From patchwork Fri May 13 15:02:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Long X-Patchwork-Id: 12848969 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65D12C433EF for ; Fri, 13 May 2022 15:03:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381703AbiEMPDI (ORCPT ); Fri, 13 May 2022 11:03:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381823AbiEMPCx (ORCPT ); Fri, 13 May 2022 11:02:53 -0400 Received: from mail-qt1-x832.google.com (mail-qt1-x832.google.com [IPv6:2607:f8b0:4864:20::832]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 818D54DF73 for ; Fri, 13 May 2022 08:02:38 -0700 (PDT) Received: by mail-qt1-x832.google.com with SMTP id h3so7024037qtn.4 for ; Fri, 13 May 2022 08:02:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=8o2AIqylfLZkog3xkyjBPBeF8N+IzHoGrC+frJH1aPY=; b=J3P2ravViG3MxBAvV+R+gEvIjCvzkGjAOAyhkUSsqSQGCxPyWmJLN8fhwHkGhjFi4v e8onmX7tSTRs+6ferLVSCzoC8hJso+SkpxQB6P1c64/OuAeW++NHblGRq1Llh/zt3dSj O24Z3ScZwACs/29AIqkb5LjSQNAk5CZhFsOcCTArEbgjlI1kpjDpy8FGppywBURhINbj zd18/x/IfDztrWtsWDm5JLVqWIRhZkBeFfe/HibYzjShTYIdDeE8d8IumKr57jcZRtF8 a/H6ORs66fyNRCCNn5JVIPBVZR8Ho4B2aOsGRGq/EdLSUtRLMMzoQl3FqI9DcfqnwMEn PrUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=8o2AIqylfLZkog3xkyjBPBeF8N+IzHoGrC+frJH1aPY=; b=Hdv67kYfJkVmeYpeP45xXsjOrah1ySFPwUlIl/6YrQoLzg7ra1IvkemHU67Nw1CXMl 04DYnUlHQynl3C4EhifcOMbxN7WPbNQEku0m0tqc2GB4ibqLlOUkhk4RS/bzUhqZ9Yaq /GTxQn/bBP4IQmdpxwQKC+Ka22nS15LUPZZg8uNOZF+/pUG0ifokevYIfRyZRV7vUbCd YyySYWKbfysEnuMXz+gQ1uMwJKdUGmrL1wspRf+1v+bsSuOSvL0oHQ+l1DjVZy0nyYnf eHVO2RjsboDE9+5HN87wIFRa4Kag9WC67lxd3Z3V8yubJE00w7K8YPuJ2yQjPOyDS4C0 gn7A== X-Gm-Message-State: AOAM5325N7D53tqW3bHDG9z7fd/odPjT+su/aDHT0odoFAe3Tl2vwUjn 1268vkIDPy3y+fKy56magMrwJ+dv5HY= X-Google-Smtp-Source: ABdhPJzYyZAqyq7sM72rlSQSeXgY21DYgt/vchKV0vOVUrCSk5+wmDcSRcRfJAGeWCK32tACLG9jfg== X-Received: by 2002:ac8:5fd3:0:b0:2f3:c522:1369 with SMTP id k19-20020ac85fd3000000b002f3c5221369mr4814443qta.225.1652454157038; Fri, 13 May 2022 08:02:37 -0700 (PDT) Received: from wsfd-netdev15.ntdv.lab.eng.bos.redhat.com (nat-pool-bos-t.redhat.com. [66.187.233.206]) by smtp.gmail.com with ESMTPSA id bs41-20020a05620a472900b0069fe1fc72e7sm1514984qkb.90.2022.05.13.08.02.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 08:02:36 -0700 (PDT) From: Xin Long To: network dev Cc: davem@davemloft.net, kuba@kernel.org, Edward Cree Subject: [PATCHv2 net] Documentation: add description for net.core.gro_normal_batch Date: Fri, 13 May 2022 11:02:35 -0400 Message-Id: <21572bb1e0cc55596965148b8fdf31120606480f.1652454155.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Describe it in admin-guide/sysctl/net.rst like other Network core options. Users need to know gro_normal_batch for performance tuning. v1->v2: - Improved the description according to the suggestion from Edward and Jakub. Fixes: 323ebb61e32b ("net: use listified RX for handling GRO_NORMAL skbs") Reported-by: Prijesh Patel Signed-off-by: Xin Long --- Documentation/admin-guide/sysctl/net.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/admin-guide/sysctl/net.rst b/Documentation/admin-guide/sysctl/net.rst index f86b5e1623c6..5cb99403bf03 100644 --- a/Documentation/admin-guide/sysctl/net.rst +++ b/Documentation/admin-guide/sysctl/net.rst @@ -374,6 +374,17 @@ option is set to SOCK_TXREHASH_DEFAULT (i. e. not overridden by setsockopt). If set to 1 (default), hash rethink is performed on listening socket. If set to 0, hash rethink is not performed. +gro_normal_batch +---------------- + +Maximum number of the segments to batch up for GRO list-RX. When a packet exits +GRO, either as a coalesced superframe or as an original packet which GRO has +decided not to coalesce, it is placed on a per-NAPI list. This list is then +passed to the stack when the segments in this list count towards the +gro_normal_batch limit. + +Default : 8 + 2. /proc/sys/net/unix - Parameters for Unix domain sockets ----------------------------------------------------------