Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030414AbVIONXM (ORCPT ); Thu, 15 Sep 2005 09:23:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030416AbVIONXM (ORCPT ); Thu, 15 Sep 2005 09:23:12 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:50311 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S1030414AbVIONXL (ORCPT ); Thu, 15 Sep 2005 09:23:11 -0400 Date: Thu, 15 Sep 2005 14:54:33 +0200 From: Pavel Machek To: Christoph Lameter Cc: torvalds@osdl.org, akpm@osdl.org, nickpiggin@yahoo.com.au, hugh@veritas.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: Hugh's alternate page fault scalability approach on 512p Altix Message-ID: <20050915125433.GA468@openzaurus.ucw.cz> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 738 Lines: 19 Hi! > 2. The use rss and anon_rss deltas instead of atomic incs brings small > performance enhancements in the lower cpu ranges (1-32) but hurt (%50 > performance drop at 512 processors) in the high range. The hurting may > be due to the percularities of SGIs NUMA router architecture and the I'd say that 50% drop at 512 CPUs is acceptable. I did not even know we support that many CPUs. Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/