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2024-10-09 - 06:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 50 highest latencies:
System rackeslot4s.osadl.org (updated Wed Oct 09, 2024 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
796170994238,3cyclictest936452-21kworker/u8:3+flush-259:021:25:183
796164994136,3cyclictest801473-21cp19:15:001
796170993934,3cyclictest1077996-21/usr/sbin/munin23:40:143
796164993529,4cyclictest910940-21latency_hist21:00:001
796160993328,4cyclictest904930-21ntpq20:50:240
796164993126,4cyclictest1015718-21diskstats22:40:131
796170993026,3cyclictest1052109-21kworker/u8:1+flush-259:023:30:003
796167993026,3cyclictest796339-21kworker/u8:0+flush-259:019:15:242
796167993025,4cyclictest952206-21kworker/u8:1+events_unbound22:25:202
796164993026,3cyclictest1052109-21kworker/u8:1+flush-259:023:20:001
796170992924,3cyclictest2304165-21systemd-journal23:05:143
796167992923,4cyclictest962938-21latency_hist21:50:012
796170992824,3cyclictest1036627-21apt-get23:00:113
796167992824,3cyclictest837336-21kworker/u8:3+flush-259:020:50:272
796167992821,5cyclictest2304165-21systemd-journal20:55:142
796164992825,2cyclictest817234-21kworker/u8:3+flush-259:019:40:011
796160992823,4cyclictest827828-21apt-get19:40:130
796160992823,4cyclictest2304165-21systemd-journal19:50:140
796160992822,4cyclictest915272-21ntpq21:00:190
796167992723,3cyclictest936452-21kworker/u8:3+events_unbound21:50:212
796167992723,3cyclictest796339-21kworker/u8:0+events_unbound19:25:152
796167992722,3cyclictest1031229-21kworker/u8:2+events_unbound23:01:162
796160992723,3cyclictest989410-21apt-get22:15:110
796160992721,4cyclictest879990-21latency_hist20:30:000
796170992621,3cyclictest2304165-21systemd-journal23:30:153
796167992623,2cyclictest796339-21kworker/u8:0+flush-259:019:45:182
796167992622,3cyclictest890307-21kworker/u8:1+events_unbound21:10:122
796167992622,3cyclictest1040493-21kworker/u8:0+events_unbound23:50:132
79616799260,24cyclictest1-21systemd22:06:142
796160992622,3cyclictest1040493-21kworker/u8:0+flush-259:000:10:150
796170992518,5cyclictest947071-21latency_hist21:35:013
796167992521,3cyclictest503-21systemd-logind19:25:012
796164992520,3cyclictest509-21rs:main1
796160992519,4cyclictest1107936-21ntpq00:05:230
796170992419,3cyclictest890307-21kworker/u8:1+flush-259:020:55:173
796167992420,3cyclictest859249-21apt-get20:10:132
796164992419,3cyclictest936452-21kworker/u8:3+flush-259:021:25:261
79616099240,22cyclictest492-21dbus-daemon23:00:010
796170992320,2cyclictest958006-21kworker/u8:2+events_unbound22:00:163
796167992316,5cyclictest1015484-21cat22:40:012
796164992321,1cyclictest1041225-21fwupd23:01:461
796164992319,3cyclictest2304165-21systemd-journal21:15:001
796164992318,4cyclictest2304165-21systemd-journal23:00:001
796170992216,4cyclictest1098447-21latency_hist00:00:003
796167992219,2cyclictest837870-21kworker/u8:4+events_unbound20:07:152
796167992218,3cyclictest936452-21kworker/u8:3+flush-259:022:10:262
796167992218,3cyclictest837870-21kworker/u8:4+events_unbound19:55:242
796167992216,4cyclictest916113-21kworker/u8:2+events_unbound21:15:112
796167992216,4cyclictest2304165-21systemd-journal23:29:142
796164992219,2cyclictest767632-21kworker/u8:1+flush-259:020:20:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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