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2022-01-23 - 10:03

Intel(R) Celeron(R) CPU N3350 @ 1.10GHz, Linux 5.13.0-27-generic (Profile)

Latency plot of system in rack #c, slot #4
Note that this system runs a non-RT kernel.
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 10 highest latencies:
System rackcslot4.osadl.org (updated Tue Jan 18, 2022 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
705399312,18cyclictest7555-21lsb_release10:50:001
7052993115,10cyclictest14863-21apt-get11:15:160
705399290,19cyclictest13336-21cat11:10:011
705399280,18cyclictest16219-21wc11:20:011
7053992718,5cyclictest24728-21apt-get08:05:201
705399271,2cyclictest111rcu_preempt12:35:071
705399271,22cyclictest26962-21apt-get11:55:251
705399262,17cyclictest0-21swapper/109:59:591
7053992514,7cyclictest15328-21apt-get09:25:181
7053992513,7cyclictest28545-21apt-get10:10:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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