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2021-08-05 - 07:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 
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Intel(R) Core(TM) i7 CPU M 620 @ 2.67GHz, Linux 4.19.106-rt45+ (Profile)

Latency plot of shadow in rack #3, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack3slot6s.osadl.org (updated Thu Aug 05, 2021 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28641211893,20sleep00-21swapper/019:09:440
285352111100,6sleep30-21swapper/319:08:233
28400210887,15sleep20-21swapper/219:06:372
28597210081,6sleep10-21swapper/119:09:091
298542750,1sleep30-21swapper/323:34:593
220342670,1sleep00-21swapper/021:45:200
28692993619,16cyclictest0-21swapper/223:30:122
2869299320,2cyclictest0-21swapper/219:15:132
28693992421,2cyclictest14786-21kworker/u8:223:23:043
28693992421,2cyclictest14786-21kworker/u8:222:58:043
28693992320,2cyclictest20252-21kworker/u8:000:09:043
28693992320,2cyclictest14786-21kworker/u8:223:03:043
28693992320,2cyclictest14722-21kworker/u8:020:16:043
2869299230,22cyclictest0-21swapper/223:12:442
28693992219,2cyclictest4514-21kworker/u8:020:57:033
28693992219,2cyclictest3662-21kworker/u8:119:58:043
28693992219,2cyclictest29492-21kworker/u8:223:35:043
28693992219,2cyclictest27502-21kworker/u8:222:39:043
28693992219,2cyclictest27502-21kworker/u8:219:47:043
28693992219,2cyclictest27177-21kworker/u8:022:00:043
28693992219,2cyclictest21065-21kworker/u8:121:41:043
28693992219,2cyclictest20252-21kworker/u8:023:50:043
28693992219,2cyclictest20252-21kworker/u8:000:12:043
28693992219,2cyclictest1474-21kworker/u8:019:11:033
28692992219,2cyclictest3662-21kworker/u8:119:41:042
28692992219,2cyclictest14786-21kworker/u8:223:04:042
2869099220,20cyclictest0-21swapper/020:50:490
28693992118,2cyclictest4514-21kworker/u8:021:31:043
28693992118,2cyclictest4514-21kworker/u8:021:08:043
28693992118,2cyclictest4514-21kworker/u8:021:08:043
28693992118,2cyclictest4514-21kworker/u8:021:00:043
28693992118,2cyclictest27502-21kworker/u8:222:27:043
28693992118,2cyclictest27177-21kworker/u8:022:10:043
28693992118,2cyclictest21065-21kworker/u8:121:52:043
28693992118,2cyclictest14786-21kworker/u8:223:14:043
28693992118,2cyclictest14786-21kworker/u8:223:05:033
28693992118,2cyclictest1474-21kworker/u8:019:18:043
28693992118,2cyclictest14722-21kworker/u8:020:29:023
28693992118,2cyclictest14722-21kworker/u8:020:02:043
28693992118,2cyclictest11086-21kworker/u8:122:42:043
28693992117,3cyclictest29492-21kworker/u8:200:22:033
28692992118,2cyclictest29492-21kworker/u8:223:41:042
28692992118,2cyclictest27177-21kworker/u8:022:16:032
28693992017,2cyclictest4514-21kworker/u8:021:22:043
28693992017,2cyclictest4514-21kworker/u8:021:18:043
28693992017,2cyclictest4514-21kworker/u8:021:13:043
28693992017,2cyclictest29492-21kworker/u8:200:28:043
28693992017,2cyclictest27502-21kworker/u8:220:12:043
28693992017,2cyclictest14722-21kworker/u8:020:24:043
28693992017,2cyclictest11086-21kworker/u8:122:52:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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