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List: netbsd-users
Subject: Re: top(1) behavior
From: RVP <rvp () SDF ! ORG>
Date: 2023-08-13 7:14:14
Message-ID: bbe056e8-a9aa-a588-c235-69c5a5c98398 () SDF ! ORG
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On Sat, 12 Aug 2023, Kevin Bowling wrote:
> Here's a sample, this one is a bit better since the cc1plus processes
> stick around for a bit longer but it still shows the WCPU% not adding
> up near the global CPU stats. I can annotate it as an image if it is
> still not clear.
>
> load averages: 6.15, 3.21, 1.67; up 0+04:56:56
> 12:37:26
> 142 threads: 2 runnable, 123 sleeping, 10 zombie, 7 on CPU
> CPU0 states: 92.6% user, 0.0% nice, 7.4% system, 0.0% interrupt, 0.0% idle
> CPU1 states: 91.6% user, 0.0% nice, 8.2% system, 0.0% interrupt, 0.2% idle
> CPU2 states: 91.6% user, 0.0% nice, 8.4% system, 0.0% interrupt, 0.0% idle
> CPU3 states: 89.4% user, 0.0% nice, 10.0% system, 0.0% interrupt, 0.6% idle
> CPU4 states: 57.9% user, 0.0% nice, 10.2% system, 0.0% interrupt, 31.9% idle
> CPU5 states: 99.8% user, 0.0% nice, 0.2% system, 0.0% interrupt, 0.0% idle
> CPU6 states: 96.2% user, 0.0% nice, 3.4% system, 0.0% interrupt, 0.4% idle
> CPU7 states: 97.0% user, 0.0% nice, 3.0% system, 0.0% interrupt, 0.0% idle
> Memory: 7213M Act, 5392K Inact, 110M Wired, 105M Exec, 5933M File, 7165M Free
> Swap: 16G Total, 16G Free / Pools: 1017M Used
>
> PID LID USERNAME PRI STATE TIME WCPU CPU NAME COMMAND
> 1598 1598 kev009 25 CPU/5 0:26 98.03% 72.66% - cc1plus
> 6906 6906 kev009 25 CPU/7 0:26 96.51% 71.53% - cc1plus
> 29633 29633 kev009 25 CPU/2 0:01 64.58% 6.15% - cc1plus
> 6016 6016 kev009 25 CPU/6 0:01 75.00% 3.66% - cc1plus
> 5636 5636 kev009 25 CPU/1 0:01 50.00% 2.44% - cc1plus
>
You'll see the same behaviour even on FreeBSD if the CPU-intensive commands
finish quickly. The CPU-states display is a like a running-average, the
process-display is more like a snapshot. Try reducing the sleep time to, say,
.1s or run a few `openssl speed' tests to see this.
-RVP
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