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 B6836A034F for ; Mon, 22 Mar 2021 13:54:59 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 424FD40040; Mon, 22 Mar 2021 13:54:59 +0100 (CET) Received: from mail-yb1-f175.google.com (mail-yb1-f175.google.com [209.85.219.175]) by mails.dpdk.org (Postfix) with ESMTP id A21F040041 for ; Sun, 21 Mar 2021 07:47:46 +0100 (CET) Received: by mail-yb1-f175.google.com with SMTP id w8so2966347ybt.3 for ; Sat, 20 Mar 2021 23:47:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=S4C7uae22gvku2E1yNjxwgSRGusmQj858idoTR8r6vU=; b=QdgXKNngoJTl+gUJCg3a/Ct2wDtBE/az3woQq+bvhZXMNGfmBcUIE4v3zzO8goNBos hjfk0HLSm2bgwTVYJGBcb0cWG16N1oUGFg+1opmo61ctvFS5R1pzCJsG0iBtx5Ihs1Mm vddt/vw7/HuEXjCMGF1QMFNPe6O+zMNUKSQ5LYlD0YN7zFJc1hnU7BbjXXc37P9xirqa 3kcG+zPE+FbGfrnNctZg+WdsaH0eOjC8/SsbS++8G80f5Zi54Jc4kcR54eqcWWQMrhb+ reTBSzTsRaMeB01McMYh/lakfKiwLwQwuE5AeDMPOo6KBT5KDQR7Uh4QSE4ERbz5Zi8a fSjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=S4C7uae22gvku2E1yNjxwgSRGusmQj858idoTR8r6vU=; b=CyPlNZIayUoH3nk3XcV+KqD9S2hSILejRj63GbZ4JelnpVXpoJrzAZnAzXLm0uIQa0 cbCzRHM7r/JpK9xxdYR75ok9khWekE6KZGE4Le+9ta5287N3wKJLLmewzrP311v89ZiW YNfKDBh0+0YBeUj9PymtCe+rAlP4cSJQZm6YKfNLrwB85PaMy2XqbwFmEpvIeT6IeuPN zIrneylPsjR0v+6gLFBdYzEVB7CJ3WHurWbR5npbnzwfcArwUdse9ssNP502ru4FsDgQ /nPxbAYcWfRRgsLjo9xL81uJvt7b4D6nYMeo4c/lJElPkImhh+ofYOJ/znAUmAXgA4Tl r/Ww== X-Gm-Message-State: AOAM533hh6CueCD9pKbIhRijnZ3pIo6jxsYZj9LDI7TcxbayLxCdHomg 888WC/w3wX+b4i9BOGzhLUe4S82RqUc3COR5Z2LbykyUqGU= X-Google-Smtp-Source: ABdhPJwqLigPQ/OmSql5SvNo6qRYDbqLJdYmng2NYrg9bwlIUDiz0aB903JsK2pf0rZyYpI9c+8EqrZWSxOqo+zmPu4= X-Received: by 2002:a25:aae1:: with SMTP id t88mr16253448ybi.112.1616309265645; Sat, 20 Mar 2021 23:47:45 -0700 (PDT) MIME-Version: 1.0 From: Rajesh R Date: Sun, 21 Mar 2021 12:17:51 +0530 Message-ID: To: users@dpdk.org X-Mailman-Approved-At: Mon, 22 Mar 2021 13:54:56 +0100 Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: [dpdk-users] DPDKthe packet capture performance increases steeply between 11 Rx queues and 12 Rx queues. Any idea why? 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 Sender: "users" Hi, We are experimenting with testpmd packet generation and capture at 100 Gbps on two machines back to back. We are observing a peculiar behaviour that the packet capture performance increases steeply between 11 Rx queues and 12 Rx queues. Any idea why? The details of the setup are given below: DPDK version: *19.11* NIC: *Mellanox ConnectX-5 100 GbE * OS: *RHEL 8.2(kernel *4.18.0-193) Application: *Testpmd(txonly on generation side and rxonly on capture side)* *It is observed that *capture rate increases almost gradually upto* 11 Rx queues and then increases steeply *to reach line rate *at 12 queues. The maximum capture rate with 11 Rx queues is around 80 Gbps and with 12 Rx queues is 99. Gbps.* *Is it something to do with DPDK ? Or Mellanox specific?* -- Regards Rajesh R