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2025-05-02 - 12:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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 - 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 rack3slot3s.osadl.org (updated Fri May 02, 2025 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4146843211557,52sleep30-21swapper/319:05:263
414726228466,12sleep10-21swapper/119:09:291
414725128062,13sleep00-21swapper/019:09:200
414700227862,10sleep20-21swapper/219:06:092
4147457993833,2cyclictest0-21swapper/323:00:003
4147455993732,3cyclictest87618-21pmu-power22:35:202
4147455993026,2cyclictest4152461-21cut19:20:142
4147457992924,2cyclictest0-21swapper/323:45:263
4147455992924,3cyclictest4188253-21cpuspeed_turbos20:50:152
4147455992924,3cyclictest195356-21cpuspeed_turbos00:25:132
4147455992924,3cyclictest1-21systemd00:03:472
4147455992817,8cyclictest7357-21cut21:15:142
4147455992813,12cyclictest1809-21diskmemload00:06:122
4147455992724,2cyclictest4147447-21cyclictest20:40:012
4147455992723,3cyclictest4190249-21cpuspeed_turbos20:55:172
4147455992722,3cyclictest96716-21cpuspeed_turbos22:45:122
4147455992722,3cyclictest706-21gpm23:46:542
4147455992718,6cyclictest57761-21cut22:05:232
4147455992621,3cyclictest4172287-21fschecks_count20:10:172
4147455992621,3cyclictest0-21swapper/200:15:002
4147455992616,6cyclictest92364-21netstat22:40:172
4147455992615,8cyclictest944-21snmpd22:15:082
4147457992522,1cyclictest0-21swapper/323:01:483
4147455992520,3cyclictest51473-21munin-run22:00:012
4147455992513,8cyclictest2766-21sed21:10:182
4147455992511,12cyclictest0-21swapper/222:20:182
4147455992420,2cyclictest0-21swapper/223:40:222
4147455992419,3cyclictest83112-21unixbench_singl22:30:262
4147455992419,3cyclictest147106-21head23:35:172
4147455992419,2cyclictest0-21swapper/219:10:142
4147455992411,9cyclictest41220-21sshd21:49:322
4147457992320,1cyclictest0-21swapper/321:41:483
4147457992320,1cyclictest0-21swapper/300:31:483
4147457992319,2cyclictest0-21swapper/323:10:243
4147457992318,2cyclictest0-21swapper/322:50:233
414745599231,8cyclictest34363-21sh21:41:432
4147455992318,3cyclictest27782-21ntp_kernel_err21:35:212
4147455992318,3cyclictest186704-21fschecks_time00:15:142
414745599231,7cyclictest4181563-21runrttasks20:33:332
414745599231,7cyclictest4181563-21runrttasks20:33:322
414745599231,19cyclictest64458-21kworker/u16:1+rpciod23:24:582
414745599231,18cyclictest45661-21sh21:53:452
414745599230,20cyclictest52269-21runrttasks22:00:142
1143982230,2sleep00-21swapper/023:02:120
4147457992219,1cyclictest0-21swapper/322:49:473
4147457992219,1cyclictest0-21swapper/322:05:273
4147457992219,1cyclictest0-21swapper/321:37:483
4147457992219,1cyclictest0-21swapper/321:33:483
4147455992218,2cyclictest4162658-21ntp_kernel_pll_19:45:222
4147455992218,2cyclictest0-21swapper/222:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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