From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [PATCH] Fix NUMA Memory Policy Reference Counting From: Lee Schermerhorn In-Reply-To: References: <20070830185053.22619.96398.sendpatchset@localhost> <1190055637.5460.105.camel@localhost> Content-Type: text/plain Date: Mon, 17 Sep 2007 15:38:05 -0400 Message-Id: <1190057885.5460.134.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-mm@kvack.org, akpm@linux-foundation.org, ak@suse.de, eric.whitney@hp.com, Mel Gorman List-ID: On Mon, 2007-09-17 at 12:14 -0700, Christoph Lameter wrote: > On Mon, 17 Sep 2007, Lee Schermerhorn wrote: > > > Page allocation micro-benchmark: > > > > Time to fault in 256K 16k pages [ia64] into a 4G anon segment. > > You need to run this as a test that concurrently allocates these pages > from as many processors as possible in a common address space. A single > thread will not cause cache line bouncing. I suspect this will cause an > additional issue than what we already have with mmap_sem locking. > Yeah, I'll have to write a custom, multithreaded test for this, or enhance memtoy to attach shm segments by id and run lots of them together. I'll try to get to it asap. Lee -- 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