From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 17 Aug 2005 17:47:20 -0700 From: Andrew Morton Subject: Re: pagefault scalability patches Message-Id: <20050817174720.47ac351f.akpm@osdl.org> In-Reply-To: References: <20050817151723.48c948c7.akpm@osdl.org> <20050817163030.15e819dd.akpm@osdl.org> <20050817164456.77e8b85e.akpm@osdl.org> <17155.52686.309135.906824@wombat.chubb.wattle.id.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: peterc@gelato.unsw.edu.au, torvalds@osdl.org, hugh@veritas.com, piggin@cyberone.com.au, linux-mm@kvack.org List-ID: Christoph Lameter wrote: > > On Thu, 18 Aug 2005, Peter Chubb wrote: > > > >>>>> "Andrew" == Andrew Morton writes: > > > > Andrew> The decreases in system CPU time for the single-threaded case > > Andrew> are extraordinarily high. > > > > Are the sizes of the test the same? The unpatched version says 16G, > > the patched one 4G --- with a quarter the memory size I'd expect less > > than a quarter of the overhead... > > Yup I screwed up. > > Patched: > > Gb Rep Threads User System Wall flt/cpu/s fault/wsec > 16 3 1 0.859s 64.994s 65.084s 47768.542 47771.664 Versus: > Unpatched: > > Gb Rep Threads User System Wall flt/cpu/s fault/wsec > 16 3 1 0.757s 62.772s 63.052s 49515.393 49522.112 It got slower? -- 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