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2025-12-23 - 14:33

OSADL QA Farm on Real-time of Mainline Linux

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

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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  Phytec
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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 20 highest latencies:
System rackbslot5s.osadl.org (updated Tue Dec 23, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1366466995124,10cyclictest1429595-21/usr/sbin/munin22:10:153
1366466995120,10cyclictest1394800-21dpkg20:30:013
1366458995036,11cyclictest231ktimers/120:25:111
1366458995036,11cyclictest231ktimers/120:25:101
1366453994941,4cyclictest1370394-21cut19:20:010
1366462994735,8cyclictest1442892-21auditctl22:50:002
1366466994529,11cyclictest1440266-21/usr/sbin/munin22:40:203
1366462994535,6cyclictest1393186-21cut20:25:152
1366462994535,6cyclictest1393186-21cut20:25:152
1366453994535,6cyclictest1467445-21fschecks_time00:00:190
1366466994432,8cyclictest391ktimers/300:10:113
1366466994429,11cyclictest1443691-21/usr/sbin/munin22:50:213
1366466994428,11cyclictest1450290-21/usr/sbin/munin23:10:203
1366466994423,16cyclictest1366726-21df_inode19:10:143
1366453994433,7cyclictest1388966-21grep20:10:270
1366466994333,7cyclictest1460195-21apt-get23:40:143
1366466994328,10cyclictest1414445-21/usr/sbin/munin21:25:213
1366466994327,11cyclictest0-21swapper/322:55:143
1366462994334,6cyclictest1388968-21unixbench_singl20:10:272
1366466994233,6cyclictest391ktimers/323:25:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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