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2022-12-04 - 23:40

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 Sun Dec 04, 2022 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1938621530,11sleep02133599cyclictest07:32:190
2411921060,12sleep02133599cyclictest09:57:240
210172980,5sleep121020-21sort07:37:121
210172980,5sleep121020-21sort07:37:121
241999730,9rtkit-daemon0-21swapper/309:37:232
21338997027,34cyclictest24052-21sendmail_mailqu09:57:223
21338996918,44cyclictest0-21swapper/308:01:573
76482670,4sleep37758-21grep09:22:303
241999670,7rtkit-daemon23683-21crond05:27:031
241999670,6rtkit-daemon0-21swapper/105:33:030
241999670,6rtkit-daemon0-21swapper/105:24:030
21338996725,36cyclictest26667-21df_abs05:32:183
21338996717,25cyclictest15084-21munin-run06:17:013
2133799673,8cyclictest16656-21nscd07:52:262
21338996618,30cyclictest9002-21awk08:17:323
21338996618,30cyclictest9002-21awk08:17:323
21338996615,44cyclictest0-21swapper/308:36:233
267862653,54sleep226905-21sed08:57:092
267862653,54sleep226905-21sed08:57:092
21338996516,41cyclictest21554-21latency_hist08:46:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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