From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 15 Sep 2005 14:54:33 +0200 From: Pavel Machek 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: Sender: owner-linux-mm@kvack.org Return-Path: 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 List-ID: 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org