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2026-05-28 - 19:30

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 Thu May 28, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121880ksoftirqd/1121750irq/30-eth0_g0_08:41:421
121790ksoftirqd/1121750irq/30-eth0_g0_11:48:171
121610ksoftirqd/184132sleep011:32:010
85582570sleep1121750irq/30-eth0_g0_09:20:061
121560ksoftirqd/1121650irq/29-eth0_g0_10:16:371
121540ksoftirqd/1121750irq/30-eth0_g0_12:15:231
121540ksoftirqd/1121650irq/29-eth0_g0_11:10:000
73822520sleep0121650irq/29-eth0_g0_11:29:170
230212510sleep0121750irq/30-eth0_g0_12:30:540
230212510sleep0121750irq/30-eth0_g0_12:30:540
121510ksoftirqd/1121750irq/30-eth0_g0_09:46:430
121510ksoftirqd/1121750irq/30-eth0_g0_09:46:430
121500ksoftirqd/1121750irq/30-eth0_g0_11:43:531
121500ksoftirqd/1121650irq/29-eth0_g0_09:32:510
200272490sleep1121650irq/29-eth0_g0_10:07:091
121490ksoftirqd/1121650irq/29-eth0_g0_07:19:591
121650480irq/29-eth0_g0_31ksoftirqd/010:24:590
121480ksoftirqd/1121650irq/29-eth0_g0_09:20:580
159122470sleep1121650irq/29-eth0_g0_12:03:441
150602470sleep1121650irq/29-eth0_g0_09:46:221
150602470sleep1121650irq/29-eth0_g0_09:46:221
72902460sleep1121750irq/30-eth0_g0_09:15:051
121650460irq/29-eth0_g0_16000-21mailstats09:50:070
121460ksoftirqd/1121750irq/30-eth0_g0_09:34:241
121460ksoftirqd/1121750irq/30-eth0_g0_07:30:040
121750450irq/30-eth0_g0_121ksoftirqd/109:09:571
121450ksoftirqd/1121650irq/29-eth0_g0_10:48:010
121750440irq/30-eth0_g0_1219-21kworker/1:212:29:201
121750440irq/30-eth0_g0_1219-21kworker/1:210:11:441
121650440irq/29-eth0_g0_7866-21ntp_offset07:05:030
121650440irq/29-eth0_g0_31ksoftirqd/010:16:370
121650440irq/29-eth0_g0_31ksoftirqd/009:10:390
121440ksoftirqd/1121650irq/29-eth0_g0_11:57:061
323462430sleep0121750irq/30-eth0_g0_10:58:080
323462430sleep0121750irq/30-eth0_g0_10:58:080
121750430irq/30-eth0_g0_1219-21kworker/1:211:24:501
121430ksoftirqd/1121650irq/29-eth0_g0_07:19:471
121750420irq/30-eth0_g0_8623-21cyclictest10:55:051
121750420irq/30-eth0_g0_8623-21cyclictest10:55:051
121750420irq/30-eth0_g0_8147-21unixbench_singl07:05:071
121750420irq/30-eth0_g0_60182sleep111:22:381
121750420irq/30-eth0_g0_1219-21kworker/1:209:27:561
121750420irq/30-eth0_g0_121ksoftirqd/109:40:021
121650420irq/29-eth0_g0_5558-21munin-run09:09:470
121650420irq/29-eth0_g0_13-21kworker/0:111:50:010
8625994127cyclictest1964-21runrttasks07:13:441
243152410sleep0121650irq/29-eth0_g0_12:36:440
121750410irq/30-eth0_g0_2126-21lldpd11:02:441
121750410irq/30-eth0_g0_1219-21kworker/1:211:29:581
121650410irq/29-eth0_g0_17205-21sendmail_mailqu09:55:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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