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2026-08-17 - 00:51

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 Sun Aug 16, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2891121750sleep1121650irq/29-eth0_g0_09:41:071
682921610sleep1121750irq/30-eth0_g0_10:21:541
273632760sleep1121750irq/30-eth0_g0_09:32:181
121520ksoftirqd/1281772sleep011:49:450
121510ksoftirqd/1121750irq/30-eth0_g0_11:17:191
121500ksoftirqd/1121750irq/30-eth0_g0_11:09:191
121490ksoftirqd/1121750irq/30-eth0_g0_11:59:021
327282480sleep1121750irq/30-eth0_g0_07:41:581
323032480sleep1121650irq/29-eth0_g0_09:52:541
121480ksoftirqd/1121750irq/30-eth0_g0_09:59:531
121470ksoftirqd/1121750irq/30-eth0_g0_11:33:521
121470ksoftirqd/1121650irq/29-eth0_g0_07:40:181
121460ksoftirqd/1121650irq/29-eth0_g0_11:16:141
121450ksoftirqd/1121750irq/30-eth0_g0_11:24:441
121450ksoftirqd/1121650irq/29-eth0_g0_11:10:200
121450ksoftirqd/1121650irq/29-eth0_g0_10:54:561
121750440irq/30-eth0_g0_22703-21/usr/sbin/munin07:01:541
121750440irq/30-eth0_g0_22703-21/usr/sbin/munin07:01:541
121750440irq/30-eth0_g0_1219-21kworker/1:211:41:521
121650440irq/29-eth0_g0_1964-21runrttasks11:35:410
121650440irq/29-eth0_g0_1964-21runrttasks10:19:170
121440ksoftirqd/1121750irq/30-eth0_g0_12:11:221
121440ksoftirqd/1121750irq/30-eth0_g0_12:03:471
121440ksoftirqd/1121750irq/30-eth0_g0_11:29:081
121440ksoftirqd/1121650irq/29-eth0_g0_11:56:041
121440ksoftirqd/1121650irq/29-eth0_g0_11:56:041
121440ksoftirqd/1121650irq/29-eth0_g0_11:02:071
121440ksoftirqd/1121650irq/29-eth0_g0_08:36:581
121750430irq/30-eth0_g0_264012sleep109:30:231
121750430irq/30-eth0_g0_1219-21kworker/1:210:59:111
121750430irq/30-eth0_g0_1219-21kworker/1:209:23:401
121750430irq/30-eth0_g0_1219-21kworker/1:209:23:401
121650430irq/29-eth0_g0_22364-21df07:01:490
121650430irq/29-eth0_g0_22364-21df07:01:490
121430ksoftirqd/1121750irq/30-eth0_g0_10:47:111
121430ksoftirqd/1121650irq/29-eth0_g0_10:03:351
121750420irq/30-eth0_g0_1219-21kworker/1:209:16:141
54322410sleep1121650irq/29-eth0_g0_12:28:401
121650410irq/29-eth0_g0_281922nfs_client09:36:520
121650410irq/29-eth0_g0_20108-21latency11:16:510
121650410irq/29-eth0_g0_121ksoftirqd/112:11:150
121650410irq/29-eth0_g0_121ksoftirqd/109:48:440
121410ksoftirqd/1121750irq/30-eth0_g0_11:51:560
121410ksoftirqd/1121750irq/30-eth0_g0_11:51:560
121410ksoftirqd/1121650irq/29-eth0_g0_12:34:211
121410ksoftirqd/1121650irq/29-eth0_g0_11:51:351
121410ksoftirqd/1121650irq/29-eth0_g0_10:13:561
121410ksoftirqd/1121650irq/29-eth0_g0_10:11:081
73562400sleep0121750irq/30-eth0_g0_10:24:300
30892400sleep0121750irq/30-eth0_g0_12:19:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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