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2024-12-11 - 08:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Wed Dec 11, 2024 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
74092240162,25sleep00-21swapper/019:07:040
75132205167,25sleep10-21swapper/119:08:251
76192204165,26sleep20-21swapper/219:09:472
56822203166,24sleep30-21swapper/319:05:123
1782621840,4sleep3774199cyclictest23:10:173
7737991080,106cyclictest0-21swapper/223:44:052
7737999995,3cyclictest0-21swapper/200:36:412
238202520,2sleep10-21swapper/120:55:271
126092480,2sleep30-21swapper/323:00:013
772599357,13cyclictest20009-21idleruntime-cro20:50:010
772599356,13cyclictest17803-21munin-run20:45:020
7725993511,11cyclictest13102-21idleruntime-cro00:15:010
773299311,24cyclictest0-21swapper/100:22:311
774199303,15cyclictest23667-21/usr/sbin/munin23:25:213
772599305,12cyclictest9621-21munin-run21:40:020
774199291,13cyclictest0-21swapper/300:34:023
7737992912,10cyclictest0-21swapper/222:57:222
773299293,20cyclictest0-21swapper/121:52:301
773299290,22cyclictest0-21swapper/123:17:431
773299290,22cyclictest0-21swapper/123:17:421
774199288,7cyclictest0-21swapper/323:55:173
774199285,3cyclictest0-21swapper/321:30:083
774199285,15cyclictest780-21rngd20:55:363
774199284,21cyclictest16201-21strings19:25:203
774199284,11cyclictest27833-21sh23:35:013
773299283,11cyclictest8686-21munin-run00:05:011
773299281,18cyclictest24734-21ntp_states23:25:181
772599289,16cyclictest32247-21awk23:45:010
774199275,10cyclictest10030-21munin-node21:20:283
774199274,14cyclictest13922-21mailstats23:00:243
774199274,11cyclictest780-21rngd19:54:263
7741992718,5cyclictest8656-40dnf20:20:433
774199271,13cyclictest0-21swapper/323:48:323
774199271,10cyclictest0-21swapper/320:49:043
773299272,21cyclictest5845-21munin-run22:45:001
773299272,11cyclictest32573-21munin-run20:05:011
7732992713,3cyclictest0-21swapper/123:30:111
773299270,20cyclictest0-21swapper/123:56:421
773299270,16cyclictest0-21swapper/123:00:201
772599271,13cyclictest17489-21munin-run00:25:010
774199266,5cyclictest12050irq/123-ahci[0022:10:013
774199265,9cyclictest780-21rngd19:40:243
774199265,17cyclictest12427-21head20:30:213
774199264,13cyclictest25013-21latency_hist22:15:013
774199264,13cyclictest25013-21latency_hist22:15:013
774199264,12cyclictest32758-21cat22:30:163
7737992612,4cyclictest5130-21ls20:15:132
773299262,20cyclictest32242-21munin-run23:45:011
773299261,17cyclictest0-21swapper/123:13:211
773299261,16cyclictest0-21swapper/123:21:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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