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2022-05-23 - 03:41

x86 Intel Core i7-3770K @3500 MHz, Linux 5.15.32-rt39 (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 May 23, 2022 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22637827565,6sleep40-21swapper/419:07:364
22619726051,6sleep60-21swapper/619:05:056
22625823930,6sleep50-21swapper/519:05:525
22641123021,6sleep70-21swapper/719:08:037
22674699160,15cyclictest289598-21diskmemload21:46:587
226746991513,1cyclictest1016-21snmpd23:55:287
226746991413,1cyclictest454074-21diskmemload00:06:497
226746991412,1cyclictest1016-21snmpd00:35:537
22674699140,1cyclictest306610-21rm21:25:327
22674699140,14cyclictest332757-21ntpq21:53:457
22674699140,14cyclictest1748769-21containerd23:32:177
22674599145,9cyclictest357122-21kworker/u16:022:30:146
22674599140,14cyclictest0-21swapper/621:50:476
226746991310,2cyclictest348157-21ssh22:10:567
226746991310,2cyclictest348157-21ssh22:10:567
22674699130,13cyclictest0-21swapper/719:28:427
22674699130,13cyclictest0-21swapper/700:21:107
22674699130,0cyclictest471419-21ssh00:24:387
22674699130,0cyclictest0-21swapper/720:32:347
22674599130,13cyclictest0-21swapper/623:00:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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