From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69442C433DB for ; Tue, 23 Feb 2021 20:56:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23F4364E7A for ; Tue, 23 Feb 2021 20:56:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231853AbhBWU4h (ORCPT ); Tue, 23 Feb 2021 15:56:37 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:47768 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232731AbhBWU4f (ORCPT ); Tue, 23 Feb 2021 15:56:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614113706; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=3KQm+JOWkfPiKVoQVNaYknjcLG60hXdaozKJjWzOFB4=; b=Fdm0gUmPJq/hexoeZVg10qD58t5eetnmjWBEn0xjjfNh6HMfjRuUwoZWxXZ+s4BmiHC5y5 Kfaj7rV9MiZndDCctd2TF1cN+6neqU03+OUKA3u2SI5f8ZlsAeNa85y6frApb5qE+MVvp1 BLiPanwN+fJxGAXiLDH2sRq65A9lB80= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-485-RA_jcdehPuyLDWI0HEbfYA-1; Tue, 23 Feb 2021 15:54:46 -0500 X-MC-Unique: RA_jcdehPuyLDWI0HEbfYA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D3C17835E22; Tue, 23 Feb 2021 20:54:44 +0000 (UTC) Received: from localhost (unknown [10.18.25.174]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 51A6D5D9D3; Tue, 23 Feb 2021 20:54:35 +0000 (UTC) Date: Tue, 23 Feb 2021 15:54:34 -0500 From: Mike Snitzer To: JeffleXu Cc: axboe@kernel.dk, hch@lst.de, ming.lei@redhat.com, linux-block@vger.kernel.org, dm-devel@redhat.com, io-uring@vger.kernel.org, joseph.qi@linux.alibaba.com, caspar@linux.alibaba.com, Mikulas Patocka Subject: Re: [PATCH v4 00/12] dm: support IO polling Message-ID: <20210223205434.GB25684@redhat.com> References: <20210220110637.50305-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Mon, Feb 22 2021 at 10:55pm -0500, JeffleXu wrote: > > > On 2/20/21 7:06 PM, Jeffle Xu wrote: > > [Changes since v3] > > - newly add patch 7 and patch 11, as a new optimization improving > > performance of multiple polling processes. Now performance of multiple > > polling processes can be as scalable as single polling process (~30%). > > Refer to the following [Performance] chapter for more details. > > > > Hi Mike, would please evaluate this new version patch set? I think this > mechanism is near maturity, since multi-thread performance is as > scalable as single-thread (~30%) now. OK, can do. But first I think you need to repost with a v5 that addresses Mikulas' v3 feedback: https://listman.redhat.com/archives/dm-devel/2021-February/msg00254.html https://listman.redhat.com/archives/dm-devel/2021-February/msg00255.html Mike