Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753020AbdHKO6h (ORCPT ); Fri, 11 Aug 2017 10:58:37 -0400 Received: from mail-io0-f172.google.com ([209.85.223.172]:33277 "EHLO mail-io0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752765AbdHKO6f (ORCPT ); Fri, 11 Aug 2017 10:58:35 -0400 Subject: Re: [PATCH BUGFIX/IMPROVEMENT V2 0/2] block, bfq: improve and refactor throughput-boosting logic To: Paolo Valente Cc: linux-block , linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, broonie@kernel.org, lucmiccio@gmail.com References: <20170804053511.2389-1-paolo.valente@linaro.org> <66099037-D7F7-4803-B9A6-8A4866EAE43A@linaro.org> From: Jens Axboe Message-ID: Date: Fri, 11 Aug 2017 08:58:30 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <66099037-D7F7-4803-B9A6-8A4866EAE43A@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1231 Lines: 30 On 08/10/2017 01:55 PM, Paolo Valente wrote: > >> Il giorno 04 ago 2017, alle ore 07:35, Paolo Valente ha scritto: >> >> Hi, >> these two patches improve throughput-boosting logic in two >> aspects. The first patch refactors the parts of the device-idling >> logic, related to throughput boosting, that are still scattered across >> the source file bfq-iosched.c. The patch concetrates all the logic in >> one function. The second patch fixes/improves device idling for >> flash-based devices that have no internal queueing of I/O requests. >> >> The contribution in the first patch has been triggered by that in the >> second patch: finding the change made by the second patch has been >> more difficult than it had to be, because the logic that decides >> whether to idle the device is scattered across three functions. >> >> The second patch provides a significant throghput boost, for random >> I/O with flash-based non-queueing devices. For example, on a HiKey >> board, throughput increases by up to 125%, growing, e.g., from 6.9MB/s >> to 15.6MB/s with two or three random readers in parallel. >> > > Hi Jens, > any idea about the fate of these two patches? Queued up for 4.14. -- Jens Axboe