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=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 4042CCA9ECF for ; Fri, 18 Oct 2019 05:11:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 127C3222C6 for ; Fri, 18 Oct 2019 05:11:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QXtQOSFw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726595AbfJRFLP (ORCPT ); Fri, 18 Oct 2019 01:11:15 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:36568 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728069AbfJRFLP (ORCPT ); Fri, 18 Oct 2019 01:11:15 -0400 Received: by mail-pf1-f193.google.com with SMTP id y22so3101115pfr.3; Thu, 17 Oct 2019 22:11:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Lt7tB1LeS2Sex/M1UY8JvLWxPnjBGbRvOSpWI/WAnhY=; b=QXtQOSFwlpgYpLscplD6fS8aglXutf62lteg1WU9ZZfAiczK5JpzBC/uj4c6pZCrVi mLC5q+f+vFwCpsUNiZEQ1uxUxAN3UCSFg5SHqGDqwp9Kmgc9vRXxMcYHD0ndJLbgjnb8 4unNOzDzJjT1TM3Fr5Fzp72sxR+x0KUonP+H/KD83u+twq8ec16p8JoUU/uVTzhV79t3 ndXhFvfUFWbOnsHqNx6h4knny5/Ngrd6Mg3VzOrTpzdHv4oXuH5vCLyK6PiBfo1DMwsi Hz89jCBqPoUCqjv1wzPC2vYWFOf275cKZHiY3KW8cu7va1MdgcPeUz4bxjyYk96hyTDm l+XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Lt7tB1LeS2Sex/M1UY8JvLWxPnjBGbRvOSpWI/WAnhY=; b=J+VexhfHff1iG2985ZY8ixEf4eDb1lpJlSpGzD+vnFT1PANPCABO8Iwg9df7XcXed6 pJDmvfQ2f2f6B6FNvBsewDgj8SdtctfjHtAngFY4RjfYXzhynFkWb7VS9zSFOcn0Grue VdidbSqLezx+8eengjVMED/KyFDEx5XfU3UNadh3VFrFwjTRowHGsHKKepY8lDVZLmoB rnaOjA8oFwNwMKVnujHMgFWcgCAYPuD5WC3f8+O2CrSIa0AOvnPgbCf/bZCvq1SQtW+4 kX2IBmBVbBJrezC/kYaD7AJ5wRVaXagqVGeE9XEIXDQpphsajilQW9n0NdbrFeJPikzS XkgA== X-Gm-Message-State: APjAAAWWm2LD4AbgXza5tbulbEf1QqWodvugTBq1ifzdY5/KXoI3eQWk qtIe9jNWCZCGpo28oL2No1CQeuX8 X-Google-Smtp-Source: APXvYqyE+Nt0AFAIr6XgIzy9G75sgU6aYtXbvU7B0Yj2FMFQq8X+HLgJQbeIvbNHLsgOzTK4zp7PuQ== X-Received: by 2002:a17:90a:3628:: with SMTP id s37mr8608320pjb.38.1571371770338; Thu, 17 Oct 2019 21:09:30 -0700 (PDT) Received: from z400-fedora29.kern.oss.ntt.co.jp ([222.151.198.97]) by smtp.gmail.com with ESMTPSA id d11sm4341680pfo.104.2019.10.17.21.09.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2019 21:09:29 -0700 (PDT) From: Toshiaki Makita To: Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , "David S. Miller" , Jakub Kicinski , Jesper Dangaard Brouer , John Fastabend , Jamal Hadi Salim , Cong Wang , Jiri Pirko , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Pravin B Shelar Cc: Toshiaki Makita , netdev@vger.kernel.org, bpf@vger.kernel.org, William Tu , Stanislav Fomichev Subject: [RFC PATCH v2 bpf-next 14/15] i40e: prefetch xdp->data before running XDP prog Date: Fri, 18 Oct 2019 13:07:47 +0900 Message-Id: <20191018040748.30593-15-toshiaki.makita1@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191018040748.30593-1-toshiaki.makita1@gmail.com> References: <20191018040748.30593-1-toshiaki.makita1@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org XDP progs are likely to read/write xdp->data. This improves the performance of xdp_flow. Signed-off-by: Toshiaki Makita --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index e3f29dc..a85a4ae 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2207,6 +2207,7 @@ static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring, if (!xdp_prog) goto xdp_out; + prefetchw(xdp->data); prefetchw(xdp->data_hard_start); /* xdp_frame write */ act = bpf_prog_run_xdp(xdp_prog, xdp); -- 1.8.3.1