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2025-11-18 - 14:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Tue Nov 18, 2025 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19009224352196,96sleep00-21swapper07:06:360
194389916515,24cyclictest23830-21apt-get07:32:010
194389916018,119cyclictest12914-21df_inode09:45:330
194389915911,123cyclictest30218-21mailstats08:10:590
19438991588,124cyclictest7634-21apt-get09:16:550
194389915817,116cyclictest26817-21diskstats11:10:310
19438991578,122cyclictest10675-21grep09:30:490
194389915730,19cyclictest29927-21/usr/sbin/munin11:30:100
194389915719,114cyclictest633-21apt-get11:51:340
194389915717,115cyclictest5459-21diskstats09:00:350
194389915714,26cyclictest7399-21/usr/sbin/munin12:31:070
194389915617,112cyclictest575-21apt-get11:47:240
194389915616,114cyclictest25221-21diskstats11:00:340
194389915535,21cyclictest25448-21/usr/sbin/munin07:40:580
194389915516,23cyclictest22995-21munin-run07:30:040
194389915515,117cyclictest23158-21apt-get10:50:370
194389915515,116cyclictest24389-21df10:55:340
194389915514,117cyclictest6033-21cat12:20:440
194389915513,118cyclictest5791-21cat12:20:050
194389915428,92cyclictest31411-21cron11:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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