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2024-11-23 - 17:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #2

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 20 highest latencies:
System rack0slot2s.osadl.org (updated Sat Nov 23, 2024 12:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
108468199444442,2cyclictest1991708-21gnome-shell10:00:598
108467199431430,1cyclictest1352-21snmpd07:55:115
108466799431430,1cyclictest173-21hwrng12:05:234
108467199429427,1cyclictest1352-21snmpd10:08:435
108467799426425,1cyclictest1352-21snmpd09:28:567
108468399424424,0cyclictest1109027-21kworker/9:2+pm08:46:139
108467399421420,1cyclictest1352-21snmpd08:35:136
108467399421420,1cyclictest1352-21snmpd08:30:336
108468199391391,0cyclictest1991708-21gnome-shell07:11:598
108465299388386,2cyclictest1991708-21gnome-shell08:14:590
108466399382382,0cyclictest58550irq/143-i91511:27:433
108466399382382,0cyclictest58550irq/143-i91509:50:443
108466399382381,1cyclictest58550irq/143-i91508:35:593
108466399381381,0cyclictest58550irq/143-i91512:22:443
108466399381381,0cyclictest58550irq/143-i91511:37:423
108466399381381,0cyclictest58550irq/143-i91511:08:443
108466399381381,0cyclictest58550irq/143-i91510:49:593
108466399381381,0cyclictest58550irq/143-i91510:23:453
108466399381381,0cyclictest58550irq/143-i91510:18:233
108466399381381,0cyclictest58550irq/143-i91510:06:433
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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