Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp1833526rwd; Thu, 18 May 2023 18:54:12 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7CPHLByEpguFYiDkbMUZ7SBkaogOKT/iIlQyV0xyGQG3fDhx2ZK7S4H83BGZpYt40Z73Rp X-Received: by 2002:a17:90a:ca16:b0:24d:ecf7:cabb with SMTP id x22-20020a17090aca1600b0024decf7cabbmr503944pjt.22.1684461252506; Thu, 18 May 2023 18:54:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1684461252; cv=none; d=google.com; s=arc-20160816; b=byoLZplxg1W+JFLFDZt7P7ItoVieWaiic21YGvaqVTMB04CQyRzSu/Qxk3B/P4Ruo/ lcgyl5le6zDa6rFC4cetfltdCpkWEuYG0O1F6f5tbm7SWQnzf9/6HZpaODwXJJhkd1+5 hm7aou6J/+v9sht2ZiSZ8TcIp1D1im/nnMV2JrOP0udTkb+FcwBOKrYrc2/0HRC+MwbS IYsBZ2BmPeRj9wFeD+GcbjVLNBM1p02XVchPjXwvIQeoFG9NR1omR5/siPpphpo7SYZb OS9z2TLymph5qpBrnqyWfZCTzoE2MIxk6atsc+vQcmJF0NRZ2I3hlnBo7DuFQKFF2N8M dQHw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject; bh=qGUfXhr8cdrXNXhy1tXwp0DJUroY0oYCXI8xjTNTz40=; b=SvX0am0zlnxMfkcdwWMLqTJqtPhhFdVvKRJhyW2D8PZKIEdb0lfDOdBzHKB97Z3IYD +pq7hJq7prPM4NygXq7ZLbosVpsf3WGK0QGDokzzIw7pcPkPfDQtyKhTPbrQdD5KIquX RyZcBVLt1U9GQw7AtKuOBX4fbz3vuLvvRB3LhC9wXU+2anJhoTHUguCKHqv9hvlaACHQ 7HJ/lIDqIZDYk76ZZ1Wb+EiVWyPo7NpTlDWskI8shgZITJe/rTCiyFedfatFyZpz5b5/ n6gAXqZSoICmcr5n97c3M54vQOSulTJeL9zJ2fTph+jBauH33HH0hQnqn+ZuDs35bICH 3Eag== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id f10-20020a17090a664a00b0023699c44b66si769305pjm.167.2023.05.18.18.53.57; Thu, 18 May 2023 18:54:12 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229596AbjESBle (ORCPT + 99 others); Thu, 18 May 2023 21:41:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229458AbjESBld (ORCPT ); Thu, 18 May 2023 21:41:33 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D16510C2; Thu, 18 May 2023 18:41:32 -0700 (PDT) Received: from dggpemm500005.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4QMqFv5DGjzqSMN; Fri, 19 May 2023 09:37:07 +0800 (CST) Received: from [10.69.30.204] (10.69.30.204) by dggpemm500005.china.huawei.com (7.185.36.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Fri, 19 May 2023 09:41:30 +0800 Subject: Re: [PATCH net-next v2] octeontx2-pf: Add support for page pool To: Ratheesh Kannoth , , CC: , , , , , , , , References: <20230518055129.3129897-1-rkannoth@marvell.com> From: Yunsheng Lin Message-ID: <9b576dd4-6083-9fab-5859-875287831d0a@huawei.com> Date: Fri, 19 May 2023 09:41:30 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: <20230518055129.3129897-1-rkannoth@marvell.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.69.30.204] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500005.china.huawei.com (7.185.36.74) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,NICE_REPLY_A, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2023/5/18 13:51, Ratheesh Kannoth wrote: > Page pool for each rx queue enhance rx side performance > by reclaiming buffers back to each queue specific pool. DMA > mapping is done only for first allocation of buffers. > As subsequent buffers allocation avoid DMA mapping, > it results in performance improvement. > > Image | Performance with Linux kernel Packet Generator Is there any more detailed info for the performance data? 'kernel Packet Generator' means using pktgen module in the net/core/pktgen.c? it seems pktgen is more for tx, is there any abvious reason why the page pool optimization for rx have brought about ten times improvement? > ------------ | ----------------------------------------------- > Vannila | 3Mpps > | > with this | 42Mpps > change | > ------------------------------------------------------------- > ... > static int __otx2_alloc_rbuf(struct otx2_nic *pfvf, struct otx2_pool *pool, > dma_addr_t *dma) > { > u8 *buf; > > + if (pool->page_pool) > + return otx2_alloc_pool_buf(pfvf, pool, dma); > + > buf = napi_alloc_frag_align(pool->rbsize, OTX2_ALIGN); > if (unlikely(!buf)) > return -ENOMEM; It seems the above is dead code when using 'select PAGE_POOL', as PAGE_POOL config is always selected by the driver? > @@ -1205,10 +1226,28 @@ void otx2_sq_free_sqbs(struct otx2_nic *pfvf) > } > } > ... > @@ -1659,7 +1715,6 @@ int otx2_nix_config_bp(struct otx2_nic *pfvf, bool enable) > req->bpid_per_chan = 0; > #endif > > - Nit: unrelated change here. > return otx2_sync_mbox_msg(&pfvf->mbox); > }