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2026-05-11 - 11:59

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Mon May 11, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194602232164,56sleep20-21swapper/219:05:322
197502203167,24sleep30-21swapper/319:09:213
195532202166,24sleep10-21swapper/119:06:441
194982201163,25sleep00-21swapper/019:06:040
19901995653,2cyclictest0-21swapper/200:32:292
19901995551,3cyclictest0-21swapper/220:27:332
72352500,3sleep30-21swapper/321:05:173
158522490,2sleep121-21rcuc/123:50:251
1988999382,25cyclictest21156-21kworker/0:219:15:280
1990699337,3cyclictest0-21swapper/322:47:273
1988999321,10cyclictest12974-21kworker/0:221:22:570
1989599314,18cyclictest13662-21sshd23:45:271
1988999312,22cyclictest28173-21kworker/0:221:57:420
1990699304,4cyclictest0-21swapper/322:54:453
1990199307,3cyclictest0-21swapper/223:51:002
1990699298,3cyclictest0-21swapper/323:08:493
1990699296,3cyclictest0-21swapper/322:28:453
1990699296,3cyclictest0-21swapper/322:28:453
1990699291,25cyclictest7279-21/usr/sbin/munin19:50:233
1990199297,3cyclictest0-21swapper/222:09:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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