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 2B4FF46B0A for ; Sat, 5 Jul 2025 21:02:09 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id AC1734028B; Sat, 5 Jul 2025 21:02:08 +0200 (CEST) Received: from mail-qt1-f171.google.com (mail-qt1-f171.google.com [209.85.160.171]) by mails.dpdk.org (Postfix) with ESMTP id 730BA4025F for ; Sat, 5 Jul 2025 21:02:07 +0200 (CEST) Received: by mail-qt1-f171.google.com with SMTP id d75a77b69052e-4a7f61ea32aso40775361cf.3 for ; Sat, 05 Jul 2025 12:02:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1751742126; x=1752346926; 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=/sSfc1j5l1zhogrQASP0HpFAY4Cyfzcp29oBfZVWl4A=; b=E8RdWAUulFsunsPHE0QMa7lZGxOJZk3jc4+cch11OUAfGcAvRXYbFgIBfA7sOV2aOd 6HMZY3C0ES+56oFy69ZofHUg7Ys47rIhWGBoF3yQewp0fLnWaBP3fll6VvQBJd/cfM3F VeV4EH+i3JUl04gXduVctVZpCvNIwT3Cz++QM+Efib4B81oVgcUb+e02TKcumOBII3w3 t+TlWdQyQ6bGj6ppVValcBqA04sPJZvAeI/EVynC+na7SwfnpsBGeeqi5CPR6YUhI+9z QSMHZqS8O30uM7RkmPRf0KASi2KeERbao+5d3kMpNiq03cNdnQU58Fx4I+7/7Rz/f6R9 LxCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751742126; x=1752346926; 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=/sSfc1j5l1zhogrQASP0HpFAY4Cyfzcp29oBfZVWl4A=; b=lb02KW5Bcus0AK6b3HB22CuE2KT+rBKmNWKAgiXBmUQFQ6NYeFxkuZ6jcbSAnRfij4 +48eRq0qyAcKGwu+FG17d0VdAirgabMPnQipjRsNBO2fX3Ny/jHEluc0d7cVKyto3ssh NdHe1sNNlfkp3zzyWsKItxxdkRgxX3MuTZvWPB3G8puN/bcvaeBfpV3flqb7wPOvAw/D uRX/USWZsNOVb6xyUkHiInLioO23IXt8u5m/gwgySWCV219l9208xETVz6NHCzRLESfj PSfeNaSXh5cnAliPJvyFxorbgQhdvPah93FpWBtnSesHElHVm9/YFGiIuvMNwZmZrvuE dGWQ== X-Forwarded-Encrypted: i=1; AJvYcCVt1sWsIRaY3bcKgkruT5wx7Ids70wheC2C4TojGQmfTO4GejHWynRi+pUCVGC3AIscsH0r4w==@dpdk.org X-Gm-Message-State: AOJu0YxPxur8L9bKVQUIHxSJ9z/WojTH47o4+McB8C7XB4/pQ4blDkPt 0nhSMfF/AiMPS7fdz7gn94k6Ls/Yw2DwmZOjaKTB1BhjkcFchf6DViaoLsFyg3Vnu8w= X-Gm-Gg: ASbGncutryI1BMaziFL15GosLjcaVkjLVpoHbHJK8E++DSxG/+nF0emgTYQC9cRBj+2 +UjLe4z6lsWd12HaIULrvs8Sdmkt78zLvABrzc68SO576HjED7BvlWCUW1rOXFiR7Yeleph7kte cXgKcY044Dgyy2oCrTkmjhYYjRyVscSCJ8GjYNdXYSe7kAJLYpXGA4lnB2AU+FaX367UvX8B1Sl oMAH1v9J77ftVqd8EaYn50lz4aRRx0/dGEXQA/6ep66bX09xXNPE7Vxzxhhh524SuWmM+wcrR4U l2CWf/WSIIgZXQaqI3BzewzVLiZqPQC71eRw9RaZN41z4EfAtFhFZE5dDNF9bZRr7+00nCMJk1u OgOiiSBa5rp48z6dPvbcviAf6ieJbgsINBxyVe03apBLrcqK9NA== X-Google-Smtp-Source: AGHT+IFod2yvqe0d2A078m6vOboB4CwMDBujHZNVUly+TmbLbe8grStSmDGhg8A2y0CXbSa9vFhcTw== X-Received: by 2002:a05:622a:1929:b0:4a9:a596:1c06 with SMTP id d75a77b69052e-4a9a68f9068mr55283901cf.16.1751742126470; Sat, 05 Jul 2025 12:02:06 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4a9949f99d1sm35993021cf.24.2025.07.05.12.02.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Jul 2025 12:02:06 -0700 (PDT) Date: Sat, 5 Jul 2025 12:02:03 -0700 From: Stephen Hemminger To: "Lombardo, Ed" Cc: Ivan Malov , users Subject: Re: dpdk Tx falling short Message-ID: <20250705120203.1d0c230c@hermes.local> In-Reply-To: References: <20250704074957.5848175a@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 Sat, 5 Jul 2025 17:36:08 +0000 "Lombardo, Ed" wrote: > Hi Stephen, > I saw your response to more mempools and cache behavior. > > I have a goal to support 2x100G next, and if I can't get 10G with DPDK then something is seriously wrong. > > Should I build the dpdk static libraries with LTO? > > Thanks, > Ed > > -----Original Message----- > From: Stephen Hemminger > Sent: Friday, July 4, 2025 10:50 AM > To: Ivan Malov > Cc: Lombardo, Ed ; users > Subject: Re: dpdk Tx falling short > > External Email: This message originated outside of NETSCOUT. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On Fri, 4 Jul 2025 15:44:50 +0400 (+04) > Ivan Malov wrote: > > > Hi Ed, > > > > You say there is only one mempool. Why? > > Have you tried using dedicated mempools, one per each port pair (0,2), (3,4)? > > > > Thank you. > > > > On Thu, 3 Jul 2025, Lombardo, Ed wrote: > > More mempools can make cache behavior worse not better. Your best bet is to use tools like perf to profile cache misses.