Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754939AbbKETuW (ORCPT ); Thu, 5 Nov 2015 14:50:22 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:19025 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751819AbbKETuU (ORCPT ); Thu, 5 Nov 2015 14:50:20 -0500 Date: Thu, 5 Nov 2015 14:50:07 -0500 From: Konrad Rzeszutek Wilk To: Bob Liu Cc: xen-devel@lists.xen.org, linux-kernel@vger.kernel.org, roger.pau@citrix.com, felipe.franciosi@citrix.com, axboe@fb.com, avanzini.arianna@gmail.com, rafal.mielniczuk@citrix.com, jonathan.davies@citrix.com, david.vrabel@citrix.com Subject: Re: [PATCH v4 10/10] xen/blkback: make pool of persistent grants and free pages per-queue Message-ID: <20151105195000.GA3559@x230.dumpdata.com> References: <1446438106-20171-1-git-send-email-bob.liu@oracle.com> <1446438106-20171-11-git-send-email-bob.liu@oracle.com> <20151105024314.GD3949@x230.dumpdata.com> <563AC2ED.8020205@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <563AC2ED.8020205@oracle.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1100 Lines: 33 On Thu, Nov 05, 2015 at 10:46:05AM +0800, Bob Liu wrote: > > On 11/05/2015 10:43 AM, Konrad Rzeszutek Wilk wrote: > > On Mon, Nov 02, 2015 at 12:21:46PM +0800, Bob Liu wrote: > >> Make pool of persistent grants and free pages per-queue/ring instead of > >> per-device to get better scalability. > > > > How much better scalability do we get? > > > > Which already showed in [00/10], I paste them here: > > domU(orig) 4 queues 8 queues 16 queues > iops: 690k 1024k(+30%) 800k 750k > > > After patch 9 and 10: > domU(orig) 4 queues 8 queues 16 queues > iops: 690k 1600k(+100%) 1450k 1320k And if you split it? As in only patch 9? If you could - please mention in the description that with 4 queues with this patch you get 100% increase in IOPS. > > Chart: https://www.dropbox.com/s/agrcy2pbzbsvmwv/iops.png?dl=0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/