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2024-11-22 - 05:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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 50 highest latencies:
System rackeslot5s.osadl.org (updated Fri Nov 22, 2024 00:44:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
932499270,1cyclictest30671-21perf00:20:002
9324992522,3cyclictest15391-21apt-get22:40:392
9318992522,2cyclictest28507-21cron19:50:000
932599240,1cyclictest30616-21idleruntime-cro21:00:003
932499240,20cyclictest0-21swapper/223:15:392
9321992422,1cyclictest7097-21munin-run22:25:001
9325992321,1cyclictest20200-21munin-run20:40:003
932599230,22cyclictest9567-21apt-get19:10:383
932499230,22cyclictest3381-21perf20:05:002
932499230,0cyclictest12972-21apt-get22:35:392
932199230,2cyclictest20204-21sendmail-msp00:00:001
932199230,22cyclictest948-21apt20:00:001
931899230,22cyclictest15075-21apt22:40:000
931899230,1cyclictest21309-21latency_hist19:35:010
9325992220,1cyclictest0-21swapper/323:00:003
932599220,21cyclictest969-21awk20:00:003
932599220,21cyclictest5464-21munin-run00:35:003
932599220,21cyclictest27388-21apt-get23:05:413
932599220,21cyclictest20583-21apt-get00:00:383
932599220,21cyclictest0-21swapper/321:30:433
932599220,21cyclictest0-21swapper/320:25:013
932599220,1cyclictest587-21munin-run21:05:003
932599220,1cyclictest4665-21perf22:20:003
9324992219,3cyclictest9486-21apt-get22:30:022
9321992220,1cyclictest4729-21dump-pmu-power23:25:001
9321992220,1cyclictest4729-21dump-pmu-power23:25:001
9321992220,1cyclictest31875-21awk22:10:001
9321992220,1cyclictest27783-21munin-run20:55:001
9321992220,1cyclictest24659-21cron23:00:001
9321992219,2cyclictest27085-21latency_hist23:05:001
932199220,21cyclictest22587-21perf20:45:001
932199220,21cyclictest17449-21munin-plugin-st21:40:001
932199220,21cyclictest12937-21apt-get21:30:431
932199220,21cyclictest12271-21latency_hist22:35:001
932199220,21cyclictest0-21swapper/100:00:381
932199220,1cyclictest8464-21apt-get20:15:401
932199220,1cyclictest19846-21idleruntime-cro21:45:001
9318992220,1cyclictest5454-21awk00:35:000
9318992219,2cyclictest7876-21perf00:40:000
931899220,21cyclictest31271-21apt-get19:55:380
931899220,21cyclictest19895-21perf22:50:010
931899220,0cyclictest24037-21apt-get19:40:410
931899220,0cyclictest2281-21perf22:15:000
9325992120,1cyclictest20185-21apt-get22:50:423
9325992120,1cyclictest18081-21apt-get23:55:383
9325992119,1cyclictest22226-21turbostat21:50:003
932599210,20cyclictest947-21apt-get00:25:403
932599210,20cyclictest5715-21apt-get21:15:393
932599210,20cyclictest24929-21apt-get21:55:373
932599210,20cyclictest1268-21apt-get20:00:403
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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