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2024-04-19 - 22:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Fri Apr 19, 2024 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
528499491,36cyclictest0-21swapper/008:25:160
528499491,36cyclictest0-21swapper/008:25:160
5314994730,12cyclictest26866irq/58-eth009:55:133
528499472,42cyclictest10192-21apt-get07:15:150
530699461,27cyclictest12130-21ssh09:45:142
529599462,35cyclictest30455-21ssh09:15:151
528499463,39cyclictest18633-21ssh10:10:150
528499461,41cyclictest5441-21apt-get07:10:120
528499450,34cyclictest29527-21/usr/sbin/munin07:35:190
528499443,38cyclictest0-21swapper/007:55:130
528499441,38cyclictest14970-21apt-get07:20:160
5295994320,4cyclictest21-21ksoftirqd/111:40:141
528499432,37cyclictest21659-21apt-get08:35:120
528499432,36cyclictest19698-21apt-get09:50:130
528499431,28cyclictest9696-21/usr/sbin/munin07:45:240
5314994225,12cyclictest26866irq/58-eth011:00:163
5295994220,16cyclictest21-21ksoftirqd/109:50:141
529599420,28cyclictest21-21ksoftirqd/109:25:131
528499420,30cyclictest12019-21cat12:10:230
531499414,21cyclictest26866irq/58-eth009:00:153
531499411,26cyclictest26866irq/58-eth009:35:123
528499412,36cyclictest8404-21apt-get08:55:140
528499411,36cyclictest27786-21apt-get11:20:160
528499411,23cyclictest31251-21ntp_192.168.11409:55:260
528499410,35cyclictest31292-21apt-get08:45:150
528499401,35cyclictest19302-21apt-get11:15:130
528499400,35cyclictest12120-21apt-get09:45:140
531499393,23cyclictest26866irq/58-eth007:35:143
528499392,25cyclictest27885-21sh12:00:160
5284993920,14cyclictest12-21ksoftirqd/008:15:150
528499391,31cyclictest0-21swapper/011:45:160
528499391,26cyclictest16224-21unixbench_singl11:50:330
528499391,23cyclictest0-21swapper/011:13:040
528499390,26cyclictest22504-21diskmemload10:35:560
531499384,22cyclictest26866irq/58-eth012:35:153
528499381,32cyclictest0-21swapper/009:25:140
528499381,24cyclictest10522-21ssh10:26:470
528499380,35cyclictest20494-21apt-get11:35:150
528499380,23cyclictest29093-21ssh10:19:540
530699372,18cyclictest27294-21ssh11:19:562
528499371,31cyclictest1722-21apt-get12:25:130
528499371,31cyclictest0-21swapper/008:10:140
528499371,26cyclictest30443-21apt-get09:15:150
528499371,21cyclictest19751-21diskstats10:55:160
528499370,26cyclictest3504-21if_eth010:00:180
528499370,21cyclictest5017-21ntp_192.168.11407:40:260
528499370,21cyclictest28868-21ntp_192.168.11408:05:270
529599363,22cyclictest19199-21ssh12:15:161
529599361,29cyclictest27213-21ssh11:00:161
528499362,31cyclictest3898-21ssh10:45:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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