From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id C77F560032A for ; Thu, 20 May 2010 16:11:26 -0400 (EDT) Date: Thu, 20 May 2010 14:11:22 -0600 From: Matthew Wilcox Subject: Re: [RFC PATCH] fuse: support splice() reading from fuse device Message-ID: <20100520201122.GL10452@parisc-linux.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: Miklos Szeredi Cc: Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, jens.axboe@oracle.com, akpm@linux-foundation.org List-ID: On Thu, May 20, 2010 at 10:07:23PM +0200, Miklos Szeredi wrote: > > It says nothing at all, in short. You need to have a real source, and a > > real destination. Not some empty filesystem and /dev/null destination. > > Sure, I will do that. It's just a lot harder to measure the effects > on hardware I have access to, where the CPU speed is just damn too > large compared to I/O speed. Try running a CPU burner on all the cores. Something that's low priority, so it'll be preempted by FUSE, and doesn't consume much cache. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- 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