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2023-01-31 - 05:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #4

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 Pentium N4200 @1100 MHz, Linux 5.9.1-rt18 (Profile)

Latency plot of shadow in rack #c, slot #4
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 20 highest latencies:
System rackcslot4s.osadl.org (updated Tue Jan 31, 2023 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
627299441,25cyclictest3858-21awk23:50:002
627299441,25cyclictest3858-21awk23:50:002
627299432,24cyclictest11693-21lsb_release21:00:012
627299431,29cyclictest19438-21lsb_release00:34:592
6272994310,19cyclictest3098-21cron20:35:002
627299381,21cyclictest14861-21timerandwakeup19:30:292
627299360,19cyclictest29326-21ntp_states21:50:222
627299360,19cyclictest20114-21cat00:35:232
627299350,24cyclictest22392-21ntp_states21:30:242
627299350,24cyclictest17997-21snmp_o5powerctl19:40:292
627299350,18cyclictest8331-21cut22:25:002
627299341,19cyclictest5868-21sed22:15:352
627299341,19cyclictest4485-21sshd22:13:282
627299341,16cyclictest0-21swapper/222:45:242
627299340,23cyclictest8032-21mailstats20:45:272
627299340,23cyclictest0-21swapper/200:15:282
627299340,20cyclictest548-21munin-run23:40:002
627299340,19cyclictest26694-21sshd21:42:442
627299340,18cyclictest23025-21cat23:05:332
627299340,17cyclictest3339-21apt-get20:35:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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