From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1AF8646204; Wed, 12 Feb 2025 16:37:48 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 0AC8C42707; Wed, 12 Feb 2025 16:37:48 +0100 (CET) Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) by mails.dpdk.org (Postfix) with ESMTP id 806EA40658 for ; Wed, 12 Feb 2025 16:37:46 +0100 (CET) Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-21f4af4f9ddso84287955ad.1 for ; Wed, 12 Feb 2025 07:37:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1739374666; x=1739979466; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=OQ79Y5YbaoKNl02BcGVT1+MzDGuQXNZNmaOqKjbfs9M=; b=ZWkeSYpEOjXGFFqfq2r2LZmbyrN7ZYikPM4o2nJ2MZTbkfgMdwx0JT9gH77wpmBF1+ q8wG9+WadDuVEBH2EL83pUkETWMpPmRsDSJoviI6l1eCFyuPo3t+CC0KXv5bMMPej6az c0wXxDHWHVdKD9+8bB978kH0blXoWwd1VLjAMtmLfqd4dOJ72MQJwlP1b4YSLMXyMqHi lur4HqxwbtBN6eUeAmyaC4wbIX1POA0eK3TJ/JBKoHDvSvzWDjfMYe3GFxCZBkYCExrr R7H3hfQt/RfYc/F+PTCuEoeFCxl95UIeW5J//Zvhj8KRGr4EsK5fBSWH64DJcIRs/kqp hQ5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739374666; x=1739979466; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=OQ79Y5YbaoKNl02BcGVT1+MzDGuQXNZNmaOqKjbfs9M=; b=uixLUKfW/a6e2sIrvf2rCGG9pQSKkmYzcy92ccvevWYwbCOm7ozFq+j9Bil9BiheCc QPtXdnDk6zU/UqtLnQ5fAxMZSziWQiNBiGjwfxoBP44zNoXFXG2p1BshGNAm48Gb/+PJ ywURkHjS9dj8oi5n7GvcMqGY3SHTBIIM4KHfcOjCCK+Oq/3ewx2tdgil7WR8lnXKrfma QQ14DFKP1Di1hOt3kGhhti75pzjeJhj0bNHxN9gsODGH3C6I+BVXx2780pl3Pdp8uy+F cBA4tU87r5HaK5GaEO5xdKvK5SXb/gMcvE61Abt3UAY3hElvNLIvv3l5pWT+uBCpzVJF FWWg== X-Forwarded-Encrypted: i=1; AJvYcCXnqkzi65hwl3+wJydGdApHRW7piUE/aK6T3g9P+EXpi4Wc3FgAMKjPzN2xWKWEwk4NPv4=@dpdk.org X-Gm-Message-State: AOJu0YxM5OlueWnjhYnPwmVX82LZ0xHjBnNu8KqHhMwP5UGqvr8zlgAr F0ko2upKQ5xbSeUYZxuFcrBA092DG3sEaZQBmy20PhR4y1rlnGYU2mz0iucg1vE= X-Gm-Gg: ASbGncsQJF3+vXygK48R/GJNiK3pNkx4wcUjv58ejpbCNHuzniCCOwkwUcqC633OFfF SA/IOS2+ampfK2yboCOEQsH1D7XiS4bdOlNVx/Xmxg5gDp9Nm2sYnpGqW+IzPOPxzPsFs54/NH9 5gRJ1gei6xiQ2VUyHpeEt/8eR9rFEeTueQ7jU2014XeoGkq3wW4ccCCFvadPK9Nw0+mOQGgS9cb WKnTWdWr+kJ68A+GfkHwIFv+f2CBfh7WSNAv754EKKWvXFW34ueaX8GP83xdB5LJpyopaRAOhf5 Dwt/kB4hrvdfegLAM3oH5mu/9WvYLtxzvf3r/iO0nrUPMPdCl+VXInJhK794D++BkWw1 X-Google-Smtp-Source: AGHT+IEpVZVLsoIsM/aejU5vYCHjAg1ln/gSog/OcKPeXWaMFCUafvAzdF61ylclYKSuSztpLLS5YA== X-Received: by 2002:a17:902:dac1:b0:216:1543:1962 with SMTP id d9443c01a7336-220bbb45e0amr53312645ad.23.1739374665699; Wed, 12 Feb 2025 07:37:45 -0800 (PST) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ad53aa4678bsm6747794a12.28.2025.02.12.07.37.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Feb 2025 07:37:45 -0800 (PST) Date: Wed, 12 Feb 2025 07:37:43 -0800 From: Stephen Hemminger To: "11" Cc: , , , , Subject: Re: [PATCH v9 12/28] net/rnp: add support link update operations Message-ID: <20250212073743.7fdd6d53@hermes.local> In-Reply-To: <89E4C0CDD2F99463+001a01db7cfd$4210f7e0$c632e7a0$@mucse.com> References: <1739263818-59770-1-git-send-email-caowenbo@mucse.com> <1739263818-59770-13-git-send-email-caowenbo@mucse.com> <20250211073503.78f084ff@hermes.local> <89E4C0CDD2F99463+001a01db7cfd$4210f7e0$c632e7a0$@mucse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 On Wed, 12 Feb 2025 11:21:49 +0800 "11" wrote: > Hi Stephen, > For memcpy what ever base code or other code all used memcpy not rte_memcpy > ? > Even the memory is malloc from rte_malloc/zmalloc ? > > Regards Wenbo. The documentation doesn't make it clear but rte_memcpy is the same as memcpy. It only exists because for some cases (like older versions of Gcc and differences in alignment assumptions) when running micro benchmarks rte_memcpy was faster. All new code should only use memcpy() unless there is a benchmark test that shows a noticable difference. The reason is that tools like Coverity, Gcc, Clang, and PVS studio all treat memcpy specially and can do checks for access outside of range.