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2023-01-28 - 18:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #2

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 Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of shadow in rack #9, slot #2
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 100 highest latencies:
System rack9slot2s (updated Thu Oct 29, 2020 00:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9170983730,365rtkit-daemon0-21swapper/219:07:452
143272167157,8sleep70-21swapper/719:08:167
118332950,0sleep656-21ksoftirqd/621:36:306
118332950,0sleep656-21ksoftirqd/621:36:306
14717997417,46cyclictest0-21swapper/000:10:260
1475299689,33cyclictest0-21swapper/722:00:167
1472399689,29cyclictest0-21swapper/121:20:171
1472399689,29cyclictest0-21swapper/121:20:171
88642560,1sleep442-21ksoftirqd/421:35:004
14733995615,25cyclictest0-21swapper/300:15:473
1475299556,11cyclictest22760-21gltestperf20:20:077
1472399556,23cyclictest15610-21gltestperf19:10:071
14723995251,1cyclictest6667-21needreboot19:50:141
1472399520,36cyclictest0-21swapper/121:12:141
14752995049,0cyclictest13092-21grep21:00:087
14723995048,1cyclictest14806-21gltestperf20:05:051
14723994826,11cyclictest0-21swapper/121:36:441
14723994826,11cyclictest0-21swapper/121:36:441
14717994745,1cyclictest31067-21grep21:55:140
14752994610,18cyclictest0-21swapper/721:41:157
14743994644,1cyclictest8630-21taskset23:10:135
14747994543,1cyclictest19017-21fschecks_time19:15:056
14728994511,20cyclictest0-21swapper/223:41:482
14717994545,0cyclictest32576-21grep00:09:590
14728994414,19cyclictest0-21swapper/219:40:402
14723994442,1cyclictest14981-21gltestperf22:45:061
14752994343,0cyclictest0-21swapper/721:24:357
14752994343,0cyclictest0-21swapper/721:24:357
14752994340,2cyclictest0-21swapper/721:50:447
14743994341,1cyclictest24378-21gltestperf21:50:055
14737994341,1cyclictest32640-21grep21:25:004
14737994341,1cyclictest32640-21grep21:25:004
14733994341,1cyclictest3032-21grep19:45:023
14733994340,2cyclictest1694-21pmcd22:33:143
1475299420,1cyclictest0-21swapper/720:03:347
14747994241,1cyclictest1115-21ksmtuned00:25:006
14743994239,3cyclictest5392-21needreboot21:30:085
14733994241,0cyclictest28357-21grep20:30:043
14733994240,1cyclictest25439-21grep20:25:053
14723994240,1cyclictest30394-21gltestperf23:00:061
14723994240,1cyclictest23404-21fschecks_time21:15:051
14717994240,1cyclictest5322-21grep21:30:080
14737994110,17cyclictest0-21swapper/420:40:484
14723994141,0cyclictest29394-21grep21:55:041
14723994139,1cyclictest0-21swapper/120:40:071
14717994139,1cyclictest22750-21gltestperf23:25:050
14743994032,7cyclictest13761-21cat21:40:005
14743994032,7cyclictest13761-21cat21:40:005
14717994038,1cyclictest13084-21fschecks_time23:50:050
14752993938,0cyclictest0-21swapper/720:28:357
14747993937,1cyclictest13674-21strings21:00:126
14743993937,1cyclictest0-21swapper/523:00:105
14743993931,8cyclictest23975-21hwlatdetect00:00:095
14728993937,1cyclictest20517-21cat20:15:092
14723993939,0cyclictest0-21swapper/123:17:041
14717993937,1cyclictest18758-21gltestperf23:55:060
14747993838,0cyclictest1115-21ksmtuned22:40:156
14747993837,0cyclictest0-21swapper/621:10:046
14743993838,0cyclictest0-21swapper/520:19:345
14743993836,1cyclictest32102-21ntpq20:35:155
14743993836,1cyclictest1956-21ls00:10:135
1474399380,37cyclictest0-21swapper/519:30:045
14733993838,0cyclictest0-21swapper/321:01:253
14733993837,1cyclictest11134-21cat20:00:003
14733993828,3cyclictest0-21swapper/323:10:443
14728993836,1cyclictest24153-21gltestperf00:25:062
14723993836,1cyclictest26934-21cpuspeed_turbos22:25:041
14723993836,1cyclictest25305-21find21:50:171
14717993836,1cyclictest10470-21unixbench_singl19:55:150
14747993735,1cyclictest7993-21wc19:55:006
14747993735,1cyclictest19523-21gltestperf21:45:066
14747993735,1cyclictest19523-21gltestperf21:45:066
14747993735,1cyclictest1872-21gltestperf00:35:066
14747993735,1cyclictest17878-21needreboot22:15:126
14743993737,0cyclictest0-21swapper/522:21:555
14743993736,0cyclictest0-21swapper/519:12:455
1474399370,0cyclictest0-21swapper/519:59:145
1473799379,12cyclictest0-21swapper/421:15:124
14737993737,0cyclictest1115-21ksmtuned21:00:124
14737993725,4cyclictest0-21swapper/423:55:144
1473799370,21cyclictest0-21swapper/421:41:074
14733993737,0cyclictest0-21swapper/323:09:543
14733993731,2cyclictest0-21swapper/322:43:443
14723993737,0cyclictest26984-21kworker/u16:023:30:001
14723993736,0cyclictest15311-21grep21:05:031
1438223724,8sleep60-21swapper/619:08:556
14752993634,1cyclictest30396-21grep21:55:097
1475299360,35cyclictest0-21swapper/719:35:547
14747993634,1cyclictest28112-21tr21:20:036
14747993634,1cyclictest28112-21tr21:20:036
14743993636,0cyclictest0-21swapper/523:52:155
14743993634,1cyclictest32552-21sh00:10:005
14743993632,3cyclictest9801-21cpuspeed_turbos20:55:075
1473799367,15cyclictest0-21swapper/400:11:474
14737993635,1cyclictest31073-21cpuspeed_turbos20:35:024
14737993635,0cyclictest24360-21cut21:50:054
14737993634,1cyclictest13550-21timerwakeupswit23:15:134
14737993610,17cyclictest0-21swapper/422:41:404
14733993634,1cyclictest7861-21cpuspeed_turbos23:45:033
14733993634,1cyclictest5645-21cpuspeed_turbos19:50:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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