From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39142) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c6OEY-0007mW-ES for qemu-devel@nongnu.org; Mon, 14 Nov 2016 15:52:10 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c6OEX-0004fy-Ms for qemu-devel@nongnu.org; Mon, 14 Nov 2016 15:52:06 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48928) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c6OEX-0004fp-Gj for qemu-devel@nongnu.org; Mon, 14 Nov 2016 15:52:05 -0500 References: <1478711602-12620-1-git-send-email-stefanha@redhat.com> <5826231D.7070208@redhat.com> <20161114152642.GE26198@stefanha-x1.localdomain> <1cab4d7b-ee50-3072-8751-1acde759d419@redhat.com> From: Paolo Bonzini Message-ID: <7d65b41d-f4f8-0aee-53d5-4d6401fe89e8@redhat.com> Date: Mon, 14 Nov 2016 21:52:00 +0100 MIME-Version: 1.0 In-Reply-To: <1cab4d7b-ee50-3072-8751-1acde759d419@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC 0/3] aio: experimental virtio-blk polling mode List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: krister@redhat.com, Stefan Hajnoczi Cc: Stefan Hajnoczi , qemu-devel@nongnu.org, Andrew Theurer , Fam Zheng On 14/11/2016 21:12, Karl Rister wrote: > 256 46,929 > 512 35,627 > 1,024 46,477 > 2,000 35,247 > 2,048 46,322 > 4,000 46,540 > 4,096 46,368 > 8,000 47,054 > 8,192 46,671 > 16,000 46,466 > 16,384 32,504 > 32,000 20,620 > 32,768 20,807 Huh, it breaks down exactly when it should start going faster (10^9/46000 = ~21000). Paolo