From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 13 Feb 2008 12:09:18 -0800 (PST) From: Christoph Lameter Subject: Re: Fastpath prototype? In-Reply-To: <47B2D6AB.1020408@suse.de> Message-ID: References: <20080211235607.GA27320@wotan.suse.de> <200802121140.12040.ak@suse.de> <47B2D6AB.1020408@suse.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Nick Piggin , Andrew Morton , Mel Gorman , linux-mm@kvack.org, Pekka J Enberg List-ID: On Wed, 13 Feb 2008, Andi Kleen wrote: > > tbench/SLUB: 726.25 MB/sec > > > > Even adding the fast path prototype (covers only slab allocs >=4K > > allocs) yields only 1825.68 MB/sec > > So why is the new fast path slower than the old one? Because it is not > NUMA aware? No because it only covers kmalloc-4096 and nothing else. All other allocations go to the now queueless page allocator. -- 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