From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 27F4AA04BC; Thu, 8 Oct 2020 09:28:46 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 9939D1B850; Thu, 8 Oct 2020 09:28:44 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by dpdk.org (Postfix) with ESMTP id ECC7D1B81B for ; Thu, 8 Oct 2020 09:28:41 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602142119; 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=l+FKvc7nBf47brkKGlxLoWE1CCaPk6gtP3LbRqZjHXM=; b=Tt08+vz4vGRTuuvkEFlz29a1ow2XLeoCkNSXU1RGmXanInGE4cx46PmXBABrqSaAM4oXX+ Pose76Wn11pvINszX/jXuVOG+N9iXIA2AI1nF5UCM6ArM7HKDg9H/rcKho9sc1Ho/85q4a fwJ/nNDyYpBDi2ykYOh2OcoI64KUHJI= Received: from mail-vk1-f197.google.com (mail-vk1-f197.google.com [209.85.221.197]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-441-J7ZGE-KVOOSu4D_D5np-PA-1; Thu, 08 Oct 2020 03:28:36 -0400 X-MC-Unique: J7ZGE-KVOOSu4D_D5np-PA-1 Received: by mail-vk1-f197.google.com with SMTP id b138so780355vkf.10 for ; Thu, 08 Oct 2020 00:28:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=l+FKvc7nBf47brkKGlxLoWE1CCaPk6gtP3LbRqZjHXM=; b=dwoQ8pz3ZIFoEsdJI/+sZ1dLHqnuxIFXPCn/Um+v/5jJSXRECI4GxeyT1jDHmw7sUl wak67won1cBQ3DrEUnITvuZlOof/6MqVj3il/gAHnImHtIfZAWr9Gdaoq/qYQ3VHXHcE jKX0P9dmS+7gqrGueOzsvzaX4wfLwUgEaQEYsElm7dQ6KpkPXqYFb9xHR8qc6PKGpexX L9GW79E0pkxwCOtz1vuRcnGyNo7lbCuXE7x9ECQygBcnjf3zVtbuZUjsdun0hh4bE/4P 5qNMmZmKVt4xQ0WYWc6E6MkDZ5vy/40O+P3xBIiUnkX9HexI37YicvZjk8dnLa/9AvK1 /N+w== X-Gm-Message-State: AOAM533dE2ThMFSz1fdmokV1eRsaMOgBF1h8ZilNlWyVGMKJjYt+K/Sg vJbc9GHHMMcqddUvhgQtyc3oS7uuNTx3V35YJNAxyh9H3QDnP+HMSrWw9vYvAXfTvHlM9bFVhfU h/ziQv0igOZ1MAQmMFlk= X-Received: by 2002:a1f:e905:: with SMTP id g5mr3799105vkh.17.1602142115461; Thu, 08 Oct 2020 00:28:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwkhFYm25ku5pSg1AElhGnXflNJbDwjwA+b+pF0wRclpklfJtBxiPRQeVdiijCkrG0QlG14flHGsnTsbA350VU= X-Received: by 2002:a1f:e905:: with SMTP id g5mr3799094vkh.17.1602142115266; Thu, 08 Oct 2020 00:28:35 -0700 (PDT) MIME-Version: 1.0 References: <1591870283-7776-1-git-send-email-radu.nicolau@intel.com> <20200923142253.18853-1-radu.nicolau@intel.com> In-Reply-To: <20200923142253.18853-1-radu.nicolau@intel.com> From: David Marchand Date: Thu, 8 Oct 2020 09:28:24 +0200 Message-ID: To: Radu Nicolau Cc: dev , Beilei Xing , Jeff Guo , Bruce Richardson , "Ananyev, Konstantin" , Jerin Jacob , "Trahe, Fiona" , Wei Zhao , "Ruifeng Wang (Arm Technology China)" , Qiming Yang , Qi Zhang , "Yigit, Ferruh" , Akhil Goyal , David Christensen Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dmarchan@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Subject: Re: [dpdk-dev] [PATCH v12 0/5] eal: add WC store functions X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Wed, Sep 23, 2020 at 4:23 PM Radu Nicolau wrote: > > Implement 2 new functions that will enable write combining > stores depending on architecture. The functions are provided > as a generic stub and a x86 specific implementation. > > The reason to implement these functions is to improve performance > by reducing the overhead associated with regular mmio writes when > updating the hardware queue tails and doorbells. For the record, on which CPU/platform was this tested and how much of an improvement did you get with this? I did not see review/ack tokens from other arch maintainers, but since it has been on the ml for a while, I guess I can proceed as is. > > With this patch set the I40E, ICE, IXGBE and QAT PMDs are updated to > use the write combining store functions with other PMDs to follow. This series will go through the main repo: copying Ferruh and Akhil for info. -- David Marchand