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2026-04-21 - 09:32

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 Tue Apr 21, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2016721510sleep0121450irq/29-eth0_g0_23:33:430
121830ksoftirqd/1168592chrt23:00:420
121600ksoftirqd/1121450irq/29-eth0_g0_21:44:411
131042590sleep0121550irq/30-eth0_g0_22:24:230
121580ksoftirqd/1121450irq/29-eth0_g0_22:20:281
121570ksoftirqd/1121550irq/30-eth0_g0_23:51:221
71522540sleep1121450irq/29-eth0_g0_21:25:141
121540ksoftirqd/1121550irq/30-eth0_g0_21:59:171
243392530sleep1121550irq/30-eth0_g0_00:14:481
121530ksoftirqd/1121550irq/30-eth0_g0_23:24:011
121530ksoftirqd/1121550irq/30-eth0_g0_00:00:391
121520ksoftirqd/1121550irq/30-eth0_g0_22:30:461
121520ksoftirqd/1121550irq/30-eth0_g0_21:11:141
101722520chrt121550irq/30-eth0_g0_21:54:520
121510ksoftirqd/1210272sleep023:41:540
121510ksoftirqd/1121550irq/30-eth0_g0_21:54:461
121510ksoftirqd/1121550irq/30-eth0_g0_21:54:461
121510ksoftirqd/1121550irq/30-eth0_g0_21:33:281
121510ksoftirqd/1121550irq/30-eth0_g0_00:21:291
121500ksoftirqd/1121550irq/30-eth0_g0_23:02:401
121500ksoftirqd/1121550irq/30-eth0_g0_22:36:031
121500ksoftirqd/1121550irq/30-eth0_g0_21:14:521
121500ksoftirqd/1121550irq/30-eth0_g0_00:34:301
121500ksoftirqd/1121450irq/29-eth0_g0_22:38:420
121500ksoftirqd/1121450irq/29-eth0_g0_21:13:440
121490ksoftirqd/1121550irq/30-eth0_g0_00:09:471
121490ksoftirqd/1121550irq/30-eth0_g0_00:03:310
121480ksoftirqd/1121450irq/29-eth0_g0_23:40:181
121480ksoftirqd/1121450irq/29-eth0_g0_00:18:271
121470ksoftirqd/1121450irq/29-eth0_g0_22:46:300
121450460irq/29-eth0_g0_31ksoftirqd/022:01:280
121460ksoftirqd/1121550irq/30-eth0_g0_22:19:480
121460ksoftirqd/1121550irq/30-eth0_g0_00:35:021
121460ksoftirqd/1121450irq/29-eth0_g0_23:16:221
121460ksoftirqd/1121450irq/29-eth0_g0_22:29:101
121550450irq/30-eth0_g0_1221-21kworker/1:223:26:391
121450ksoftirqd/1121550irq/30-eth0_g0_22:15:171
121550430irq/30-eth0_g0_1221-21kworker/1:222:56:351
121550430irq/30-eth0_g0_1221-21kworker/1:222:04:441
121430ksoftirqd/1121550irq/30-eth0_g0_23:27:080
121430ksoftirqd/1121450irq/29-eth0_g0_22:50:101
121550420irq/30-eth0_g0_1221-21kworker/1:222:48:501
121450420irq/29-eth0_g0_1911-21runrttasks00:38:290
121450420irq/29-eth0_g0_13-21kworker/0:121:26:490
121450420irq/29-eth0_g0_121ksoftirqd/122:09:300
121550410irq/30-eth0_g0_121ksoftirqd/123:54:380
121450410irq/29-eth0_g0_31ksoftirqd/022:26:140
121450410irq/29-eth0_g0_13-21kworker/0:123:59:490
121450410irq/29-eth0_g0_13-21kworker/0:122:32:070
121550400irq/30-eth0_g0_1221-21kworker/1:223:06:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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