Re: Spinlocks and CPU Architectures - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: Spinlocks and CPU Architectures
Date
Msg-id 1129053343.8300.497.camel@localhost.localdomain
Whole thread Raw
In response to Re: Spinlocks and CPU Architectures  (Peter Eisentraut <peter_e@gmx.net>)
Responses Re: Spinlocks and CPU Architectures
Re: Spinlocks and CPU Architectures
List pgsql-hackers
On Tue, 2005-10-11 at 18:45 +0200, Peter Eisentraut wrote:
> Tom Lane wrote:
> > This seems pretty unworkable from a packaging standpoint.  Even if
> > you teach autoconf how to tell which model it's running on, there's
> > no guarantee that the resulting executables will be used on that same
> > machine.
> 
> A number of packages in the video area (and perhaps others) do compile 
> "sub-architecture" specific variants.  This could be done for 
> PostgreSQL, but you'd probably need to show some pretty convincing 
> performance numbers before people start the packaging effort.

I completely agree, just note that we already have some cases where
convincing performance numbers exist. 

Tom is suggesting having different behaviour for x86 and x86_64. The x86
will still run on x86_64 architecture would it not? So we'll have two
binaries for each OS, yes?

In general, where we do find a clear difference, we should at very least
identify/record which variant the binary is most suitable for. At best
we could produce different executables, but I understand the packaging
effort required to do that.

Best Regards, Simon Riggs





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