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2026-08-29 - 03:38

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 Sat Aug 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2165721310sleep1121750irq/30-eth0_g0_00:31:371
121880ksoftirqd/1121650irq/29-eth0_g0_21:36:250
121840ksoftirqd/1121650irq/29-eth0_g0_23:57:380
121830ksoftirqd/1121650irq/29-eth0_g0_23:55:480
121810ksoftirqd/1121750irq/30-eth0_g0_23:41:221
175592760sleep1121750irq/30-eth0_g0_22:04:241
121700ksoftirqd/1121750irq/30-eth0_g0_19:38:110
225312670sleep1121750irq/30-eth0_g0_22:25:191
121670ksoftirqd/1121750irq/30-eth0_g0_23:27:031
75892590sleep0121750irq/30-eth0_g0_21:22:290
121520ksoftirqd/1121750irq/30-eth0_g0_23:36:371
121520ksoftirqd/1121750irq/30-eth0_g0_23:36:371
121520ksoftirqd/1121650irq/29-eth0_g0_23:07:250
37222510sleep0121650irq/29-eth0_g0_21:06:270
121750480irq/30-eth0_g0_0-21swapper/122:33:371
121470ksoftirqd/1121750irq/30-eth0_g0_22:55:241
121470ksoftirqd/1121650irq/29-eth0_g0_22:27:081
121750460irq/30-eth0_g0_1219-21kworker/1:221:12:201
121460ksoftirqd/1121750irq/30-eth0_g0_21:09:131
121450ksoftirqd/1121650irq/29-eth0_g0_19:52:331
121450ksoftirqd/1121650irq/29-eth0_g0_19:52:331
121450ksoftirqd/1121650irq/29-eth0_g0_00:15:051
113682450sleep1121650irq/29-eth0_g0_21:38:401
300432440chrt121650irq/29-eth0_g0_22:56:151
121440ksoftirqd/1121750irq/30-eth0_g0_22:53:040
71732430sleep1121750irq/30-eth0_g0_23:34:061
121430ksoftirqd/1121750irq/30-eth0_g0_21:29:401
121750420irq/30-eth0_g0_1219-21kworker/1:222:17:271
121750420irq/30-eth0_g0_1219-21kworker/1:221:54:501
121750420irq/30-eth0_g0_1219-21kworker/1:221:25:021
121750420irq/30-eth0_g0_1219-21kworker/1:200:28:181
121750420irq/30-eth0_g0_1219-21kworker/1:200:25:021
121650420irq/29-eth0_g0_13-21kworker/0:121:56:510
121650420irq/29-eth0_g0_13-21kworker/0:100:16:250
121420ksoftirqd/1121650irq/29-eth0_g0_22:01:001
121420ksoftirqd/1121650irq/29-eth0_g0_19:41:161
121420ksoftirqd/1121650irq/29-eth0_g0_19:21:271
121420ksoftirqd/1117450irq/72-mmc020:25:341
663199411cyclictest9541-21cat21:31:211
121750410irq/30-eth0_g0_1219-21kworker/1:200:17:291
121750410irq/30-eth0_g0_121ksoftirqd/119:30:451
121650410irq/29-eth0_g0_13-21kworker/0:122:24:470
121650410irq/29-eth0_g0_13-21kworker/0:121:49:030
121650410irq/29-eth0_g0_121ksoftirqd/122:45:360
121650410irq/29-eth0_g0_121ksoftirqd/122:45:360
121650410irq/29-eth0_g0_0-21swapper/019:01:250
121650410irq/29-eth0_g0_0-21swapper/019:01:250
21292400sleep1121650irq/29-eth0_g0_23:12:311
121750400irq/30-eth0_g0_2900-21/usr/sbin/munin23:16:221
121750400irq/30-eth0_g0_2900-21/usr/sbin/munin23:16:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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