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2026-06-15 - 14:01

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 Mon Jun 15, 2026 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4262840,2chrt425-21grep07:23:150
260452810,8sleep0171ktimers/010:23:090
260452810,8sleep0171ktimers/010:23:090
62432800,1sleep06245-21latency_hist10:58:020
62432800,1sleep06245-21latency_hist10:58:020
229692640,3sleep021942-21/usr/sbin/munin08:23:170
229692640,3sleep021942-21/usr/sbin/munin08:23:170
60292590,1sleep3431rcuc/312:23:083
60292590,1sleep3431rcuc/312:23:083
10592570,3chrt0-21swapper/210:43:092
162922550,3sleep30-21swapper/308:08:043
162922550,3sleep30-21swapper/308:08:043
47872540,4sleep00-21swapper/010:53:080
47872540,4sleep00-21swapper/010:53:080
311852530,3sleep00-21swapper/012:03:110
311852530,3sleep00-21swapper/012:03:110
311852530,3sleep00-21swapper/012:03:110
28496995328,5cyclictest29484-21fschecks_count10:33:070
28496995328,5cyclictest29484-21fschecks_count10:33:070
273652530,2chrt0-21swapper/008:37:560
273652530,2chrt0-21swapper/008:37:560
233362470,3chrt0-21swapper/211:43:072
233362470,3chrt0-21swapper/211:43:072
233362470,3chrt0-21swapper/211:43:072
46182410,2sleep30-21swapper/310:53:073
46182410,2sleep30-21swapper/310:53:073
112782410,8sleep0171ktimers/007:53:100
112782410,8sleep0171ktimers/007:53:100
193092380,2sleep119423-21bingrep09:58:101
193092380,2sleep119423-21bingrep09:58:101
193092380,2sleep119423-21bingrep09:58:101
28496993730,5cyclictest4246-21latency_hist09:02:540
28496993730,5cyclictest4246-21latency_hist09:02:540
28496993631,3cyclictest31065-21cat08:47:540
28496993631,3cyclictest31065-21cat08:47:540
37802330,3chrt0-21swapper/007:33:080
37802330,3chrt0-21swapper/007:33:080
37802330,3chrt0-21swapper/007:33:080
28500993325,6cyclictest24532-21processes10:18:101
28500993322,8cyclictest700-21192.168.115.40-manager07:50:081
28500993322,8cyclictest700-21192.168.115.40-manager07:50:081
28496993328,4cyclictest384-21cron10:42:550
28496993328,4cyclictest384-21cron10:42:550
28496993328,4cyclictest384-21cron10:42:550
28500993225,5cyclictest31150-21/usr/sbin/munin10:38:051
28500993225,5cyclictest31150-21/usr/sbin/munin10:38:051
28496993225,5cyclictest28494-21cyclictest09:07:200
28496993225,5cyclictest28494-21cyclictest09:07:200
28496993225,5cyclictest17164-21sendmail_mailqu09:48:110
28496993225,5cyclictest17164-21sendmail_mailqu09:48:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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