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 D4840A034F for ; Tue, 22 Feb 2022 02:49:08 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5A0F440DF4; Tue, 22 Feb 2022 02:49:08 +0100 (CET) Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) by mails.dpdk.org (Postfix) with ESMTP id BC2B64068C for ; Tue, 22 Feb 2022 02:49:06 +0100 (CET) Received: by mail-pg1-f177.google.com with SMTP id 27so10510695pgk.10 for ; Mon, 21 Feb 2022 17:49:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AV+29Y1CzvljfKWwgiNpJHG76alQwJzr9L8YuccMFxw=; b=SJ5mVrpjnfm8NCrDlsmDgkRL9cIF9OdMtBjNSl85RaxnMS1RR/JMw06taGpDEhEk1a RynJoTaWVIcpncbIuNjflJOH1cFQCEUqzzENmMKbM8W70oJZgPWl3+ig3NAwB/cBJrma UBM5NJ4gl5zsIFYhHIoS/5HD1VS1DTOQc2l3Oj2HZlalsdxig6zdf+K8EneJMKgqgOQJ HFYdiGhDrZHonmzpUbTDjhERN09CvNlsKv85nXzyAfqkPrwhvzsvKTKvnOfAuRBUZn3k jc6y0O36VbWtlJVQ9+bSSIBmfeK4jQ1Ssm6oTjr4YBTudUTc2VjEf+ZYw5M5MZFnx4p6 JFjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=AV+29Y1CzvljfKWwgiNpJHG76alQwJzr9L8YuccMFxw=; b=2nQerkKoRAe2CHdLPVRuo7DXjwaq91cFo1xf5MLXdCOkpAV6Bc4W64UznDs9/3MOUf 6bfpCamdCN00/oKDPmreq+NO1MzEobsWm52EjKmIJSd4VYWEyhPEM0Bvj50TbzEqXA5A NWNX2hC/NFIQKU9BQHKkQSXDPH4v4rHkpAy/jH3eVQMi9PzTBH+TLXd9aQP1pKKcI4FG TQ6uRB92BdYGS7xBVGDPT58uxoIWweUiEmMA9u9pJWfUXGUMWN0wbDMaC0CEIvKXw3UJ pETIJcKxccy2KuypjjHUIekHRiDOdH4wlj7PiGIe/gjkavicX15njBcI+J8kxdLp382l nIIQ== X-Gm-Message-State: AOAM531iXrdVAiIw4KuncXaowOAs+f9w3SKCM61PcK3f0q2kO5qMO6z3 3T2R7OMPoHDKrS6vO/zhnZiPVg== X-Google-Smtp-Source: ABdhPJx5ChoR4T3GAk8NTk4q9UbNodt9y7RfRQ/XpO5C5ZANom9gKcbhfU7oDrDQ3fzWtD3A8Ihf8g== X-Received: by 2002:a63:4a22:0:b0:372:9a9f:d4ac with SMTP id x34-20020a634a22000000b003729a9fd4acmr18138640pga.331.1645494545716; Mon, 21 Feb 2022 17:49:05 -0800 (PST) Received: from hermes.local (204-195-112-199.wavecable.com. [204.195.112.199]) by smtp.gmail.com with ESMTPSA id d13sm13944352pfj.205.2022.02.21.17.49.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Feb 2022 17:49:05 -0800 (PST) Date: Mon, 21 Feb 2022 17:49:02 -0800 From: Stephen Hemminger To: Staffan Wiklund Cc: users Subject: Re: Are Intel CPUs better than AMD CPUs for DPDK applications? Message-ID: <20220221174902.115c1eed@hermes.local> In-Reply-To: References: <20220221090852.05f7819e@hermes.local> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Mon, 21 Feb 2022 21:28:08 +0100 Staffan Wiklund wrote: > Stephen, thanks for your answer. > I realize the statement is very vague. > I was thinking of if there was something common in the design of Intel and > AMD CPUs respectively that has an impact on their use by DPDK applications. > Do you know if there is such a common design difference between Intel and > AMD CPUs or is it just a matter of using an Intel or AMD CPU with the > requested performance? > > Regards > Staffan I am not a CPU expert. But compare memory bandwidth, clock rate, PCI Express version and support for AVX support (for some features). There a few places in DPDK that can use AVX512 but it is limited https://doc.dpdk.org/guides/howto/avx512.html Also there is a tradeoff with more cores, NUMA, etc as well as cost. Don't believe simple tribal knowledge, you need to look under the covers.