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Re: gcc build / test times on multi-core hosts?
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Joern Rennecke <amylaar at spamcop dot net>
- Cc: Marcin Dalecki <martin at dalecki dot de>, Joern RENNECKE <joern dot rennecke at st dot com>, gcc at gcc dot gnu dot org
- Date: Sat, 18 Feb 2006 07:23:36 -0800
- Subject: Re: gcc build / test times on multi-core hosts?
- References: <20060218092336.r6ey7eo00o4008k4@webmail.spamcop.net>
On Sat, Feb 18, 2006 at 09:23:36AM -0500, Joern Rennecke wrote:
> In http://gcc.gnu.org/ml/gcc/2006-02/msg00357.html, you wrote:
>
> > In fact the "gamer" benchmarks you are dissing are quite well reflecting the
> very kind
> > of coding excessively found in GCC itself. Some observations suggest
> > the you should aim at the CPU with the biggest L2-cache size affordable. In
> particular
> > comparision on the older Athlon XP line where very conclusive here as there
> where similarly rated CPUs available with 256kB vers. 512kB caches. Usually the
> 512k where 20% faster on GCC build loads then the ones with smaller caches
> despite beeing significantly lower clocked.
>
> By that token, the Pentium D 920 should trounce the Athlon X2 3800+ . But
> that's
> not what these benchmarks show.
My 2GHz Yonah with 2MB cache and 2GB RAM holds its own against other
dual core/CPU machines I have when doing gcc build/check, although its
harddrive is slow. With a faster drive, it may be one of the fatest
32bit dual core/CPU machines for gcc build/check. It is also very
quiet.
H.J.