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2026-09-07 - 07:50

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 Mon Sep 07, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121930ksoftirqd/1121750irq/30-eth0_g0_19:00:581
121810ksoftirqd/1121750irq/30-eth0_g0_21:21:281
82202780sleep0121750irq/30-eth0_g0_19:46:040
150152750sleep1121750irq/30-eth0_g0_22:26:051
175192730sleep0121750irq/30-eth0_g0_22:36:070
241202720sleep1121650irq/29-eth0_g0_23:04:501
327672660sleep1121650irq/29-eth0_g0_19:15:541
139372640chrt121750irq/30-eth0_g0_22:21:061
61492600sleep0121750irq/30-eth0_g0_21:50:580
61492600sleep0121750irq/30-eth0_g0_21:50:580
44192600chrt121750irq/30-eth0_g0_19:31:021
30852600sleep1121750irq/30-eth0_g0_19:26:011
215462560sleep0121750irq/30-eth0_g0_20:41:020
272982510chrt121650irq/29-eth0_g0_21:05:541
315342500sleep0121650irq/29-eth0_g0_21:21:050
121750460irq/30-eth0_g0_250712sleep123:06:381
121750460irq/30-eth0_g0_1219-21kworker/1:223:23:161
81582450sleep0121650irq/29-eth0_g0_21:59:220
121650450irq/29-eth0_g0_31ksoftirqd/023:40:420
306642440sleep0121650irq/29-eth0_g0_21:18:080
121650440irq/29-eth0_g0_31ksoftirqd/021:46:090
121650440irq/29-eth0_g0_121ksoftirqd/121:52:151
121650440irq/29-eth0_g0_121ksoftirqd/121:52:151
121650440irq/29-eth0_g0_121ksoftirqd/121:00:571
130842430sleep1121750irq/30-eth0_g0_22:19:421
121750430irq/30-eth0_g0_7997-21grep19:46:001
121750430irq/30-eth0_g0_121ksoftirqd/122:39:541
121650430irq/29-eth0_g0_16152-21/usr/sbin/munin22:31:040
30225994236cyclictest22144-21missed_timers22:56:011
121650420irq/29-eth0_g0_31ksoftirqd/023:27:380
30225994135cyclictest9690-21grep00:16:061
121750410irq/30-eth0_g0_29215-21df_abs19:00:580
121650410irq/29-eth0_g0_13-21kworker/0:122:04:100
121650410irq/29-eth0_g0_12720-21/usr/sbin/munin00:31:030
121410ksoftirqd/1121650irq/29-eth0_g0_21:41:031
30225994035cyclictest5649-21seq19:36:041
30225994034cyclictest31867-21missed_timers19:11:001
30225994034cyclictest31867-21missed_timers19:11:001
121750400irq/30-eth0_g0_121ksoftirqd/100:00:371
121650400irq/29-eth0_g0_31ksoftirqd/019:40:550
121650400irq/29-eth0_g0_1964-21runrttasks21:30:210
121650400irq/29-eth0_g0_13-21kworker/0:123:18:570
121650400irq/29-eth0_g0_13-21kworker/0:123:00:230
121650400irq/29-eth0_g0_13-21kworker/0:122:21:010
121650400irq/29-eth0_g0_13-21kworker/0:122:11:420
121650400irq/29-eth0_g0_13-21kworker/0:121:42:310
121650400irq/29-eth0_g0_13-21kworker/0:121:31:190
121650400irq/29-eth0_g0_13-21kworker/0:100:26:340
121650400irq/29-eth0_g0_13-21kworker/0:100:01:180
121650400irq/29-eth0_g0_121ksoftirqd/120:01:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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