g0_10:03:410
121510ksoftirqd/1121650irq/29-eth0_g0_09:36:350
121500ksoftirqd/1121750irq/30-eth0_g0_11:26:371
197352480sleep0121650irq/29-eth0_g0_10:36:580
130792480sleep1121750irq/30-eth0_g0_10:09:461
121480ksoftirqd/1121750irq/30-eth0_g0_10:18:001
121480ksoftirqd/1121750irq/30-eth0_g0_09:59:141
121750470irq/30-eth0_g0_1219-21kworker/1:210:19:551
121470ksoftirqd/1121650irq/29-eth0_g0_11:56:050
121470ksoftirqd/1121650irq/29-eth0_g0_11:56:050
121470ksoftirqd/1121650irq/29-eth0_g0_09:38:141
130542460sleep0121650irq/29-eth0_g0_12:22:020
121450ksoftirqd/1121750irq/30-eth0_g0_12:28:100
121450ksoftirqd/1121750irq/30-eth0_g0_10:45:430
121450ksoftirqd/1121750irq/30-eth0_g0_10:27:361
121450ksoftirqd/1121750irq/30-eth0_g0_09:48:051
82492440sleep1121750irq/30-eth0_g0_12:03:081
121440ksoftirqd/1121750irq/30-eth0_g0_12:16:250
183342430sleep0121650irq/29-eth0_g0_10:29:540
121750430irq/30-eth0_g0_1219-21kworker/1:211:17:131
121430ksoftirqd/1121650irq/29-eth0_g0_12:26:581
121430ksoftirqd/1121650irq/29-eth0_g0_11:22:511
121430ksoftirqd/1121650irq/29-eth0_g0_11:22:511
121430ksoftirqd/1121650irq/29-eth0_g0_10:49:461
121430ksoftirqd/1121650irq/29-eth0_g0_10:49:461
121750420irq/30-eth0_g0_1219-21kworker/1:209:16:441
121650420irq/29-eth0_g0_4783-21/usr/sbin/munin11:49:510
121650420irq/29-eth0_g0_26632-21grep11:04:500
121650420irq/29-eth0_g0_14900-21ls12:29:440
121650420irq/29-eth0_g0_121ksoftirqd/107:28:300
121650420irq/29-eth0_g0_0-21swapper/008:09:490
121750410irq/30-eth0_g0_1219-21kworker/1:212:08:151
121750410irq/30-eth0_g0_1219-21kworker/1:211:55:061
121750410irq/30-eth0_g0_1219-21kworker/1:211:55:061
121650410irq/29-eth0_g0_1964-21runrttasks07:08:170
121410ksoftirqd/1121750irq/30-eth0_g0_08:29:340
121750400irq/30-eth0_g0_1219-21kworker/1:209:23:551
121750400irq/30-eth0_g0_1219-21kworker/1:209:23:551
121750400irq/30-eth0_g0_1219-21kworker/1:209:13:541
121750400irq/30-eth0_g0_121ksoftirqd/110:03:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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