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2023-12-04 - 04:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 here to display the system's profile data or here to proceed to next system.
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 20 highest latencies:
System rack9slot3s.osadl.org (updated Mon Dec 04, 2023 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
105491610,38ptp4l0-21swapper/019:05:230
105491590,39ptp4l0-21swapper/119:08:281
453125042,6sleep20-21swapper/219:09:472
429025046,2sleep30-21swapper/319:06:403
105491180,0ptp4l0-21swapper/122:00:201
105491180,0ptp4l0-21swapper/023:35:210
105491170,0ptp4l0-21swapper/219:50:332
105491170,0ptp4l0-21swapper/023:10:300
105491160,1ptp4l28494-21apt-get22:10:170
105491160,1ptp4l26215-21apt-get23:15:020
105491160,1ptp4l23201-21snmp_o5powerctl19:40:311
105491160,1ptp4l13446-21apt-get23:55:240
105491160,1ptp4l13446-21apt-get23:55:240
105491160,1ptp4l12001-21snmp_o5powerctl20:20:290
105491160,0ptp4l0-21swapper/022:55:290
105491160,0ptp4l0-21swapper/020:39:040
105491150,2ptp4l0-21swapper/023:24:100
105491150,1ptp4l7278-21/usr/sbin/munin22:35:320
105491150,1ptp4l3749-21ntp_states20:05:290
105491150,1ptp4l32134-21apt-get20:00:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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