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2023-06-02 - 21:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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 
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x86 Intel Core i5-1135G7 @2400 MHz, Linux 5.15.21-rt30 (Profile)

Latency plot of shadow in rack #b, slot #8
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rackbslot8s (updated Fri Jun 02, 2023 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15579992123109,9sleep10-21swapper/107:08:591
15578702122108,9sleep40-21swapper/407:07:104
15580032118103,10sleep50-21swapper/507:09:035
1557902211392,16sleep70-21swapper/707:07:377
1558038211298,9sleep20-21swapper/207:09:322
1557998211097,9sleep00-21swapper/007:08:580
1557759210979,10sleep30-21swapper/307:05:333
1557901210894,9sleep60-21swapper/607:07:366
1558323991020,102cyclictest0-21swapper/709:10:417
15583099910299,3cyclictest547-21snmpd08:59:323
1558295991020,99cyclictest1619961-21diskmemload10:29:320
15583199910199,2cyclictest547-21snmpd12:26:126
15583199910199,2cyclictest547-21snmpd09:25:186
15583199910199,2cyclictest547-21snmpd08:30:016
15583199910199,2cyclictest547-21snmpd08:10:586
15583199910198,3cyclictest1610450-21cat08:50:216
1558319991010,101cyclictest0-21swapper/609:37:436
1558319991010,100cyclictest0-21swapper/607:22:116
15583159910199,2cyclictest547-21snmpd12:34:165
15583159910199,2cyclictest547-21snmpd10:44:215
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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