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2022-05-25 - 19:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 
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x86 AMD Ryzen XXXX @3300 MHz, Linux 4.18.7-rt5 (Profile)

Latency plot of shadow in rack #c, slot #3
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 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rackcslot3s (updated Fri May 20, 2022 00:50:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
283202700684,11sleep20-21swapper/219:07:292
284222585568,11sleep30-21swapper/319:08:583
284522540522,12sleep40-21swapper/419:09:234
283332535517,13sleep60-21swapper/619:07:416
264942534513,14sleep00-21swapper/019:05:100
284152522502,14sleep50-21swapper/519:08:525
283072491474,12sleep70-21swapper/719:07:187
282052491470,15sleep10-21swapper/119:05:511
28934996447,1cyclictest18522-21cat19:55:013
28937995755,1cyclictest17163-21grep00:20:136
28937995451,2cyclictest2729-21grep19:20:236
28936995452,1cyclictest16567-21latency_hist00:20:005
28936995452,1cyclictest16567-21latency_hist00:20:005
28938995350,2cyclictest2730-21latency19:20:237
28936995250,1cyclictest2920-21sh20:30:015
28936995250,1cyclictest17937-21grep00:20:235
28933995228,23cyclictest24600-21grep22:20:222
28935995150,0cyclictest2515-21tail20:25:344
28933995048,1cyclictest9013-21sh00:05:002
28933994745,1cyclictest13217-21cpuspeed_turbos23:05:122
28936994644,1cyclictest13126-21cpuspeed_turbos20:50:145
28934994644,1cyclictest32407-21tail22:35:313
2893299466,31cyclictest0-21swapper/119:30:221
28938994543,1cyclictest19148-21tr22:10:137
28936994544,0cyclictest26038-21grep23:30:215
28936994442,1cyclictest24032-21grep21:10:325
28935994442,1cyclictest19648-21cpuspeed_turbos00:25:204
28935994442,1cyclictest19648-21cpuspeed_turbos00:25:204
28934994442,1cyclictest13795-21unixbench_singl00:10:313
28932994443,0cyclictest10097-21cron20:45:001
28931994442,1cyclictest27084-21sh23:34:590
28936994340,1cyclictest32146-21tr21:30:145
28934994341,1cyclictest27470-21cpuspeed_turbos21:20:123
28933994341,1cyclictest5944-21tr20:35:132
2893299425,27cyclictest0-21swapper/121:22:081
28936994139,1cyclictest4618-21grep19:25:125
28933994139,1cyclictest31881-21sh23:45:002
28932994140,0cyclictest7201-21tr21:45:131
28932994139,1cyclictest17139-21grep00:20:131
28937994020,19cyclictest21448-21grep22:15:136
28933994037,1cyclictest7040-21tr19:30:132
28932994019,20cyclictest982-21timerwakeupswit21:30:321
28938993935,2cyclictest1604-21sh19:20:017
2893699394,19cyclictest0-21swapper/521:05:345
28936993937,1cyclictest2421-21grep23:50:135
28935993936,1cyclictest13699-21apt22:00:004
28933993937,1cyclictest5397-21wc20:35:012
28933993933,5cyclictest0-21swapper/200:40:012
28932993938,0cyclictest2245-21grep19:20:141
28937993836,1cyclictest7203-21wc20:35:366
28936993836,1cyclictest2249-21cut19:20:145
2893699383,19cyclictest0-21swapper/519:15:025
28936993812,13cyclictest26624-21kworker/5:020:02:135
28935993836,1cyclictest28598-21grep22:30:124
28935993836,1cyclictest14451-21unixbench_multi20:50:404
2893499389,12cyclictest0-21swapper/321:27:423
28934993836,1cyclictest15732-21tr23:10:103
28934993836,1cyclictest1114-21timerwakeupswit19:15:383
28933993836,1cyclictest7193-21grep21:45:132
28933993823,14cyclictest8465-21cpuspeed_turbos22:55:122
28931993836,1cyclictest8423-21tr22:55:120
28931993835,2cyclictest777-21needreboot23:45:230
2893199383,18cyclictest0-21swapper/000:30:300
28936993714,1cyclictest24324-21grep00:35:135
28935993736,0cyclictest30102-21tr23:40:124
28935993736,0cyclictest11438-21grep20:45:264
28935993735,1cyclictest4661-21grep20:30:354
28934993735,1cyclictest0-21swapper/300:15:343
28934993735,1cyclictest0-21swapper/300:15:343
28933993735,1cyclictest0-21swapper/223:15:122
28932993711,12cyclictest0-21swapper/122:44:451
28931993735,1cyclictest19660-21tr00:25:200
28931993735,1cyclictest19660-21tr00:25:200
28931993735,1cyclictest0-21swapper/019:20:140
28938993634,1cyclictest12412-21latency21:55:197
28938993634,1cyclictest10825-21grep23:00:147
28937993634,1cyclictest2409-21grep23:50:136
28937993634,1cyclictest16256-21cat23:10:186
28936993634,1cyclictest29887-21grep22:30:315
28936993634,1cyclictest25681-21wc22:25:005
28936993634,1cyclictest20581-21tr23:20:135
28936993611,24cyclictest5890-21tr20:35:135
28935993636,0cyclictest0-21swapper/419:50:344
28935993635,0cyclictest29869-21timerwakeupswit20:15:324
28935993634,1cyclictest9023-21latency_hist21:50:004
28935993634,1cyclictest18179-21grep23:15:124
2893499365,12cyclictest0-21swapper/300:27:273
2893499365,12cyclictest0-21swapper/300:27:273
28934993612,12cyclictest0-21swapper/322:16:353
2893499360,0cyclictest0-21swapper/320:00:353
28933993634,1cyclictest9693-21chrt20:40:352
28933993634,1cyclictest0-21swapper/200:25:372
28933993634,1cyclictest0-21swapper/200:25:372
28933993633,1cyclictest24960-21grep21:15:132
28933993630,5cyclictest24110-21grep23:25:322
2893399360,0cyclictest0-21swapper/219:45:132
2893299360,35cyclictest0-21swapper/100:10:301
28938993534,0cyclictest2119-21latency_hist23:50:017
28938993533,1cyclictest9472-21cut19:35:137
28938993533,1cyclictest24336-21grep00:35:137
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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