starting the annual discussion regarding top(1)'s CPU usage statistics

From: Alexander Best <arundel_at_freebsd.org>
Date: Sun, 25 Dec 2011 21:40:33 +0000
ok...so we all know that top(1) cannot compute the exact CPU usage for all
processes, since some processes get spawned and exit so fast that they don't
fall into the calculation range. i think nobody is getting angry when top(1)
is off by a few percent.

however please take a look at the following top(1) output. this is just
ridiculous! out of 800% of CPU power, almost 600% mysteriously vanished. is
there really nothing to improve top(1)'s behaviour when the CPU is dealing with
a lot of short processes (time wise) with a hugh CPU burst?

this output was gathered on HEAD (r227491) running on i386.

cheers.
alex

ps: no, switching between raw and weighted CPU stats did *not* make a
    difference. ;)

Received on Sun Dec 25 2011 - 20:40:33 UTC

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