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2022-10-03 - 03:14

x86 Intel Core i7-3770K @3500 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, slot #2
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 -n -a4-7 -p99 -i200 -h400 -t4 -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 rack0slot2.osadl.org (updated Mon Oct 03, 2022 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
118726526353,6sleep50-21swapper/519:02:245
118724725647,6sleep60-21swapper/619:02:096
118723424637,6sleep40-21swapper/419:01:594
11874612383,28sleep70-21swapper/719:05:077
1187842991915,3cyclictest1696195-21snmpd23:42:317
1187842991815,2cyclictest1788917-21cat00:01:407
118784299170,16cyclictest1696195-21snmpd20:53:497
1187842991511,3cyclictest1251744-21ntp_states19:36:517
118783799150,15cyclictest0-21swapper/419:41:364
118783799150,15cyclictest0-21swapper/419:41:364
118784299149,4cyclictest1696195-21snmpd20:23:037
1187842991411,2cyclictest1696195-21snmpd19:16:467
118783899140,14cyclictest0-21swapper/523:17:005
118783799140,14cyclictest0-21swapper/422:25:534
118783799140,13cyclictest0-21swapper/422:59:564
118784299139,3cyclictest1696195-21snmpd21:37:027
118784299139,3cyclictest1613030-21cat22:41:407
118784299139,3cyclictest1613030-21cat22:41:407
118784299133,3cyclictest918-21lldpd00:11:597
1187839991313,0cyclictest0-21swapper/600:34:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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