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2025-04-03 - 23:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 100 highest latencies:
System rackeslot5s.osadl.org (updated Thu Apr 03, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63099260,25cyclictest1-21systemd23:00:000
63499250,24cyclictest18206-21apt-get23:27:031
641992422,1cyclictest34-21ksoftirqd/320:10:013
63499240,23cyclictest25847-21apt-get20:02:071
63499240,23cyclictest20617-21latency_hist19:49:591
63799230,22cyclictest5848-21perf19:20:002
634992321,1cyclictest7868-21awk20:30:001
634992321,1cyclictest5844-21dpkg19:20:011
634992321,1cyclictest26231-21munin-run22:25:001
63499230,2cyclictest23023-21grep19:54:591
63499230,22cyclictest5458-21sh20:25:011
630992323,0cyclictest0-21swapper/023:22:000
630992321,1cyclictest13482-21apt-get20:42:080
63099230,22cyclictest14517-21sleep00:40:000
64199220,21cyclictest593-21dbus-daemon00:20:013
64199220,21cyclictest0-21swapper/323:12:073
64199220,21cyclictest0-21swapper/321:42:053
64199220,21cyclictest0-21swapper/321:22:093
64199220,21cyclictest0-21swapper/321:02:083
64199220,21cyclictest0-21swapper/320:27:063
64199220,21cyclictest0-21swapper/300:35:003
637992220,1cyclictest31710-21perf22:40:012
63799220,21cyclictest25434-21perf20:00:002
63799220,21cyclictest1727-21awk22:45:012
63799220,21cyclictest15812-21perf19:40:002
63799220,21cyclictest13347-21apt-get21:52:062
63799220,21cyclictest0-21swapper/220:47:052
63799220,21cyclictest0-21swapper/200:32:072
634992221,1cyclictest0-21swapper/123:42:051
634992220,1cyclictest31111-21cron00:00:001
63499220,2cyclictest6657-21apt-get19:22:051
63499220,21cyclictest9567-21munin-run23:05:001
63499220,21cyclictest12367-21apt-get23:12:091
63499220,1cyclictest593-21dbus-daemon22:00:011
630992220,1cyclictest593-21dbus-daemon23:19:590
630992220,1cyclictest3035-21cron20:20:010
630992220,1cyclictest25642-21munin-run23:45:000
63099220,21cyclictest23077-21apt-get21:02:090
63099220,21cyclictest0-21swapper/022:12:100
63099220,21cyclictest0-21swapper/021:52:070
63099220,21cyclictest0-21swapper/020:47:050
63099220,21cyclictest0-21swapper/019:42:070
63099220,1cyclictest30217-21sh21:15:000
641992120,1cyclictest9474-21apt-get00:27:073
641992119,1cyclictest7844-21apt-get20:30:013
641992119,1cyclictest22668-21munin-run21:00:003
64199210,21cyclictest0-21swapper/323:27:043
64199210,21cyclictest0-21swapper/300:07:053
64199210,20cyclictest3491-21apt-get20:22:073
64199210,20cyclictest30705-21apt-get21:17:063
64199210,20cyclictest10956-21apt-get21:47:063
64199210,20cyclictest0-21swapper/321:10:013
64199210,20cyclictest0-21swapper/320:47:053
64199210,20cyclictest0-21swapper/319:52:053
64199210,1cyclictest29035-21apt-get22:32:103
637992121,0cyclictest20662-21apt-get20:57:062
63799210,21cyclictest0-21swapper/223:02:002
63799210,20cyclictest31078-21apt-get20:12:042
63799210,20cyclictest25465-21apt-get21:07:062
63799210,20cyclictest16397-21apt-get22:02:002
63799210,20cyclictest1062-21apt-get20:17:062
63799210,20cyclictest0-21swapper/221:42:042
63799210,0cyclictest0-21swapper/220:07:022
63799210,0cyclictest0-21swapper/200:22:032
634992121,0cyclictest4025-21apt-get00:12:081
634992121,0cyclictest29035-21apt-get22:32:081
634992121,0cyclictest0-21swapper/123:32:051
634992121,0cyclictest0-21swapper/121:52:071
634992120,0cyclictest5508-21apt-get21:32:061
634992119,1cyclictest3435-21perf19:14:591
63499210,21cyclictest2129-21apt-get22:47:041
63499210,20cyclictest0-21swapper/120:57:071
63499210,20cyclictest0-21swapper/119:42:081
63499210,0cyclictest11445-21apt-get19:32:051
63499210,0cyclictest0-21swapper/100:27:061
630992121,0cyclictest0-21swapper/023:52:070
630992121,0cyclictest0-21swapper/000:27:060
630992120,1cyclictest0-21swapper/019:32:050
630992119,1cyclictest3412-21sh19:15:000
630992119,1cyclictest18793-21apt-get22:07:040
63099210,21cyclictest0-21swapper/023:07:040
63099210,21cyclictest0-21swapper/021:22:080
63099210,21cyclictest0-21swapper/020:07:030
63099210,20cyclictest31120-21latency_hist00:00:010
63099210,20cyclictest0-21swapper/000:32:060
63099210,1cyclictest7872-21munin-run20:29:590
63099210,0cyclictest30206-21apt-get20:10:020
641992020,0cyclictest7573-21apt-get23:02:003
641992020,0cyclictest0-21swapper/323:22:013
641992020,0cyclictest0-21swapper/323:15:013
641992020,0cyclictest0-21swapper/321:32:083
641992018,1cyclictest34-21ksoftirqd/321:10:003
641992018,1cyclictest26224-21perf22:25:003
641992017,2cyclictest5997-21cron00:15:003
64199200,20cyclictest0-21swapper/319:42:083
64199200,0cyclictest23657-21apt-get23:42:063
64199200,0cyclictest0-21swapper/319:32:053
637992020,0cyclictest27449-21apt-get21:10:022
637992020,0cyclictest1627-21apt-get00:07:072
637992020,0cyclictest0-21swapper/223:52:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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