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2026-07-22 - 21:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 rack7slot2s.osadl.org (updated Wed Jul 22, 2026 12:48:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
335740399338188,112cyclictest3385456-21ntpq09:46:060
335740399331200,113cyclictest3387680-21ntpq09:56:370
335740399331200,113cyclictest3387680-21ntpq09:56:370
335740399317175,107cyclictest3380043-21ntpq09:20:570
335740399317172,110cyclictest3401738-21ntpq11:01:300
335740399317150,129cyclictest3368034-21mailstats08:11:500
335740399317150,129cyclictest3368034-21mailstats08:11:490
335740399315159,117cyclictest369-21rs:main0
335740399315159,117cyclictest369-21rs:main0
335740399313150,127cyclictest719-21lldpd08:05:180
335740399313150,117cyclictest3410854-21kworker/u9:7+rpciod12:00:410
335740399313150,117cyclictest3410854-21kworker/u9:7+rpciod12:00:410
335740399311162,113cyclictest3369852-21/usr/sbin/munin08:21:560
335740399311162,113cyclictest3369852-21/usr/sbin/munin08:21:560
335740399310178,93cyclictest3394600-21kworker/u9:14+xprtiod10:33:190
335740399310178,93cyclictest3394600-21kworker/u9:14+xprtiod10:33:190
335740399310157,115cyclictest3418880-21rm12:20:380
335740399310157,115cyclictest3418880-21rm12:20:380
335740399309182,109cyclictest3410628-21mailstats11:42:000
335740399307178,92cyclictest3408722-21kworker/u9:5+rpciod12:30:130
335740399307164,106cyclictest3388542-21ssh10:00:420
335740399307152,112cyclictest3394601-21kworker/u9:15+xprtiod10:41:180
335740399306152,116cyclictest3378864-21irqstats09:15:490
335740399306143,117cyclictest3368225-21kworker/u9:9+rpciod08:50:500
335740399305205,90cyclictest3357402-21cyclictest10:06:210
335740399305156,110cyclictest3386637-21ntp_states09:51:420
335740399305156,110cyclictest3386637-21ntp_states09:51:410
335740399305154,112cyclictest3400464-21irqstats10:55:470
335740399304142,110cyclictest3396243-21ntpq10:36:050
335740399304142,110cyclictest3396243-21ntpq10:36:040
335740399303150,111cyclictest3357371-21kworker/u9:1+rpciod07:12:040
335740399303150,111cyclictest3357371-21kworker/u9:1+rpciod07:12:040
335740399302143,122cyclictest3381157-21rm09:26:130
335740399302143,122cyclictest3381157-21rm09:26:130
335740399301153,102cyclictest3406541-21kworker/u9:6+rpciod11:25:230
335740399300160,88cyclictest171rcu_preempt07:31:530
335740399300160,88cyclictest171rcu_preempt07:31:530
335740399300158,103cyclictest171rcu_preempt11:20:570
335740399300158,103cyclictest171rcu_preempt11:20:570
335740399300153,109cyclictest3402572-21df11:05:320
335740399300153,109cyclictest3402572-21df11:05:320
335740399300148,114cyclictest3399401-21kernelversion10:50:470
335740399300134,129cyclictest3363839-21rt-features07:46:530
335740399299153,114cyclictest3382333-21ld09:31:430
335740399299153,114cyclictest3382333-21ld09:31:420
335740399299137,125cyclictest3366030-21df_inode08:00:340
335740399299137,125cyclictest3366030-21df_inode08:00:340
335740399297152,108cyclictest3409434-21grep11:36:550
335740399297146,114cyclictest3377408-21diskmemload11:16:590
335740399296146,108cyclictest3369061-21kworker/u9:12+rpciod08:45:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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