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2026-05-25 - 17:22

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Mon May 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121990ksoftirqd/1121750irq/30-eth0_g0_09:39:381
121930ksoftirqd/1121750irq/30-eth0_g0_07:05:140
121930ksoftirqd/1121750irq/30-eth0_g0_07:05:140
121910ksoftirqd/1121750irq/30-eth0_g0_09:15:160
121710ksoftirqd/1121750irq/30-eth0_g0_10:58:321
121630ksoftirqd/1121750irq/30-eth0_g0_07:25:150
99152560sleep0121650irq/29-eth0_g0_12:06:390
128022550sleep0121750irq/30-eth0_g0_10:05:160
121520ksoftirqd/1121750irq/30-eth0_g0_10:36:581
121510ksoftirqd/1121750irq/30-eth0_g0_12:09:391
121500ksoftirqd/1121750irq/30-eth0_g0_11:27:011
249272490sleep0121650irq/29-eth0_g0_08:44:550
121650490irq/29-eth0_g0_7251-21cpu09:45:060
121490ksoftirqd/1121650irq/29-eth0_g0_11:40:390
121470ksoftirqd/1121750irq/30-eth0_g0_11:12:401
121460ksoftirqd/1121750irq/30-eth0_g0_09:20:441
121750450irq/30-eth0_g0_1219-21kworker/1:211:59:001
121750450irq/30-eth0_g0_1219-21kworker/1:211:59:001
121450ksoftirqd/1121750irq/30-eth0_g0_11:45:011
121450ksoftirqd/1121750irq/30-eth0_g0_10:29:331
121450ksoftirqd/1121750irq/30-eth0_g0_10:04:301
121450ksoftirqd/1121750irq/30-eth0_g0_07:15:541
121450ksoftirqd/1121650irq/29-eth0_g0_09:19:241
121450ksoftirqd/1121650irq/29-eth0_g0_08:21:501
121650440irq/29-eth0_g0_31ksoftirqd/009:10:110
121440ksoftirqd/1121750irq/30-eth0_g0_10:40:361
121440ksoftirqd/1121750irq/30-eth0_g0_10:38:530
121440ksoftirqd/1121750irq/30-eth0_g0_09:36:560
32782430chrt121650irq/29-eth0_g0_09:27:320
121750430irq/30-eth0_g0_1219-21kworker/1:212:22:271
121650430irq/29-eth0_g0_31ksoftirqd/012:04:360
121650430irq/29-eth0_g0_26330-21runrttasks11:00:210
121750420irq/30-eth0_g0_1219-21kworker/1:209:26:371
121650420irq/29-eth0_g0_31ksoftirqd/011:05:110
121650420irq/29-eth0_g0_31ksoftirqd/011:05:110
121650420irq/29-eth0_g0_1964-21runrttasks11:30:270
121420ksoftirqd/1121650irq/29-eth0_g0_10:19:161
121420ksoftirqd/1121650irq/29-eth0_g0_10:15:150
171499417cyclictest15785-21fgrep08:05:151
171499417cyclictest15785-21fgrep08:05:151
121750410irq/30-eth0_g0_1219-21kworker/1:209:45:031
121750410irq/30-eth0_g0_121ksoftirqd/109:30:071
121410ksoftirqd/1121650irq/29-eth0_g0_08:50:171
171499401cyclictest6579-21grep11:54:551
171499401cyclictest154032sleep112:30:081
171499401cyclictest154032sleep112:30:081
121750400irq/30-eth0_g0_1263-21grep07:05:151
121750400irq/30-eth0_g0_1263-21grep07:05:151
121750400irq/30-eth0_g0_1219-21kworker/1:210:52:201
121750400irq/30-eth0_g0_1219-21kworker/1:209:51:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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