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2026-04-09 - 21:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Thu Apr 09, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
93402870,3sleep09345-21sh10:21:520
93402870,3sleep09345-21sh10:21:520
317842770,2chrt0-21swapper/211:21:522
317842770,2chrt0-21swapper/211:21:522
317842770,2chrt0-21swapper/211:21:522
207732750,2chrt0-21swapper/209:22:172
207732750,2chrt0-21swapper/209:22:172
207732750,2chrt0-21swapper/209:22:172
129962740,2sleep20-21swapper/211:57:062
129962740,2sleep20-21swapper/211:57:062
129962740,2sleep20-21swapper/211:57:062
203262710,3sleep00-21swapper/007:57:050
203262710,3sleep00-21swapper/007:57:050
262522600,3chrt201rcuc/009:37:230
262522600,3chrt201rcuc/009:37:230
262522600,3chrt201rcuc/009:37:230
225192600,2sleep122646-21users09:27:151
225192600,2sleep122646-21users09:27:151
123992590,3sleep012027-21/usr/sbin/munin09:02:050
123992590,3sleep012027-21/usr/sbin/munin09:02:050
96372570,3sleep08838-21/usr/sbin/munin07:27:100
96372570,3sleep08838-21/usr/sbin/munin07:27:100
195102540,2chrt19511-21missed_timers10:47:090
195102540,2chrt19511-21missed_timers10:47:090
195102540,2chrt19511-21missed_timers10:47:090
155862480,2chrt351rcuc/207:42:162
155862480,2chrt351rcuc/207:42:162
192572460,3sleep20-21swapper/212:12:132
192572460,3sleep20-21swapper/212:12:132
28132440,2sleep02815-21fschecks_count08:37:050
28132440,2sleep02815-21fschecks_count08:37:050
31942430,3sleep00-21swapper/011:31:550
31942430,3sleep00-21swapper/011:31:550
31942430,3sleep00-21swapper/011:31:550
3384994231,8cyclictest28024-21cron11:11:530
3384994231,8cyclictest28024-21cron11:11:530
296012410,4sleep30-21swapper/308:22:043
296012410,4sleep30-21swapper/308:22:043
236552400,3chrt0-21swapper/210:57:122
236552400,3chrt0-21swapper/210:57:122
236552400,3chrt0-21swapper/210:57:122
180542400,3sleep0201rcuc/010:42:150
180542400,3sleep0201rcuc/010:42:150
180542400,3sleep0201rcuc/010:42:150
3384993830,6cyclictest3382-21cyclictest11:42:140
3384993830,6cyclictest3382-21cyclictest11:42:140
338899371,29cyclictest0-21swapper/209:54:142
338899371,29cyclictest0-21swapper/209:54:142
338899351,28cyclictest0-21swapper/209:07:432
338899351,28cyclictest0-21swapper/209:07:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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