From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Subject: Re: [parisc-linux] B132L outperforms C160 - 64-bit userland needed? Date: Sat, 20 Aug 2005 00:21:35 -0600 Message-ID: <20050820062135.GA28839@colo.lackof.org> References: <4301B090.9040405@excelcia.org> <20050817061913.GA8761@colo.lackof.org> <430384FE.6080105@excelcia.org> <20050817194058.GA3378@netfall.com> <43041C3C.2080704@excelcia.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: parisc-linux@lists.parisc-linux.org To: Kurt Fitzner Return-Path: In-Reply-To: <43041C3C.2080704@excelcia.org> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.org On Wed, Aug 17, 2005 at 11:27:24PM -0600, Kurt Fitzner wrote: ... > Next off, for nbench running on a C160/HPUX I see a memory throughput > increase of 2.67X, integer calc increase of 1.4X, and floating point > increase of 2.24X when compared to the C160/Linux. ... > The performance issue on my C160/Linux was not due cache line > loading/thrashing. ... > What really locked it in for me that it's an OS issue, ... It clearly is an OS issue. And thinking about it more, I'm convinced this benchmark is exposing a cache utilization (or lack thereof) issue. HPUX is very efficient at NOT flushing the cache. Linux flushes alot more. thanks, grant _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux