Re: buildworld times

On Sun, 29 Feb 2004, Andre Guibert de Bruet wrote:

> On Sat, 28 Feb 2004, Vincent Poy wrote:
>
> > On Sat, 28 Feb 2004, Don Lewis wrote:
> > >
> > > My 1.5 GHz Pentium-M laptop, with 512 MB RAM, and a 5400 RPM drive, also
> > > running 5.2-CURRENT with the kernel options:
> > > 	SCHED_ULE
> > > 	INVARIANTS
> > > 	INVARIANT_SUPPORT
> > > 	WITNESS
> > > 	WITNESS_SKIPSPIN
> > > 	ACPI_DEBUG
> > > and no /etc/malloc.conf runs buildworld in
> > > 2067.708u 1323.742s 1:01:24.53 92.0%    2816+1833k 23350+5985io 8841pf+0w
> > >
> > > In both cases this was a "make buildworld" with no options (no -j).
> >
> > 	Hmm, that is weird since I know the WITNESS options are supposedly
> > going to slow down the buildworld process but maybe the thing is that the
> > Pentium-M processor runs cooler as the P4m-2.6Ghz CPU does hit 83C degrees
> > and that's when it chokes as I noticed on a identical windows machine.
>
> If you're hitting 80+ degrees, your CPU is going to throttle to keep the
> temperature down. This is likely to be the cause (or at least a good
> contributor) of the large buildworld times you're seeing. You might want
> to look into improved cooling, possibly water-cooling. :-)

	This is actually a notebook and not a desktop machine so the temps
are higher than the desktop counterparts as my desktop P4C3.2 at 3.8Ghz
runs at 50C full load.  The P4M-2.6Ghz mobile processor runs at 63C even
when idle.  It might be the Thermal Interface Material just needs
replacing or something.  Is there a way to monitor the temperatures of the
CPU since I do notice the load time averages moves up the the 6.xx when
using -j4.


Cheers,
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