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 Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5A60C9EC7A for ; Mon, 12 Jan 2026 12:04:17 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 1C3D740C35; Mon, 12 Jan 2026 13:04:17 +0100 (CET) Received: from mail-qk1-f181.google.com (mail-qk1-f181.google.com [209.85.222.181]) by mails.dpdk.org (Postfix) with ESMTP id A84C340A6C for ; Mon, 12 Jan 2026 13:04:15 +0100 (CET) Received: by mail-qk1-f181.google.com with SMTP id af79cd13be357-8c305b7c472so429428885a.0 for ; Mon, 12 Jan 2026 04:04:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768219455; x=1768824255; darn=dpdk.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Uxwc7CTHh4Z+aO2QRVelIxhf6n5kgjqMfrzzJi37RKg=; b=IYjsdNsjxKuVqgEI++GMqzsxV1wiyUAU18SoRY2Rdjk3EY1J8m4uUDSiyHtPPoIn4r mI1TSKCsGkg25iCXG75ZkN/YlCaRMezARMW4ISSTHkoAN1HuCm8y0Vts8B6W6huSllw+ PpxYJE3u3kV79cPJeiXpAd3PnW+W/5AYrpiGTG56tFoTrgM3JvQstO6mxnYseCPI+Ag8 AOZmEBdtRGQdZbcmg6igj0CaD+Ee9K7oEfikypHgOpLKi/htnouW/LzWKBbMRsdg1+OR 6RDprkJEre8srxsSlvolUNebXn8+wNLo8FcC9vc5AmEu8wr0hEsv45kDsaeV1q9SjMAR /lxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768219455; x=1768824255; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Uxwc7CTHh4Z+aO2QRVelIxhf6n5kgjqMfrzzJi37RKg=; b=TAPglFXntyAjLuotfaGI6M8mCIBB6oAXYUls3SRJPSba1cA9RYo7Ym6l+IV0PIF78B wM9srdMc9eYj0wRVh7T41ynib7wZgXy1D5CI9Y/b+aTt8gvsylrJSnAExIMrEXUPhhcO wJ0t3cMstpJSrcGwbTEPam+Ry2+3SPnzO4fSpW6+9PYiVPckYADmKGWAslAOrr6I4D+f K3bGYtIOuevGQ0d/g4vVMjeJlgo1U8n0569nDF13AwcuI5/gHX40HoCQctgN9etllkCb eFv+iy/98lX88bY5YqElQ30H3Q4hJUenyfMyeqTWXj5PrGRJYUyUGXhs1+n5fin7trE4 YNOw== X-Gm-Message-State: AOJu0YzqBIXLifzAMCitCGcJtA5iQBCbMDDDfy3Qo97zlmW8YcJmq+j2 rIBweCZKLiuxubMHkOTkRWbRoesApccJlNBiK2kkMSS6rTNmOkiuo6W7yqMtzA== X-Gm-Gg: AY/fxX7NtsZKgLB6dfw1FZmJ+bzZqVVbZ/NO+1KidtErCpljr1M3PlKGEz3irZwfZiA 3pnTe9tO2ssqHyoTOg8eljfp+IUsS4/r+3Vo9QlgMiv5VdXVlRoC5+9PD171Y1ZiGzeIOG9cvuK G6NZ5JAOl5+P4Sg4v8hUleTvUEjfwaEgd6ojpCTcjXi3OmSHlC+Qrl1uSFsBt6bgF3ZMEcnYqtK wXQFiqAUPDTBaZrhJeKtOl43GZgVJhna8Av3LITAtAgCXMz1tj/K5OcCy2NHPiarpOrQVz2p8jQ t++D2eipLceuG7LqChSAmAWdBMUss7euOz2TdVHvAiWLbP6qdFnDRkQpfm3hxjHnlMbQqf9cy+E YgaIaV7b7MBNDL3IlMN4H3sur37broYaSqeMV07BwoieM49IewNKuAabKmrZ0JvkWF9GPRbNKSQ sgjlz2196ERfQHE0CpcdATh8X1FGzA91y4YXDT3Fzl/Q== X-Google-Smtp-Source: AGHT+IFvt4Yb9SKq22t9OYFOAr+T95kcVjST/4FvStakHL2g6flK9v5zk+Xz1S73XP4A3p6nNlQyTQ== X-Received: by 2002:a05:620a:7087:b0:8c0:cdbd:e09c with SMTP id af79cd13be357-8c3893cd9dbmr2324559285a.45.1768219454695; Mon, 12 Jan 2026 04:04:14 -0800 (PST) Received: from st47p01nt-relayp04.apple.com ([2620:149:13c1:500::12]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8c37f5433c6sm1547713885a.52.2026.01.12.04.04.14 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 12 Jan 2026 04:04:14 -0800 (PST) From: scott.k.mitch1@gmail.com To: dev@dpdk.org Cc: mb@smartsharesystems.com, stephen@networkplumber.org, Scott Mitchell Subject: [PATCH v14 0/2] net: optimize __rte_raw_cksum Date: Mon, 12 Jan 2026 07:04:09 -0500 Message-Id: <20260112120411.27314-1-scott.k.mitch1@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) 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 From: Scott Mitchell This series optimizes __rte_raw_cksum by replacing memcpy with direct pointer access, enabling compiler vectorization on both GCC and Clang. Patch 1 adds __rte_may_alias to unaligned typedefs to prevent a GCC strict-aliasing bug where struct initialization is incorrectly elided. Patch 2 uses the improved unaligned_uint16_t type in __rte_raw_cksum to enable compiler optimizations while maintaining correctness across all architectures (including strict-alignment platforms). Performance results show significant improvements (40% for small buffers, up to 8x for larger buffers) on Intel Xeon with Clang 18.1. Changes in v14: - Split into two patches: EAL typedef fix and checksum optimization - Use unaligned_uint16_t directly instead of wrapper struct - Added __rte_may_alias to unaligned typedefs to prevent GCC bug Scott Mitchell (2): eal: add __rte_may_alias to unaligned typedefs net: __rte_raw_cksum pointers enable compiler optimizations app/test/meson.build | 1 + app/test/test_cksum_fuzz.c | 240 +++++++++++++++++++++++++++++++++++ app/test/test_cksum_perf.c | 2 +- lib/eal/include/rte_common.h | 34 ++--- lib/net/rte_cksum.h | 14 +- 5 files changed, 266 insertions(+), 25 deletions(-) create mode 100644 app/test/test_cksum_fuzz.c -- 2.39.5 (Apple Git-154)