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2026-04-24 - 14:23

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 Apr 24, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3236021530sleep1121450irq/29-eth0_g0_11:31:451
553521190sleep0121450irq/29-eth0_g0_12:26:420
2442921040sleep1121550irq/30-eth0_g0_10:14:091
250782710sleep1121450irq/29-eth0_g0_10:19:521
18122610sleep0121550irq/30-eth0_g0_11:49:590
18122610sleep0121550irq/30-eth0_g0_11:49:590
3232600sleep1121450irq/29-eth0_g0_11:35:511
121490ksoftirqd/1121550irq/30-eth0_g0_09:45:241
121470ksoftirqd/1121550irq/30-eth0_g0_12:28:371
121550460irq/30-eth0_g0_1221-21kworker/1:211:19:481
121450460irq/29-eth0_g0_13-21kworker/0:110:52:180
121460ksoftirqd/1121450irq/29-eth0_g0_07:25:541
288822450sleep0121450irq/29-eth0_g0_10:57:430
288822450sleep0121450irq/29-eth0_g0_10:57:430
121450ksoftirqd/1121550irq/30-eth0_g0_11:58:021
121450ksoftirqd/1121450irq/29-eth0_g0_10:19:001
248652440sleep0121550irq/30-eth0_g0_10:18:180
121550440irq/30-eth0_g0_0-21swapper/110:46:061
121440ksoftirqd/1121450irq/29-eth0_g0_09:14:411
121550430irq/30-eth0_g0_1221-21kworker/1:210:25:031
121550430irq/30-eth0_g0_1221-21kworker/1:209:51:351
121430ksoftirqd/1121550irq/30-eth0_g0_12:21:240
563899429cyclictest121550irq/30-eth0_g0_11:13:581
274732420sleep0121550irq/30-eth0_g0_10:44:040
121550420irq/30-eth0_g0_1221-21kworker/1:212:36:201
121550420irq/30-eth0_g0_1221-21kworker/1:211:46:361
121450420irq/29-eth0_g0_1911-21runrttasks07:06:380
121450420irq/29-eth0_g0_13-21kworker/0:110:28:220
121420ksoftirqd/1121450irq/29-eth0_g0_12:30:021
121550410irq/30-eth0_g0_31ksoftirqd/009:25:070
121550410irq/30-eth0_g0_1221-21kworker/1:209:29:121
121450410irq/29-eth0_g0_20366-21chrt09:34:130
121450410irq/29-eth0_g0_121ksoftirqd/112:12:560
121410ksoftirqd/1121450irq/29-eth0_g0_12:31:070
563899402cyclictest4265-21munin-run12:14:401
121550400irq/30-eth0_g0_1221-21kworker/1:211:26:191
121450400irq/29-eth0_g0_13-21kworker/0:111:48:430
121450400irq/29-eth0_g0_13-21kworker/0:110:20:500
121450400irq/29-eth0_g0_121ksoftirqd/109:58:440
121450400irq/29-eth0_g0_121ksoftirqd/109:58:440
121400ksoftirqd/1121550irq/30-eth0_g0_11:10:200
121400ksoftirqd/1121550irq/30-eth0_g0_10:14:210
121400ksoftirqd/1121450irq/29-eth0_g0_10:01:361
121550390irq/30-eth0_g0_1221-21kworker/1:211:17:121
121550390irq/30-eth0_g0_1221-21kworker/1:210:31:121
121550390irq/30-eth0_g0_0-21swapper/109:19:071
121450390irq/29-eth0_g0_13-21kworker/0:111:29:090
121450390irq/29-eth0_g0_13-21kworker/0:110:30:580
121450390irq/29-eth0_g0_13-21kworker/0:109:19:360
121390ksoftirqd/1121450irq/29-eth0_g0_10:51:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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