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2025-01-22 - 00:23

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 50 highest latencies:
System rackeslot5s.osadl.org (updated Tue Jan 21, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22248993433,1cyclictest1994-21lspci11:12:431
22253993128,3cyclictest0-21swapper/311:12:433
2225399270,26cyclictest20281-21apt10:40:003
22253992420,3cyclictest18755-21apt-get09:15:583
2225199240,1cyclictest23568-21apt-get09:25:522
22253992321,1cyclictest593-21dbus-daemon10:14:593
2225399230,22cyclictest4168-21cron10:00:013
2225399230,22cyclictest29850-21cron07:25:003
2225399230,22cyclictest1132-21dump-pmu-power09:50:003
2225399230,19cyclictest19186-21perf08:10:003
2225199230,0cyclictest0-21swapper/208:15:552
22248992321,1cyclictest22705-21munin-plugin-st10:45:001
22246992321,1cyclictest25284-21apt-get07:15:020
2224699230,22cyclictest28844-21munin-run08:29:590
22253992222,0cyclictest0-21swapper/310:55:513
22253992221,1cyclictest982-21grep11:09:593
2225399220,21cyclictest26337-21apt09:35:003
2225399220,21cyclictest15656-21dump-pmu-power11:45:003
2225399220,1cyclictest4952-21awk12:40:003
2225399220,1cyclictest27480-21perf07:20:003
22251992221,1cyclictest1214-21apt-get08:40:022
22251992220,1cyclictest12769-21apt-get10:20:542
2225199220,21cyclictest8970-21apt-get10:10:012
2225199220,21cyclictest27486-21sendmail-msp07:20:002
2225199220,21cyclictest0-21swapper/210:15:502
2225199220,21cyclictest0-21swapper/208:55:572
2224899220,21cyclictest0-21swapper/112:25:551
2224899220,21cyclictest0-21swapper/111:15:511
2224899220,21cyclictest0-21swapper/110:00:551
2224899220,0cyclictest0-21swapper/111:25:551
2224899220,0cyclictest0-21swapper/111:25:551
2224699220,21cyclictest8983-21sh10:09:590
2224699220,21cyclictest31483-21apt-get12:25:000
2224699220,21cyclictest29082-21apt-get09:40:540
2224699220,21cyclictest26684-21wc12:15:000
2224699220,21cyclictest23259-21munin-plugin-st09:25:000
2224699220,21cyclictest13959-21apt-get09:05:550
2224699220,21cyclictest0-21swapper/011:35:490
2224699220,1cyclictest32594-21apt-get07:30:520
2224699220,1cyclictest29086-21sendmail-msp12:20:000
22253992121,0cyclictest0-21swapper/307:50:533
22253992121,0cyclictest0-21swapper/307:45:533
22253992119,1cyclictest29096-21latency_hist12:20:003
22253992119,1cyclictest0-21swapper/309:24:593
22253992118,2cyclictest593-21dbus-daemon09:00:013
2225399210,20cyclictest10345-21apt-get10:15:503
2225399210,20cyclictest0-21swapper/308:30:533
22251992120,1cyclictest26501-21apt-get10:55:502
22251992119,1cyclictest1791-21idleruntime-cro09:55:012
2225199210,20cyclictest11562-21apt-get09:00:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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