From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eran Rom Subject: Re: [RFC] vhost-blk implementation Date: Fri, 26 Mar 2010 18:53:31 +0000 (UTC) Message-ID: References: <1269306023.7931.72.camel@badari-desktop> <20100324200402.GA22272@infradead.org> <4BAA748D.40509@us.ibm.com> <20100325155700.GB1504@infradead.org> 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]:60432 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751246Ab0CZSxn (ORCPT ); Fri, 26 Mar 2010 14:53:43 -0400 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1NvEf7-0006Li-SQ for kvm@vger.kernel.org; Fri, 26 Mar 2010 19:53:42 +0100 Received: from 224.143.91-QoS-core.in-addr.arpa ([224.143.91-QoS-core.in-addr.arpa]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 26 Mar 2010 19:53:41 +0100 Received: from eranr by 224.143.91-QoS-core.in-addr.arpa with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 26 Mar 2010 19:53:41 +0100 Sender: kvm-owner@vger.kernel.org List-ID: Christoph Hellwig infradead.org> writes: > Ok. cache=writeback performance is something I haven't bothered looking > at at all. For cache=none any streaming write or random workload with > large enough record sizes got basically the same performance as native > using kernel aio, and same for write but slightly degraded for reads > using the thread pool. See my attached JLS presentation for some > numbers. > Looks like the presentation did not make it... Thanks, Eran