strange pids under heavy load (5.2-RC)
Doug White
dwhite at gumbysoft.com
Mon Dec 8 12:51:10 PST 2003
On Mon, 8 Dec 2003, Gordon Bergling wrote:
> Hi,
>
> I run 'make -j 32 buildkernel' to stressing my fresh 5.2-RC installation a
> little bit and saw some strange pids in a 'ps ax'. (The output of 'ps
> ax' is stripped down.)
>
> -----------------------------------------------------------------------
> 24111 p2 S+ 0:00.81 make -j 32 buildkernel KERNCONF=NEMESIS-UP
>
> 0 p2 ZW+ 0:00.00 (sh)
These are normal. make just hasn't gotten around to clearing these yet.
make spawns and reaps processes in groups rather than keeping the -j
number busy at all times.
Note that -j32 is much more than the system can paralleize. I start
getting dimishing returns past -j4, even on dual proc systems. When you
hit the rescue build you will be SORRY :)
If you want to do load tests, launch multiple parallel buildworlds with
differing MAKEOBJDIRPREFIX.
--
Doug White | FreeBSD: The Power to Serve
dwhite at gumbysoft.com | www.FreeBSD.org
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