buildworld times

[Andre Guibert de Bruet]

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. :-)

Regards,
Andy

> Andre Guibert de Bruet | Enterprise Software Consultant >
> Silicon Landmark, LLC. | http://siliconlandmark.com/    >