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2024-07-27 - 03:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot3s.osadl.org (updated Fri Jul 26, 2024 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
931875998825,32cyclictest944832-21latency_hist11:25:022
93186799841,3cyclictest0-21swapper/008:10:020
931867997974,3cyclictest0-21swapper/007:45:020
931867996832,32cyclictest944046-21cron11:09:590
93187599672,13cyclictest940714-21sshd10:00:192
93187599662,7cyclictest941215-21sshd10:11:172
931867996643,20cyclictest0-21swapper/012:10:020
93187599651,13cyclictest944536-21sshd11:17:182
93187599651,13cyclictest944536-21sshd11:17:182
93187599642,8cyclictest944306-21munin-run11:15:002
931875996413,45cyclictest275-21dbus-daemon11:00:012
931875996326,33cyclictest944056-21latency_hist11:10:012
93187599632,5cyclictest938960-21munin-run09:30:002
93187599632,5cyclictest938960-21munin-run09:30:002
93187599632,13cyclictest938695-21sshd09:24:182
93187599631,6cyclictest948362-21sshd12:30:182
931875996314,44cyclictest237-21systemd-journal10:45:012
93187599622,15cyclictest945620-21munin-run11:40:022
93187599621,11cyclictest942497-21sshd10:38:192
93187599612,7cyclictest939988-21munin-run09:50:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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