From patchwork Mon Oct 7 12:24:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Fijalkowski, Maciej" X-Patchwork-Id: 13824555 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B85FB1D1F63; Mon, 7 Oct 2024 12:25:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728303905; cv=none; b=bVNgPSa4yHFmxRcd90eDiHXgh/9vaOj5MtOwvaR+cFhWUIoXBsEd9/DYSVz4/VzMxhr2wT4+H3Izibq12Y7B3tXIaCJD1TE+xdSM8E1SAzDJ+qKoBVnnaSvIavDQ2tQYSS1795z01oNL0Gh1LlScTdu1c8YgdEX4EnX7kXFbqw8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728303905; c=relaxed/simple; bh=KM/R8kxq+tX9uW5KByhaNYSrISz1iNoMmr6A5Xg6M4g=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=etwxEhikPADyjsiMvPwfzY++YuwlW5jirBYtGT9+jfLtdTlgDVQvhxkI1E3pHOAy9AXOUiKlxj8xpwQqjexOYOGK14VEJp2iGWtdhwDA3fqMGz+EWHKf+WMbbPS3vYSKghfBis2Nm+J7QxiLVnBu8c2/7WJZKEv7F2NrJS/8++o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hIs5J/NA; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hIs5J/NA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728303903; x=1759839903; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=KM/R8kxq+tX9uW5KByhaNYSrISz1iNoMmr6A5Xg6M4g=; b=hIs5J/NANjEhdrAQnO6wUTxxnBwO7upyIgvD2zLRc6SZe/V9krcMrdiK rxEWNaeNxQQNHEKSFSFTdUxMdstfBLEpEIU8GqQ5+kVqM5p8sMf7y1dA5 7Du5iNelVl4nL5t28s6LEftlOhNCbjdwP0RuHQ1mrVUmGLDqUkE+gwDgF j/e7EHfi1YWHcTFyQ7ptkV8VxRBHzcEEeW6r6eWPbAokpoa8eIPZ2gqvE KtBUuVngf8X9F2d6fvmm1jS2LEmb23+SDuqYsfvxGoM1MghBz+IlP6hwk mJrr51ykJSPtY1PselHlwCAHJoSPFzvjYUaxdHAlC5M6NBGFetdmCmg+w A==; X-CSE-ConnectionGUID: DTEwBBVLQz2mdJHaI3951w== X-CSE-MsgGUID: ZEOHRnBuSZun10ZDNfrb6g== X-IronPort-AV: E=McAfee;i="6700,10204,11217"; a="15066323" X-IronPort-AV: E=Sophos;i="6.11,184,1725346800"; d="scan'208";a="15066323" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2024 05:25:03 -0700 X-CSE-ConnectionGUID: yGhsJb9+RnerBSXT+QdGgw== X-CSE-MsgGUID: CERSh+i9TMuL9nkKpugotQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,184,1725346800"; d="scan'208";a="80250810" Received: from boxer.igk.intel.com ([10.102.20.173]) by orviesa005.jf.intel.com with ESMTP; 07 Oct 2024 05:25:01 -0700 From: Maciej Fijalkowski To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: netdev@vger.kernel.org, magnus.karlsson@intel.com, bjorn@kernel.org, maciej.fijalkowski@intel.com, vadfed@meta.com Subject: [PATCH v2 bpf-next 0/6] xsk: struct diet and cleanups Date: Mon, 7 Oct 2024 14:24:52 +0200 Message-Id: <20241007122458.282590-1-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.38.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Hi all, this modest work brings back size of xdp_buff_xsk back to two cache lines which in turn improves performance. Interestingly I was able to observe on ice with HW rings sized to 512 around 12% better performance when running xdpsock in l2fwd scenario. First three patches are behind this. Other setups were not that impressive, I believe results may vary based on the underlying CPU. Bottom line is that shrinking this struct takes off a bit of work from CPU's shoulders. Other three patches are rather cleanups. Thanks, Maciej v1->v2: * fix build issues on patch 1 (Daniel, CI) * be smarter about xsk_buff_pool layout in patch 4 (Vadim) Maciej Fijalkowski (6): xsk: get rid of xdp_buff_xsk::xskb_list_node xsk: s/free_list_node/list_node xsk: get rid of xdp_buff_xsk::orig_addr xsk: carry a copy of xdp_zc_max_segs within xsk_buff_pool xsk: wrap duplicated code to function xsk: use xsk_buff_pool directly for cq functions include/net/xdp_sock_drv.h | 14 +++++----- include/net/xsk_buff_pool.h | 23 +++++++++------- net/xdp/xsk.c | 38 +++++++++++++------------- net/xdp/xsk_buff_pool.c | 54 ++++++++++++++++++++----------------- net/xdp/xsk_queue.h | 2 +- 5 files changed, 69 insertions(+), 62 deletions(-) Acked-by: Magnus Karlsson