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Re: Performance on new 64bit server compared to my 32bit desktop

From: Greg Smith <greg(at)2ndquadrant(dot)com>
To: Jose Ildefonso Camargo Tolosa <ildefonso(dot)camargo(at)gmail(dot)com>
Cc: Scott Carey <scott(at)richrelevance(dot)com>, Philippe Rimbault <primbault(at)edd(dot)fr>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Performance on new 64bit server compared to my 32bit desktop
Date: 2010-08-30 05:01:10
Message-ID: 4C7B3B16.2030207@2ndquadrant.com (view raw or flat)
Thread:
Lists: pgsql-performance
Greg Smith wrote:
> He's been seeing >75GB/s of aggregate memory bandwidth out of that 
> monster--using gcc, so even at a disadvantage compared to the Intel 
> one used for that report.

On second read this was confusing.  The best STREAM results from using 
the Intel compiler on Linux.  The ones I've been doing and that Scott 
has been running are using regular gcc instead.  So when the new AMD 
system is clearing 75MB/s in the little test set I'm trying to get 
automated, that's actually a conservative figure, given that a compiler 
swap is almost guaranteed to boost results a bit too.

-- 
Greg Smith  2ndQuadrant US  Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com   www.2ndQuadrant.us


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