From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id DEEB1A0505; Tue, 17 May 2022 12:52:02 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id BFCF840042; Tue, 17 May 2022 12:52:02 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id 9035040041 for ; Tue, 17 May 2022 12:52:01 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E8B841042; Tue, 17 May 2022 03:52:00 -0700 (PDT) Received: from net-arm-n1amp-02.shanghai.arm.com (net-arm-n1amp-02.shanghai.arm.com [10.169.210.142]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5C16C3F66F; Tue, 17 May 2022 03:51:59 -0700 (PDT) From: Joyce Kong To: Cc: ruifeng.wang@arm.com, dev@dpdk.org, nd@arm.com, Joyce Kong Subject: [PATCH v1 0/2] add a fast path for memif Rx/Tx Date: Tue, 17 May 2022 10:51:07 +0000 Message-Id: <20220517105109.1086090-1-joyce.kong@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220412093243.3670187-1-joyce.kong@arm.com> References: <20220412093243.3670187-1-joyce.kong@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org For memif non-zero-copy mode, there is a branch to compare the mbuf and memif buffer size during memory copying. Add a fast memory copy path by removing this branch with mbuf and memif buffer size defined at compile time. And for Tx fast path, bulk free the mbufs which come from the same mempool. When mbuf == memif buffer size, both Rx/Tx would choose the fast memcpy path. When mbuf < memif buffer size, the Rx chooses previous memcpy path while Tx chooses fast memcpy path. When mbuf > memif buffer size, the Rx chooses fast memcpy path while Tx chooses previous memcpy path. Test with 1p1q on Ampere Altra AArch64 server, --------------------------------------------------------- buf size | memif = mbuf | memif < mbuf | memif > mbuf --------------------------------------------------------- non-zc gain | 16.95% | 3.28% | 13.29% --------------------------------------------------------- zc gain | 19.43% | 4.62% | 18.14% --------------------------------------------------------- Test with 1p1q on Cascade Lake Xeon X86server, --------------------------------------------------------- buf size | memif = mbuf | memif < mbuf | memif > mbuf --------------------------------------------------------- non-zc gain | 19.97% | 2.35% | 21.43% --------------------------------------------------------- zc gain | 14.30% | -1.21% | 11.98% --------------------------------------------------------- Joyce Kong (2): net/memif: add a Rx fast path net/memif: add a Tx fast path drivers/net/memif/rte_eth_memif.c | 258 ++++++++++++++++++++---------- 1 file changed, 176 insertions(+), 82 deletions(-) -- 2.25.1