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2024-10-06 - 23:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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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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 rackcslot8s.osadl.org (updated Sun Oct 06, 2024 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
132091770,29ptp4l0-21swapper/107:05:221
199526252,6sleep60-21swapper/607:05:366
9652610,0sleep40-21swapper/410:40:014
132091610,30ptp4l0-21swapper/007:09:570
202502590,0sleep50-21swapper/510:22:555
123312570,0sleep10-21swapper/110:54:071
12072570,0sleep60-21swapper/610:40:116
58625633,17sleep70-21swapper/707:05:127
244852550,0sleep00-21swapper/011:10:010
132091550,5ptp4l0-21swapper/507:08:345
284362530,0sleep60-21swapper/611:56:456
129725332,7sleep40-21swapper/407:05:184
215225139,7sleep20-21swapper/207:07:332
215324836,7sleep30-21swapper/307:07:333
132091320,0ptp4l121rcu_preempt09:52:581
132091320,0ptp4l0-21swapper/511:41:325
132091320,0ptp4l0-21swapper/011:10:210
132091310,2ptp4l19325-21rm10:20:281
132091310,0ptp4l0-21swapper/510:45:215
132091310,0ptp4l0-21swapper/109:33:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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