From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eran Rom Subject: Re: [RFC] vhost-blk implementation Date: Tue, 23 Mar 2010 10:09:26 +0000 (UTC) Message-ID: References: <1269306023.7931.72.camel@badari-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from lo.gmane.org ([80.91.229.12]:51615 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751780Ab0CWKKb (ORCPT ); Tue, 23 Mar 2010 06:10:31 -0400 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Nu13q-0001o7-Q9 for kvm@vger.kernel.org; Tue, 23 Mar 2010 11:10:11 +0100 Received: from nesher3.haifa.il.ibm.com ([192.114.107.4]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 23 Mar 2010 11:10:10 +0100 Received: from eranr by nesher3.haifa.il.ibm.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 23 Mar 2010 11:10:10 +0100 Sender: kvm-owner@vger.kernel.org List-ID: > with vhost-blk: > ---------------- > > # time dd if=/dev/vda of=/dev/null bs=128k iflag=direct > 640000+0 records in > 640000+0 records out > 83886080000 bytes (84 GB) copied, 126.135 seconds, 665 MB/s > > # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct > Can you please check both read & write with cache=off, bs=128k Thanks very much, Eran