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 5BE1DFD9E15 for ; Thu, 26 Feb 2026 21:35:12 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 82B1F402B2; Thu, 26 Feb 2026 22:35:11 +0100 (CET) Received: from mail-dl1-f54.google.com (mail-dl1-f54.google.com [74.125.82.54]) by mails.dpdk.org (Postfix) with ESMTP id D37B34026F for ; Thu, 26 Feb 2026 22:35:10 +0100 (CET) Received: by mail-dl1-f54.google.com with SMTP id a92af1059eb24-1270adc5121so1693588c88.0 for ; Thu, 26 Feb 2026 13:35:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1772141710; x=1772746510; 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=vDj2ZPC0i5hp45sMoqdLBpdndiywgw7wD93dw3V8Az0=; b=T7CFf7dbOCfV2kBLYfnjh63lOIKbgej1R91VxcNNYFnLRi7uM6LaME4bp66cnkjk7m sWLmDG7MYF2w7UFQ2XkG4Tmj+OeiCl3gFv5UyPel96poodjybCTEdkyeK/a3VYuBoGO5 XVAFM6Us0A6JC2sT4/O87jY+IKQnF8JGSjguM6Or3evc91GI6d6OGjOROmfOaghj6OgY KrqvNjRnXFQzYEi03Du+rmVyFRcEuE3yTJBafZVbxSSr0zfqY7N8vDVE9/vUSSVhkxxt L+bcPVVYyaUavefdF/BuQWKc/sfDcy+3RLBd9Tq2IHYnNB+KEcDzGcG+qMrXOd1Vs5R5 4Ftg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772141710; x=1772746510; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=vDj2ZPC0i5hp45sMoqdLBpdndiywgw7wD93dw3V8Az0=; b=A9Q4wnuc6VZVbgWiicZeB3NgWiZBA5SrXv3evjDU4Grgr3NF57DMN80WzIwTFMPLUV uT/YnsC/0sma8vwNiFh0JapxzhzYD8h/y5LuW6ne0opGVgUbaYjfVd51SHRoe5TP73JS 6iPg0V9NgRYtTIRhkZTGSZKE021aSoJsfzRtQ/4OGrdsXb+3F5JsR0gGQeYw2S0VndO1 nXuDnUfIeh/1x4zAMATXoCa+uzQ2G0qzgvEiO2ja3gFRlatWThprNL/sZcku81KcK0SS tPaDeXpa+OlT9InF/7Cv+zvAsitBYm2BeTS5LAqBfhJmnTagOyfCanhrZBVEHI28ijFz m/FA== X-Gm-Message-State: AOJu0YzR8A4F6Zr0fEutnG5YyGMl3AUPFYaKbTDnGN9nuGDwb84o/nPz gmqAyLht9Er5zKWx4ealTsj86l4nr3uXWQHawvYlnmuSbV1ho6c98EQSuloSYhmGxQs= X-Gm-Gg: ATEYQzxFRmD4h4AZa/CTFQ9M8dS0PsDJWu9WQYGsDSYzSAJf6aKMj0EgxU+pL6DGUui OSXkjyo9Y5nrpRDK4ojLOivjYdBLAbJ1SoX9ywi7C51gsz34GgYYzkDQp5ZMrFoDFstYXIGqyI2 ScnGCiGBMtiti7Aj/zP3CEYnQ+KnhBTPM27re0WtjPjz8pAUBIUejZULYtF7OpfiuB3uJxPfQcO 3l+fn+cntsIL+yvlcb8L00Y5gtjHA2fGMlNcyJbFpOK/UO0lP97zafh++4kaJsP2S195Qqr2z/o KgMk+pyz+cvbbsSMld2wN64X8+nk4cSvS6szBs5nNK5M1eMcq2FPpsSFJvJrvnOohs8elQ4zIUD pLro4xjVgFjIsYENXltL06hcSRQnwiWnQaBOe7nIgLUxmIZCYjm5FXZI/l1I9B28QBPnOCBTDfl 2La5XkEM9kJOWbRY947ZsvyG4dqopMJg2iIAZCSSuRz6SCU2X2xUrxe8/aQ8yia9ZyifzoDPcgn yg= X-Received: by 2002:a05:7022:4a1:b0:119:e56b:98b9 with SMTP id a92af1059eb24-1278fcf034emr186389c88.32.1772141709848; Thu, 26 Feb 2026 13:35:09 -0800 (PST) Received: from phoenix.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-127899eab46sm3018379c88.8.2026.02.26.13.35.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Feb 2026 13:35:09 -0800 (PST) Date: Thu, 26 Feb 2026 13:35:07 -0800 From: Stephen Hemminger To: Long Li Cc: dev@dpdk.org, aman.deep.singh@intel.com Subject: Re: [PATCH] app/testpmd: reduce txonly multi-flow src_port range Message-ID: <20260226133507.52427384@phoenix.local> In-Reply-To: <20260226191625.1049670-1-longli@microsoft.com> References: <20260226191625.1049670-1-longli@microsoft.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 Thu, 26 Feb 2026 11:16:25 -0800 Long Li wrote: > Reduce the UDP source port OR-mask from 0xC0 to 0xF0, lowering > unique high-byte values from 64 to 16 (16 unique ports per lcore). > > Modern SmartNICs rarely need more than 16 queues to saturate RX, > and excessive unique ports can exhaust hardware flow caching, > degrading performance. > > Unique source ports by lcore count: > 1: 16, 2: 32, 4: 64, 8: 128, 16: 256 > > Signed-off-by: Long Li > --- Make sense to make this less spread out. I wonder if this should be a parameter to allow for testing different spreads?