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2022-07-06 - 18:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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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x86 Intel Core i7-4960X @3600 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of shadow in rack #0, slot #4
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack0slot4s.osadl.org (updated Wed Jul 06, 2022 00:45:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1634332414392,14sleep140-21swapper/1419:08:016
1635092401394,4sleep100-21swapper/1019:09:022
1632342401394,4sleep70-21swapper/719:05:2913
1633512359317,14sleep120-21swapper/1219:06:554
1635172347309,13sleep00-21swapper/019:09:080
1635182342330,7sleep10-21swapper/119:09:091
1634482342321,13sleep110-21swapper/1119:08:153
1635742341318,14sleep130-21swapper/1319:09:535
1635202341321,12sleep30-21swapper/319:09:119
1633442341320,13sleep50-21swapper/519:06:4911
1633002339317,13sleep60-21swapper/619:06:1812
1632482339315,14sleep150-21swapper/1519:05:377
1635692337316,13sleep90-21swapper/919:09:4915
1635072337314,14sleep80-21swapper/819:08:5914
1635832336315,13sleep20-21swapper/219:09:588
1632562335314,13sleep40-21swapper/419:05:4310
164023994419,14cyclictest74-21ksoftirqd/823:16:3114
164023993914,0cyclictest0-21swapper/822:32:3514
164023993814,11cyclictest74-21ksoftirqd/820:31:4614
164023993713,11cyclictest74-21ksoftirqd/821:04:4314
16402399370,12cyclictest0-21swapper/819:47:5014
164043993231,1cyclictest0-21swapper/1422:00:446
16402399327,0cyclictest0-21swapper/821:48:3814
16402399317,11cyclictest74-21ksoftirqd/819:36:5214
3242912300,0sleep874-21ksoftirqd/821:55:1714
16402399270,14cyclictest0-21swapper/823:49:2814
16402399262,0cyclictest0-21swapper/822:21:3514
16402399261,14cyclictest74-21ksoftirqd/800:33:2414
164023992515,10cyclictest731rcuc/823:05:3214
164023992515,10cyclictest731rcuc/823:05:3214
164023992413,11cyclictest74-21ksoftirqd/819:58:5014
164023992411,0cyclictest0-21swapper/820:53:4314
16402399240,13cyclictest0-21swapper/822:10:3614
16402399240,13cyclictest0-21swapper/820:20:4714
16402399240,13cyclictest0-21swapper/820:09:4914
16402399240,13cyclictest0-21swapper/800:00:2714
16402399240,11cyclictest74-21ksoftirqd/821:15:4114
16402399230,20cyclictest0-21swapper/821:50:1514
16402399230,12cyclictest0-21swapper/820:42:4414
164048992120,1cyclictest392708-21nodedev-init22:50:177
164029992119,2cyclictest1393-21snmpd23:06:082
164029992119,2cyclictest1393-21snmpd23:06:082
16402399218,13cyclictest0-21swapper/800:22:2514
16404899200,17cyclictest0-21swapper/1521:02:587
16404899200,17cyclictest0-21swapper/1500:22:037
164043992019,1cyclictest1393-21snmpd20:02:106
164043992019,1cyclictest1393-21snmpd19:16:366
16404399200,1cyclictest0-21swapper/1422:54:466
16404399200,17cyclictest0-21swapper/1423:04:166
16404399200,17cyclictest0-21swapper/1423:04:166
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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