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2026-04-11 - 05:23

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 Sat Apr 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
785421150sleep03129750irq/30-eth0_g0_00:35:280
121760ksoftirqd/13129750irq/30-eth0_g0_21:20:031
121690ksoftirqd/13129750irq/30-eth0_g0_23:49:171
121630ksoftirqd/13129750irq/30-eth0_g0_22:41:090
121620ksoftirqd/13129750irq/30-eth0_g0_00:03:510
121570ksoftirqd/13129750irq/30-eth0_g0_22:29:201
35542550sleep13129750irq/30-eth0_g0_22:06:281
9962520sleep03129650irq/29-eth0_g0_21:55:380
24461995220cyclictest24257-21vmstat23:29:451
2446199521cyclictest26438-21proc_pri23:39:381
121520ksoftirqd/13129750irq/30-eth0_g0_22:21:321
121520ksoftirqd/13129750irq/30-eth0_g0_22:21:321
121520ksoftirqd/13129750irq/30-eth0_g0_21:40:571
121520ksoftirqd/13129750irq/30-eth0_g0_21:40:571
3129650510irq/29-eth0_g0_2446199cyclictest22:44:331
2446199511cyclictest17311-21unixbench_multi20:49:401
121510ksoftirqd/13129750irq/30-eth0_g0_21:18:580
3129650500irq/29-eth0_g0_2446199cyclictest23:24:371
2446199501cyclictest7758-21unixbench_singl00:34:421
2446199501cyclictest6926-21df_abs20:09:331
2446199501cyclictest31130-21proc_pri19:34:401
2446199501cyclictest22262-21cat23:24:211
123482500sleep13129650irq/29-eth0_g0_22:43:531
121500ksoftirqd/13129650irq/29-eth0_g0_00:15:171
121500ksoftirqd/13129650irq/29-eth0_g0_00:07:400
3129750490irq/30-eth0_g0_121ksoftirqd/121:34:341
3129650490irq/29-eth0_g0_2446199cyclictest22:59:331
24461994927cyclictest4931-21/usr/sbin/munin19:59:401
2446199491cyclictest323-21head00:04:441
2446199491cyclictest30779-21cat21:44:421
3129750480irq/30-eth0_g0_2446199cyclictest23:17:091
3129650480irq/29-eth0_g0_2446199cyclictest22:33:491
24461994817cyclictest31989-21cat21:49:421
121480ksoftirqd/13129750irq/30-eth0_g0_23:38:500
3129650470irq/29-eth0_g0_14471-21latency20:39:350
2446199472cyclictest6969-21latency_hist00:34:211
2446199472cyclictest6770-21/usr/sbin/munin20:09:221
2446199472cyclictest6770-21/usr/sbin/munin20:09:221
2446199471cyclictest255502sleep123:35:251
3129650460irq/29-eth0_g0_2446199cyclictest23:50:201
2446199461cyclictest10456-21grep20:24:211
121460ksoftirqd/13129750irq/30-eth0_g0_23:59:171
121460ksoftirqd/13129750irq/30-eth0_g0_23:59:171
3129750450irq/30-eth0_g0_31295-21kworker/1:122:13:451
3129750450irq/30-eth0_g0_2446199cyclictest00:11:401
3129750450irq/30-eth0_g0_21092-21vmstat21:04:431
3129750450irq/30-eth0_g0_121ksoftirqd/121:27:091
3129750450irq/30-eth0_g0_121ksoftirqd/121:17:571
3129650450irq/29-eth0_g0_2446199cyclictest22:56:151
3129650450irq/29-eth0_g0_121ksoftirqd/122:59:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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