From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Subject: Re: [parisc-linux] DIFF use 6-regs in copy_user_page_asm Date: Tue, 4 Jan 2005 09:02:27 -0700 Message-ID: <20050104160227.GA28074@colo.lackof.org> References: <20050103061910.GJ15061@colo.lackof.org> <20050104061342.GE18497@tausq.org> <200501040851.19806.mszick@wolfbutter.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: parisc-linux@lists.parisc-linux.org To: "Michael S. Zick" Return-Path: In-Reply-To: <200501040851.19806.mszick@wolfbutter.com> 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 Tue, Jan 04, 2005 at 08:51:19AM -0600, Michael S. Zick wrote: > One other possibility to keep in mind when testing: this is an > io sequence, no heavy register-register computations. Not entirely. Sure, to load data into cache it's "io". But the bulk of the loop is to move data from one cacheline to another. > You might have to borrow a buss analyzer from the hardware > lab to see if this is effecting your tests. I don't. If 6-regs works better then I use it. If CPU performance counter support worked, we could figure out where the bottlenecks were for both cases. grant _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux