Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754488AbbKMD1c (ORCPT ); Thu, 12 Nov 2015 22:27:32 -0500 Received: from mail-yk0-f182.google.com ([209.85.160.182]:35330 "EHLO mail-yk0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754220AbbKMD1a (ORCPT ); Thu, 12 Nov 2015 22:27:30 -0500 MIME-Version: 1.0 In-Reply-To: <20151112150238.GO12392@sirena.org.uk> References: <20151112122400.GB27454@quack.suse.cz> <4436790.rotQ3a7v5c@wuerfel> <20151112150238.GO12392@sirena.org.uk> Date: Fri, 13 Nov 2015 11:27:29 +0800 Message-ID: Subject: Re: [PATCH 0/2] Introduce the request handling for dm-crypt From: Baolin Wang To: Mark Brown Cc: Arnd Bergmann , Jan Kara , Christoph Hellwig , Jens Axboe , Alasdair G Kergon , Mike Snitzer , dm-devel@redhat.com, neilb@suse.com, tj@kernel.org, jmoyer@redhat.com, keith.busch@intel.com, bart.vanassche@sandisk.com, linux-raid@vger.kernel.org, "Garg, Dinesh" , LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1113 Lines: 29 On 12 November 2015 at 23:02, Mark Brown wrote: > On Thu, Nov 12, 2015 at 01:57:27PM +0100, Arnd Bergmann wrote: >> On Thursday 12 November 2015 20:51:10 Baolin Wang wrote: > >> > But it maybe not enough for HW engine which can handle maybe 10M/20M >> > at one time. > >> Given that you have already done measurements, can you find out how much >> you lose in overall performance with your existing patch if you artificially >> limit the maximum size to sizes like 256kb, 1MB, 4MB, ...? > > It's probably also worth looking at the impact on CPU utilisation as > well as throughput in your benchmarking since the system will often not > be idle when it's doing a lot of I/O - I know you've done some > measurements in that area before, including them when looking at block > sizes might be interesting. Make sense. -- Baolin.wang Best Regards -- 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/