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2023-10-01 - 21:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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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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 20 highest latencies:
System rack9slot4s.osadl.org (updated Sun Oct 01, 2023 12:59:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81339911131090,19cyclictest2397-21lldpd08:20:281
79682447404,29sleep00-21swapper/007:23:520
80122354310,29sleep10-21swapper/107:24:181
813299115106,5cyclictest23201-21ntp_states08:20:280
996121110,5sleep02779-21snmpd07:30:190
1646221020,5sleep12397-21lldpd09:35:321
138532790,4sleep1813399cyclictest12:20:301
138532790,4sleep1813399cyclictest12:20:291
205662770,4sleep1211ktimersoftd/109:45:351
311922620,4sleep017537-21kworker/0:311:40:310
226412480,6sleep02397-21lldpd12:45:170
813299458,11cyclictest2397-21lldpd09:56:030
813399446,16cyclictest0-21swapper/111:15:251
813299448,16cyclictest2397-21lldpd10:18:160
813299446,8cyclictest2779-21snmpd10:59:080
8132994410,15cyclictest2779-21snmpd10:14:090
8133994326,5cyclictest22-21ksoftirqd/111:57:011
8133994325,5cyclictest22-21ksoftirqd/107:41:331
8133994216,15cyclictest22-21ksoftirqd/109:12:171
8133994125,5cyclictest22-21ksoftirqd/107:54:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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