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2023-03-22 - 04:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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

x86 Intel Atom D510 @1667 MHz, Linux 3.12.61-rt81 (Profile)

Latency plot of shadow in rack #1, 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 20 highest latencies:
System rack1slot6s.osadl.org (updated Wed Mar 22, 2023 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25537999639,50cyclictest1199-21runrttasks19:00:022
2553799954,26cyclictest0-21swapper/220:25:442
2553799954,26cyclictest0-21swapper/220:25:442
2553299954,14cyclictest0-21swapper/021:03:260
234599950,7rtkit-daemon0-21swapper/118:18:391
2553799944,25cyclictest0-21swapper/221:28:592
25532999433,10cyclictest28332-21grep18:23:480
25532999433,10cyclictest28332-21grep18:23:480
2553799934,28cyclictest0-21swapper/219:08:402
25532999334,9cyclictest26626-21tune2fs21:43:410
25532999217,10cyclictest0-21swapper/020:33:470
2553299914,29cyclictest0-21swapper/023:13:380
2553299914,29cyclictest0-21swapper/023:13:380
234599910,6rtkit-daemon0-21swapper/118:30:091
2553799884,76cyclictest0-21swapper/220:18:422
2553799884,26cyclictest0-21swapper/223:01:112
25537998827,53cyclictest10230-21gltestperf21:08:492
25537998827,53cyclictest10230-21gltestperf21:08:492
2553799875,73cyclictest0-21swapper/223:23:552
25537998737,42cyclictest28310-21grep19:29:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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