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2026-03-20 - 09:18

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 Fri Mar 20, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211070ksoftirqd/1121750irq/30-eth0_g0_20:49:541
1211060ksoftirqd/1121750irq/30-eth0_g0_21:55:141
121930ksoftirqd/1121750irq/30-eth0_g0_23:54:541
121840ksoftirqd/1121650irq/29-eth0_g0_23:34:360
121780ksoftirqd/1121750irq/30-eth0_g0_23:24:591
197302720sleep1121750irq/30-eth0_g0_21:49:521
121640ksoftirqd/1121750irq/30-eth0_g0_21:48:390
121600ksoftirqd/1121750irq/30-eth0_g0_22:04:531
121600ksoftirqd/1121750irq/30-eth0_g0_22:04:531
244812580sleep0121650irq/29-eth0_g0_00:21:100
121580ksoftirqd/1121750irq/30-eth0_g0_23:36:151
121530ksoftirqd/1121750irq/30-eth0_g0_23:03:161
121510ksoftirqd/1121750irq/30-eth0_g0_22:47:381
121500ksoftirqd/1121750irq/30-eth0_g0_23:10:341
121500ksoftirqd/1121750irq/30-eth0_g0_23:04:511
121500ksoftirqd/1121650irq/29-eth0_g0_21:56:460
121480ksoftirqd/1121750irq/30-eth0_g0_22:44:480
121480ksoftirqd/1121750irq/30-eth0_g0_19:35:011
121460ksoftirqd/1121750irq/30-eth0_g0_21:33:050
121450ksoftirqd/1121750irq/30-eth0_g0_21:19:011
121450ksoftirqd/1121650irq/29-eth0_g0_23:24:520
192192440sleep1121750irq/30-eth0_g0_21:49:011
12550994430cyclictest2029-21runrttasks22:42:181
121440ksoftirqd/1121750irq/30-eth0_g0_22:14:431
121650430irq/29-eth0_g0_31ksoftirqd/023:07:350
121650430irq/29-eth0_g0_31ksoftirqd/000:09:250
121750420irq/30-eth0_g0_470-21kworker/1:122:33:391
121650420irq/29-eth0_g0_31ksoftirqd/023:20:030
121650420irq/29-eth0_g0_31ksoftirqd/022:05:540
121650420irq/29-eth0_g0_31ksoftirqd/022:05:540
121650420irq/29-eth0_g0_2029-21runrttasks21:07:530
121650420irq/29-eth0_g0_121ksoftirqd/122:09:460
121650420irq/29-eth0_g0_121ksoftirqd/121:39:471
121420ksoftirqd/1121650irq/29-eth0_g0_23:45:401
121750410irq/30-eth0_g0_470-21kworker/1:100:24:511
121650410irq/29-eth0_g0_31ksoftirqd/021:59:570
121650410irq/29-eth0_g0_13-21kworker/0:123:43:260
121650410irq/29-eth0_g0_13-21kworker/0:123:39:270
121650410irq/29-eth0_g0_13-21kworker/0:122:49:470
121410ksoftirqd/1121650irq/29-eth0_g0_23:47:520
121750400irq/30-eth0_g0_470-21kworker/1:123:40:271
121750400irq/30-eth0_g0_470-21kworker/1:122:24:231
121750400irq/30-eth0_g0_121ksoftirqd/121:38:261
121650400irq/29-eth0_g0_31307-21missed_timers20:24:530
121650400irq/29-eth0_g0_31ksoftirqd/022:55:030
121650400irq/29-eth0_g0_31ksoftirqd/019:39:510
121650400irq/29-eth0_g0_2029-21runrttasks19:05:010
121650400irq/29-eth0_g0_13-21kworker/0:122:38:150
121650400irq/29-eth0_g0_13-21kworker/0:121:34:510
121650400irq/29-eth0_g0_13-21kworker/0:100:29:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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