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2024-04-20 - 00:45

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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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 Fri Apr 19, 2024 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
320999260,26cyclictest0-21swapper/009:13:010
320999260,25cyclictest29399-21diskmemload09:59:000
3216992523,1cyclictest0-21swapper/310:32:013
321399250,24cyclictest28555-21apt-get10:47:002
3210992523,1cyclictest8214-21turbostat.cron10:25:001
3210992523,1cyclictest0-21swapper/109:15:141
321099250,24cyclictest30556-21ssh09:11:231
321099250,24cyclictest0-21swapper/109:55:521
3209992523,1cyclictest0-21swapper/009:18:420
320999250,24cyclictest29399-21diskmemload12:23:560
320999250,24cyclictest29399-21diskmemload10:59:570
320999250,24cyclictest29399-21diskmemload09:46:220
320999250,20cyclictest27014-21cron09:05:000
320999250,1cyclictest29399-21diskmemload11:27:070
3216992423,1cyclictest29399-21diskmemload09:40:063
3216992423,1cyclictest19733-21ls10:37:073
3216992423,1cyclictest0-21swapper/309:22:013
321699241,0cyclictest19993-1kworker/u9:111:23:433
321699240,23cyclictest597-21dbus-daemon08:45:013
321699240,23cyclictest4855-21apt-get10:21:593
321699240,23cyclictest26462-21ssh11:53:513
321699240,23cyclictest22250-21sh12:24:103
321699240,23cyclictest0-21swapper/311:33:253
321699240,1cyclictest1006-21ssh09:13:103
3213992423,0cyclictest0-21swapper/209:35:312
321399240,23cyclictest0-21swapper/210:07:002
3210992421,2cyclictest24132-21ls11:52:001
321099240,23cyclictest5728-21ssh09:48:571
321099240,23cyclictest29399-21diskmemload10:16:441
321099240,23cyclictest0-21swapper/109:22:471
321099240,22cyclictest18640-21systemd-journal07:35:001
321099240,1cyclictest7139-21ssh09:50:101
321099240,1cyclictest29399-21diskmemload11:47:411
321099240,0cyclictest0-21swapper/111:35:331
321099240,0cyclictest0-21swapper/111:12:031
321099240,0cyclictest0-21swapper/111:12:031
3209992421,3cyclictest29399-21diskmemload12:07:000
3209992421,2cyclictest12794-21awk11:40:000
320999240,23cyclictest29399-21diskmemload10:29:570
320999240,1cyclictest29399-21diskmemload11:48:250
320999240,1cyclictest29399-21diskmemload11:44:170
320999240,1cyclictest0-21swapper/009:25:220
320999240,0cyclictest0-21swapper/010:40:310
3216992323,0cyclictest29399-21diskmemload10:53:233
3216992323,0cyclictest0-21swapper/312:27:343
3216992323,0cyclictest0-21swapper/312:09:343
3216992323,0cyclictest0-21swapper/311:03:163
3216992323,0cyclictest0-21swapper/310:49:393
3216992321,1cyclictest0-21swapper/312:00:193
3216992321,1cyclictest0-21swapper/311:47:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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