From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id B2DAC60032A for ; Thu, 20 May 2010 16:22:15 -0400 (EDT) In-reply-to: <20100520201122.GL10452@parisc-linux.org> (message from Matthew Wilcox on Thu, 20 May 2010 14:11:22 -0600) Subject: Re: [RFC PATCH] fuse: support splice() reading from fuse device References: <20100520201122.GL10452@parisc-linux.org> Message-Id: From: Miklos Szeredi Date: Thu, 20 May 2010 22:22:05 +0200 Sender: owner-linux-mm@kvack.org To: Matthew Wilcox Cc: miklos@szeredi.hu, torvalds@linux-foundation.org, 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, 20 May 2010, Matthew Wilcox wrote: > 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. Umm, that doesn't really make the CPU any slower, it just makes it consume more power. Miklos -- 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