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=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 861A0C49EBF for ; Tue, 8 Jun 2021 18:44:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 722C9616E8 for ; Tue, 8 Jun 2021 18:44:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234319AbhFHSp7 (ORCPT ); Tue, 8 Jun 2021 14:45:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:37970 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235495AbhFHSn5 (ORCPT ); Tue, 8 Jun 2021 14:43:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7591261446; Tue, 8 Jun 2021 18:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623177372; bh=hGuWvDy+JMcgfSq6kPRUR+GVkKqIDaLJ5Xcsn4Ousss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vLas7c2lc1kkTNxdaxG61FUTWhuzExQLTC3AvG7UYptB7mrIr4EtxD6Pb/yChX9IP OYEiDICo5Dqn/3LWotTPuiU17YZAtEhcWqnwbe+/7a6ZMlMmqLPhLSFBuX8JgWl5lQ LISKoUNg3F4VUeHBJrzanRKADvhOkdK3LYcUeazg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Magnus Karlsson , George Kuruvinakunnel , Tony Nguyen , Sasha Levin Subject: [PATCH 5.4 28/78] i40e: optimize for XDP_REDIRECT in xsk path Date: Tue, 8 Jun 2021 20:26:57 +0200 Message-Id: <20210608175936.214812283@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210608175935.254388043@linuxfoundation.org> References: <20210608175935.254388043@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Magnus Karlsson [ Upstream commit 346497c78d15cdd5bdc3b642a895009359e5457f ] Optimize i40e_run_xdp_zc() for the XDP program verdict being XDP_REDIRECT in the xsk zero-copy path. This path is only used when having AF_XDP zero-copy on and in that case most packets will be directed to user space. This provides a little over 100k extra packets in throughput on my server when running l2fwd in xdpsock. Signed-off-by: Magnus Karlsson Tested-by: George Kuruvinakunnel Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index c9d4534fbdf0..17499c0d10bb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -212,6 +212,13 @@ static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp) xdp->handle = xsk_umem_adjust_offset(umem, xdp->handle, offset); + if (likely(act == XDP_REDIRECT)) { + err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); + result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED; + rcu_read_unlock(); + return result; + } + switch (act) { case XDP_PASS: break; @@ -219,10 +226,6 @@ static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp) xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index]; result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring); break; - case XDP_REDIRECT: - err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); - result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED; - break; default: bpf_warn_invalid_xdp_action(act); /* fall through */ -- 2.30.2