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2026-07-02 - 10:53

OSADL QA Farm on Real-time of Mainline Linux

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

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.
Unexpectedly long latencies may be caused by SMIs
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 20 highest latencies:
System rack2slot7s.osadl.org (updated Thu Jul 02, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210390099533,39cyclictest2164927-21/usr/sbin/munin21:50:240
2103902995242,4cyclictest0-21swapper/220:20:382
210390299482,40cyclictest2164934-21ssh21:50:242
2103901994823,18cyclictest265-21systemd-journal19:52:221
2103902994637,4cyclictest0-21swapper/222:20:342
2103901994635,8cyclictest2214773-21proc_pri23:10:451
210390199461,34cyclictest2220728-21ssh23:20:361
2103900994532,10cyclictest2136884-21munin-plugin-st21:00:010
2103902994437,3cyclictest0-21swapper/220:40:452
2103902994333,7cyclictest2256323-21idleruntime-cro00:20:002
2103902994333,6cyclictest2149840-21/usr/sbin/munin21:25:282
2103902994234,5cyclictest2114422-21systemd-run19:45:022
2103901994235,4cyclictest2146061-21awk21:20:011
2103901994235,4cyclictest2105394-21munin-plugin-st19:15:001
2103901994232,7cyclictest2149183-21systemd-run21:25:021
2103901994232,7cyclictest2149183-21systemd-run21:25:021
2103902994132,6cyclictest2208203-21if_wlan023:00:312
2103902994132,6cyclictest2120515-21latency_hist20:05:022
2103902994125,12cyclictest2162076-21cpu21:45:252
2103901994133,5cyclictest2158850-21aten_r2power_en21:40:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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