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2026-08-07 - 21:58

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 Fri Aug 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28412570sleep0121750irq/30-eth0_g0_09:57:100
305342550sleep0121650irq/29-eth0_g0_09:37:120
170802540sleep1121750irq/30-eth0_g0_10:54:371
121650530irq/29-eth0_g0_2563799cyclictest08:57:160
121530ksoftirqd/1121750irq/30-eth0_g0_12:35:521
121650520irq/29-eth0_g0_2563799cyclictest08:32:180
121500ksoftirqd/1121750irq/30-eth0_g0_09:36:051
121500ksoftirqd/1121650irq/29-eth0_g0_12:18:381
121750490irq/30-eth0_g0_2563799cyclictest09:32:150
121650490irq/29-eth0_g0_2563799cyclictest09:54:180
121650480irq/29-eth0_g0_2563799cyclictest12:16:010
121650480irq/29-eth0_g0_2563799cyclictest07:32:140
121470ksoftirqd/1121750irq/30-eth0_g0_10:42:351
25637994622cyclictest3880-21/usr/sbin/munin10:02:140
121750460irq/30-eth0_g0_2563799cyclictest11:15:510
121750460irq/30-eth0_g0_2563799cyclictest09:50:100
121650460irq/29-eth0_g0_2563799cyclictest12:07:160
121650460irq/29-eth0_g0_2563799cyclictest11:41:500
121650460irq/29-eth0_g0_2563799cyclictest09:22:290
121750450irq/30-eth0_g0_2563799cyclictest09:11:420
121650450irq/29-eth0_g0_2563799cyclictest07:47:150
121450ksoftirqd/1121650irq/29-eth0_g0_10:58:100
121650440irq/29-eth0_g0_2563799cyclictest12:27:180
121650440irq/29-eth0_g0_2563799cyclictest12:27:180
121650440irq/29-eth0_g0_2563799cyclictest09:42:120
2563799433cyclictest121650irq/29-eth0_g0_12:21:240
121750430irq/30-eth0_g0_8444-21ntpq08:07:141
121650430irq/29-eth0_g0_2563799cyclictest10:34:220
2563799427cyclictest0-21swapper/007:41:570
2563799421cyclictest26812sleep007:42:430
2563799421cyclictest14023-21missed_timers10:42:120
2563799421cyclictest121650irq/29-eth0_g0_08:19:430
121750420irq/30-eth0_g0_8089-21seq12:30:451
121750420irq/30-eth0_g0_8089-21seq12:30:451
121750420irq/30-eth0_g0_1219-21kworker/1:210:06:571
121750420irq/30-eth0_g0_10968-21ps08:17:151
121650420irq/29-eth0_g0_25139-21unixbench_multi07:02:180
73982410sleep0121650irq/29-eth0_g0_10:16:120
25638994126cyclictest1964-21runrttasks08:30:071
2563799415cyclictest121650irq/29-eth0_g0_08:52:170
2563799413cyclictest121650irq/29-eth0_g0_11:42:140
2563799412cyclictest121650irq/29-eth0_g0_08:07:190
2563799411cyclictest58852sleep012:22:080
2563799411cyclictest121650irq/29-eth0_g0_07:57:170
2563799411cyclictest10699-21unixbench_singl10:27:180
2563799411cyclictest10699-21unixbench_singl10:27:180
121750410irq/30-eth0_g0_2563799cyclictest11:57:090
121750410irq/30-eth0_g0_24793-21cat07:02:121
121650410irq/29-eth0_g0_2563799cyclictest11:35:090
121650410irq/29-eth0_g0_2563799cyclictest11:35:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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