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2025-02-06 - 14:50

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 Thu Feb 06, 2025 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
753361994438,4cyclictest769055-21kworker/u8:1+flush-259:019:50:203
753354994438,4cyclictest1956849-21systemd-journal20:01:541
753350994338,4cyclictest940465-21kworker/u8:3+flush-259:022:40:010
753361993528,5cyclictest897120-21latency_hist21:35:003
753361993528,5cyclictest838037-21latency_hist20:35:013
753356993530,4cyclictest769587-21getprofile19:26:032
753354993529,4cyclictest1956849-21systemd-journal20:46:491
753350993533,1cyclictest769568-21lspci19:26:030
753350993327,4cyclictest924168-21kworker/u8:0+flush-259:022:15:010
753361993228,3cyclictest848355-21kworker/u8:3+events_unbound20:50:173
753356993228,3cyclictest1015697-21cat00:00:002
753350993228,3cyclictest907037-21kworker/u8:3+events_unbound21:54:560
753350993226,4cyclictest1956849-21systemd-journal00:13:030
753350993226,4cyclictest1956849-21systemd-journal00:13:030
753361993126,3cyclictest939613-21kworker/u8:0+events_unbound22:35:153
753356993127,3cyclictest763823-21kworker/u8:4+flush-259:019:50:002
753356993125,4cyclictest965740-21ntpq22:55:192
753361993025,4cyclictest1956849-21systemd-journal20:25:003
753354993024,4cyclictest885893-21apt-get21:20:111
753350993027,2cyclictest885858-21kworker/u8:2+flush-259:022:15:150
753350993026,3cyclictest978226-21kworker/u8:0+events_unbound00:05:010
753361992926,2cyclictest972401-21kworker/u8:3+flush-259:023:10:003
753354992925,3cyclictest929548-21/usr/sbin/munin22:15:251
753354992924,4cyclictest807396-21apt-get20:05:121
753350992923,4cyclictest1014651-21ntpq23:55:240
753354992823,3cyclictest1956849-21systemd-journal22:09:551
753354992822,4cyclictest1016177-21/usr/sbin/munin00:00:141
753350992824,3cyclictest994447-21kworker/u8:1+events_unbound23:44:050
753350992824,3cyclictest966593-21kworker/u8:2+events_unbound23:10:560
753350992823,3cyclictest769055-21kworker/u8:1+events_unbound19:40:500
753350992823,3cyclictest769055-21kworker/u8:1+events_unbound19:40:500
753350992822,4cyclictest854371-21diskstats20:50:130
753354992724,2cyclictest763823-21kworker/u8:4+events_unbound19:20:191
753354992719,6cyclictest891911-21latency_hist21:30:001
753350992723,3cyclictest989030-21kworker/u8:4+events_unbound23:37:240
753350992723,3cyclictest978226-21kworker/u8:0+events_unbound00:23:050
753350992722,4cyclictest763823-21kworker/u8:4+flush-259:019:36:500
753361992622,3cyclictest885858-21kworker/u8:2+flush-259:022:10:003
753361992621,3cyclictest978226-21kworker/u8:0+flush-259:023:20:003
753356992620,4cyclictest763857-21apt-get19:20:132
753356992619,5cyclictest902277-21latency_hist21:40:002
75335499264,10cyclictest799743-21cut19:55:191
753350992622,3cyclictest806836-21kworker/u8:0+events_unbound20:32:510
753350992621,4cyclictest978226-21kworker/u8:0+events_unbound00:37:040
753350992621,2cyclictest978226-21kworker/u8:0+events_unbound00:35:010
753361992520,3cyclictest854177-21kworker/u8:4+events_unbound21:00:023
753361992518,5cyclictest811384-21ntpq20:05:203
753356992519,5cyclictest854177-21kworker/u8:4+events_unbound20:50:152
753350992522,2cyclictest812527-21kworker/u8:3+flush-259:020:15:210
753350992521,3cyclictest994447-21kworker/u8:1+events_unbound00:16:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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