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2026-06-03 - 07:33

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 Wed Jun 03, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2794321080,3sleep00-21swapper/022:57:540
175392830,2sleep017537-21perl21:02:570
175392830,2sleep017537-21perl21:02:570
175392830,2sleep017537-21perl21:02:570
198792730,3sleep30-21swapper/300:02:553
198792730,3sleep30-21swapper/300:02:553
287162690,10sleep0171ktimers/021:33:040
287162690,10sleep0171ktimers/021:33:040
287162690,10sleep0171ktimers/021:33:040
44222670,4chrt4423-21grep20:27:560
44222670,4chrt4423-21grep20:27:560
272972610,3chrt0-21swapper/221:28:002
272972610,3chrt0-21swapper/221:28:002
272972610,3chrt0-21swapper/221:28:002
121712530,2chrt12168-21timerwakeupswit22:13:051
121712530,2chrt12168-21timerwakeupswit22:13:051
121712530,2chrt12168-21timerwakeupswit22:13:051
154042490,2sleep10-21swapper/120:57:531
154042490,2sleep10-21swapper/120:57:531
64412470,3sleep00-21swapper/020:32:580
64412470,3sleep00-21swapper/020:32:580
302852450,3sleep30-21swapper/320:08:093
302852450,3sleep30-21swapper/320:08:093
113732450,3sleep00-21swapper/023:38:030
113732450,3sleep00-21swapper/023:38:030
113732450,3sleep00-21swapper/023:38:030
1260099431,17cyclictest19746-21cut00:02:471
1260099431,17cyclictest19746-21cut00:02:471
1260099431,17cyclictest19746-21cut00:02:471
12600994215,4cyclictest10964-21latency_hist22:12:491
12600994215,4cyclictest10964-21latency_hist22:12:491
12600994215,4cyclictest10964-21latency_hist22:12:491
308402400,1sleep00-21swapper/023:03:050
308402400,1sleep00-21swapper/023:03:050
308402400,1sleep00-21swapper/023:03:050
261242390,2sleep30-21swapper/300:18:033
261242390,2sleep30-21swapper/300:18:033
261242390,2sleep30-21swapper/300:18:033
197282390,2sleep119732-21ls19:42:501
197282390,2sleep119732-21ls19:42:501
197282390,2sleep119732-21ls19:42:501
12600993917,3cyclictest18809-21cut22:32:561
12600993917,3cyclictest18809-21cut22:32:561
12593993928,5cyclictest21337-21latency_hist19:47:420
12593993928,5cyclictest21337-21latency_hist19:47:420
12600993817,2cyclictest0-21swapper/119:57:561
12600993817,2cyclictest0-21swapper/119:57:561
140332370,3sleep20-21swapper/222:18:052
140332370,3sleep20-21swapper/222:18:052
12600993629,4cyclictest0-21swapper/100:02:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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