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2024-07-16 - 15:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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 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: 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 rack2slot7s.osadl.org (updated Tue Jul 16, 2024 12:42:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
961691996353,7cyclictest1108172-21unin-run11:50:001
961691996353,7cyclictest1108172-21unin-run11:50:001
961690996241,11cyclictest12550irq/32-eth008:06:080
961690995931,23cyclictest134285-21cups-browsed11:18:480
961690995931,23cyclictest134285-21cups-browsed11:18:480
961690995627,19cyclictest151ktimers/009:51:100
961692995550,2cyclictest0-21swapper/210:11:152
961690995541,11cyclictest1046539-21munin-run10:20:000
961692995244,5cyclictest979021-21systemd-run08:05:012
96169199473,39cyclictest1011107-21ssh09:26:111
961690994733,11cyclictest977446-21systemd-run08:00:000
961692994638,5cyclictest1129420-21awk12:20:002
96169199462,37cyclictest1024642-21ssh09:46:381
96169099464,35cyclictest1011135-21sh09:26:120
961690994635,8cyclictest1036257-21ssh10:05:010
96169099462,38cyclictest1061781-21ssh10:41:190
961691994530,11cyclictest134285-21cups-browsed10:39:221
961690994535,8cyclictest1101227-21/usr/sbin/munin11:40:020
961690994535,8cyclictest1101227-21/usr/sbin/munin11:40:020
961690994532,9cyclictest12550irq/32-eth011:31:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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