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 559E846BE8; Tue, 22 Jul 2025 16:08:20 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 3D42640668; Tue, 22 Jul 2025 16:08:20 +0200 (CEST) Received: from mail-qt1-f175.google.com (mail-qt1-f175.google.com [209.85.160.175]) by mails.dpdk.org (Postfix) with ESMTP id E18D340668 for ; Tue, 22 Jul 2025 16:08:18 +0200 (CEST) Received: by mail-qt1-f175.google.com with SMTP id d75a77b69052e-4ab9ba884c6so69237151cf.0 for ; Tue, 22 Jul 2025 07:08:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1753193298; x=1753798098; 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=+LTIByl0UjqQH/xIqvh8xz7gayCe6GP/2DHCpWnd1L4=; b=rwdHlNpOLNuaFKKC7E8D0dnqZPLp8+hcK0jA8eHE1u8BQXeM/7X0ZIOL80hvfayELM MaIN+snBRp4qhOlIzsrYsfaF5DUxEyF4iq43NEK/JNOdd2JoaTGV4wTo9QmQt+H1rucC yHSc8v/5I+Ct4nWsW6/H6qnK7rJpw8mXX4euCNpfCSygS7Q7jq77/YQTfMdYV3rt8c0x zA4rWwbxozrtFV5ExrHYbfvyY7883jPiwb7XaODUJD3pexXGZJ+s4ZNKxhYkETU6fvOe OyGjb6/ongIFSq2hevnMZMab+R5YwSIdjfAEmVSQvFlA+frtMlfXXC1xMM4itg3i0dcw Z3TA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753193298; x=1753798098; 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=+LTIByl0UjqQH/xIqvh8xz7gayCe6GP/2DHCpWnd1L4=; b=bu1x4U0x/RMs1EozxtTh6fn4oy/9NsGKskyqPSVlE8fp2gndl8pGl9IwIuIXAki5H/ gwZhgmowIDCiuicy062kH+o4MFTFRdWGmH90PfUXGVBHSTtVx5LEcrgWbdSCzLvExQbe WOwFhPuamQLp5G6pB2fCruFZot5FFgi6He0SNie1mQRAxUF1a7vVUqonvmYO/yLbGvcG mXn4J9hXTisyjGhfcHd8fYSqHde4A4WAxnyQG6Byc0yTgql/H+acBEQJJmLEs2j+6OwJ LadNYvqYX1h8UeExFeIDWNmLUsbzjgtuMfhM9XPxCSxP4ok0jsztRd0lHNx+woIL1tKK yTvg== X-Gm-Message-State: AOJu0YyHJXJmtZpi6Gr/Kgx1eEA4s1G5XSTfbEIPiS38zMIEkhtD/LzL mYLP/CXBy4uHzuE5vjaoXYbhxNnhCLN3JV3+YW/YTeqSrRHiEyOfGSfqoTa5j6T9Fwg= X-Gm-Gg: ASbGncuQVCiGAPQVentF4fS9SmerCR41uU9KVCCQKoytGwOeIB6u2pOpbKmuvUKuUky k6RHAO2RXawhyMqkcJ8l/tZlhzX17HBKLJEJ8XvNSVGdOmqZ/H/ZAl8mNtn5haOh2C4PLa4kivD x6ulgcyndQYRUIm2EifIwRyLTxowZ6kCESj6c/k5A55SXlRAL3+J+NJKLJsYZoN8vvZomE3LfcO bLq5/N0qTphQ7iyXDEj8dlUuKJ4xVIqD2dAuq5lD+2pf+GYXrYKMfjAhwZl5677+x2pp4TQUFGX /pTWzpTy7mhRS4bTMiydu+vb9NjAtWCT/Ob2Afw0Z459NRTUG486hRg6I0BSNwfr6+KAGEbIJ/+ JF3ZRlwIDReuechsyE7Qkb2LVG0vpd1zck702D0pvPC75pUMDHAiOAWeZMvBwIa5fq+og5LYZXp ZbE4NCUX9fzA== X-Google-Smtp-Source: AGHT+IFIUmoCc88gpHJDzpqmUE5Ke25yRc8ToTUjawiJjT9bgWmzdwomE0O8lj0GAhDqLYetDsYcog== X-Received: by 2002:a05:622a:20a:b0:4ab:40d6:ba26 with SMTP id d75a77b69052e-4ae5c3e4cc1mr39658011cf.24.1753193298150; Tue, 22 Jul 2025 07:08:18 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4abb4aebcf8sm54625291cf.40.2025.07.22.07.08.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Jul 2025 07:08:17 -0700 (PDT) Date: Tue, 22 Jul 2025 07:08:15 -0700 From: Stephen Hemminger To: Bruce Richardson Cc: dev@dpdk.org Subject: Re: [PATCH] app/testpmd: add flag to enable RSS for single-queue Message-ID: <20250722070815.620df80d@hermes.local> In-Reply-To: <20250715125330.2127309-1-bruce.richardson@intel.com> References: <20250715125330.2127309-1-bruce.richardson@intel.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 Tue, 15 Jul 2025 12:53:30 +0000 Bruce Richardson wrote: > For testing purposes it can be desirable to enable RSS even when only a > single queue per port is in use. Add an "enable-rss" flag to testpmd to > match the existing "disable-rss" flag. > > Signed-off-by: Bruce Richardson > --- Not sure about this. It makes no sense to have RSS enabled with single queue. Maybe you want the hash but no steering? But the DPDK RSS flag doesn't require driver to produce HASH. I would even argue that ethdev layer should warn application trying to do single queue and RSS.