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2026-04-22 - 23:03

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 Wed Apr 22, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1752721420sleep1121550irq/30-eth0_g0_11:25:061
1417121270sleep1121450irq/29-eth0_g0_10:52:181
1417121270sleep1121450irq/29-eth0_g0_10:52:181
121860ksoftirqd/1121450irq/29-eth0_g0_08:51:450
121750ksoftirqd/1121550irq/30-eth0_g0_12:20:271
121720ksoftirqd/1121550irq/30-eth0_g0_09:37:511
241092620sleep0121550irq/30-eth0_g0_12:30:110
121530ksoftirqd/1121550irq/30-eth0_g0_12:33:241
121470ksoftirqd/1121550irq/30-eth0_g0_12:10:301
121460ksoftirqd/1121550irq/30-eth0_g0_10:06:511
121460ksoftirqd/1121550irq/30-eth0_g0_09:54:551
121460ksoftirqd/1121550irq/30-eth0_g0_09:48:131
121460ksoftirqd/1121550irq/30-eth0_g0_09:48:131
121460ksoftirqd/1121450irq/29-eth0_g0_10:32:071
121450450irq/29-eth0_g0_1911-21runrttasks10:00:210
121450ksoftirqd/1121450irq/29-eth0_g0_09:26:320
121450ksoftirqd/1121450irq/29-eth0_g0_07:56:411
121550440irq/30-eth0_g0_1221-21kworker/1:210:46:451
121440ksoftirqd/1121550irq/30-eth0_g0_10:46:370
121440ksoftirqd/1121450irq/29-eth0_g0_10:39:501
121440ksoftirqd/1121450irq/29-eth0_g0_09:07:411
121440ksoftirqd/1121450irq/29-eth0_g0_09:07:411
121550430irq/30-eth0_g0_1221-21kworker/1:209:54:051
121550430irq/30-eth0_g0_1221-21kworker/1:209:24:441
121550430irq/30-eth0_g0_1221-21kworker/1:209:15:361
121450430irq/29-eth0_g0_1911-21runrttasks07:08:320
121430ksoftirqd/1121550irq/30-eth0_g0_09:42:561
121430ksoftirqd/1121450irq/29-eth0_g0_11:22:071
121430ksoftirqd/1121450irq/29-eth0_g0_09:51:510
24008994227cyclictest1911-21runrttasks12:02:531
187242420sleep1121450irq/29-eth0_g0_11:37:201
187242420sleep1121450irq/29-eth0_g0_11:37:201
121450420irq/29-eth0_g0_31ksoftirqd/010:53:030
121450420irq/29-eth0_g0_31ksoftirqd/010:53:030
121450410irq/29-eth0_g0_31ksoftirqd/009:30:010
121450410irq/29-eth0_g0_31ksoftirqd/009:30:010
121450410irq/29-eth0_g0_13-21kworker/0:112:29:130
121450410irq/29-eth0_g0_13-21kworker/0:111:39:480
121450410irq/29-eth0_g0_13-21kworker/0:111:11:100
121410ksoftirqd/1121450irq/29-eth0_g0_12:06:391
121550400irq/30-eth0_g0_121ksoftirqd/109:34:411
121550400irq/30-eth0_g0_121ksoftirqd/109:34:411
121450400irq/29-eth0_g0_41072sleep009:13:040
121450400irq/29-eth0_g0_153792sleep011:04:320
121450400irq/29-eth0_g0_13-21kworker/0:110:18:260
121450400irq/29-eth0_g0_121ksoftirqd/110:04:560
121400ksoftirqd/1121550irq/30-eth0_g0_11:50:270
121400ksoftirqd/1121550irq/30-eth0_g0_10:44:060
121400ksoftirqd/1121550irq/30-eth0_g0_10:24:260
121400ksoftirqd/1121550irq/30-eth0_g0_08:14:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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