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2026-09-11 - 09:21

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 Sep 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121840ksoftirqd/1121650irq/29-eth0_g0_21:22:160
121820ksoftirqd/1121650irq/29-eth0_g0_22:11:410
121720ksoftirqd/1121750irq/30-eth0_g0_19:51:451
121720ksoftirqd/1121750irq/30-eth0_g0_19:51:451
121610ksoftirqd/1121750irq/30-eth0_g0_21:06:121
121550ksoftirqd/1121650irq/29-eth0_g0_22:46:101
191012540sleep0121750irq/30-eth0_g0_21:12:270
241562520sleep0121650irq/29-eth0_g0_21:34:140
121510ksoftirqd/1121750irq/30-eth0_g0_23:24:451
121500ksoftirqd/11999199cyclictest21:43:111
137622460sleep0121750irq/30-eth0_g0_23:04:140
121460ksoftirqd/11999199cyclictest22:26:431
121460ksoftirqd/1121750irq/30-eth0_g0_23:46:321
121460ksoftirqd/1121750irq/30-eth0_g0_22:25:011
121460ksoftirqd/1121650irq/29-eth0_g0_21:52:191
267122450sleep0121650irq/29-eth0_g0_21:45:280
121650450irq/29-eth0_g0_19108-21irqstats23:25:520
121650450irq/29-eth0_g0_19108-21irqstats23:25:520
121450ksoftirqd/1121650irq/29-eth0_g0_21:26:431
121750440irq/30-eth0_g0_31030-21munin-plugin-st00:15:341
121440ksoftirqd/1121750irq/30-eth0_g0_22:13:231
121440ksoftirqd/1121650irq/29-eth0_g0_22:07:331
121750430irq/30-eth0_g0_1219-21kworker/1:222:38:071
121650430irq/29-eth0_g0_31ksoftirqd/000:20:180
121650430irq/29-eth0_g0_13-21kworker/0:122:19:220
19322420sleep0121650irq/29-eth0_g0_00:26:400
121750420irq/30-eth0_g0_1219-21kworker/1:223:12:271
121750420irq/30-eth0_g0_1219-21kworker/1:221:25:251
121650420irq/29-eth0_g0_31ksoftirqd/023:47:290
121650420irq/29-eth0_g0_13-21kworker/0:122:38:240
121650420irq/29-eth0_g0_121ksoftirqd/119:40:510
121420ksoftirqd/1121650irq/29-eth0_g0_22:56:201
27172410sleep0121650irq/29-eth0_g0_20:05:520
121750410irq/30-eth0_g0_1219-21kworker/1:223:52:351
121750410irq/30-eth0_g0_1219-21kworker/1:221:49:551
121650410irq/29-eth0_g0_30615-21uptime00:10:560
121650410irq/29-eth0_g0_31ksoftirqd/000:04:280
121650410irq/29-eth0_g0_1964-21runrttasks23:50:570
121650410irq/29-eth0_g0_19411-21entropy19:00:450
121650410irq/29-eth0_g0_161522sleep023:13:320
121410ksoftirqd/1121650irq/29-eth0_g0_19:55:501
1999199407cyclictest121750irq/30-eth0_g0_00:16:151
1999199401cyclictest313402sleep122:02:151
121750400irq/30-eth0_g0_1219-21kworker/1:223:38:461
121750400irq/30-eth0_g0_1219-21kworker/1:200:08:111
121750400irq/30-eth0_g0_121ksoftirqd/123:09:071
121650400irq/29-eth0_g0_31ksoftirqd/000:23:000
121650400irq/29-eth0_g0_1964-21runrttasks21:59:470
121650400irq/29-eth0_g0_13-21kworker/0:123:56:030
121650400irq/29-eth0_g0_13-21kworker/0:123:22:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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