From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 447093B2A4 for ; Fri, 25 Sep 2020 13:25:20 -0400 (EDT) Received: by mail-pf1-x436.google.com with SMTP id f18so3810934pfa.10 for ; Fri, 25 Sep 2020 10:25:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:mime-version :content-transfer-encoding; bh=5uMG/pX6kp2+J4SaBlbhdpD/ZowZryGuKT3nJVQ3/14=; b=pjuqqok0EnPFjtNx8OO8zIZTKLT6c/HQCgAvah0jwZPPBshCTZq5K/Rmr2NHZ42xH7 cyEEvTZM4idrSuHHOk3j4Sc53msE2CEb5myS139Y3K3QLCr28gPRZBOpegLDib2nFTMl BZFP83tSaY2TYMQcQptas+K6itY6Vdcx+u8p7ARmZQKFK018NHY1j5W0Gb4ItALZ8owA L+r+G7hqk1oqhBkWCWcKWFoeWvByAyvaPZ3MeXYf94ugIaX9OwgONsX5SHJAWDPEunrv kSsTzPrl1H7/GTge80HSCUHvbnOw2hFS4l62bUeY6CUZqgIFkz2VkIuoYrA1rfxLCaEW CQ2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-transfer-encoding; bh=5uMG/pX6kp2+J4SaBlbhdpD/ZowZryGuKT3nJVQ3/14=; b=YqwqF3wspwoWD1GC7V3n0tLmLeYKduDN1wgoOvicSRVvVtGPgQhpqic/nkVp+CS5BI WsBfLwpWHlTqTDCrYyg8x85Tp6ECxrdJ3QJUK15q9fGiq5BBW4dYsXtrsX9zdfoalIl3 aIizddHNuDJRrHGpFdxRkL+mE3TQ2YICg821ONV79gs33/Znc2cULYYe/fsxzjAKP9zx 41rGHf3bhseoUvC8WQmWYFXNwlw96lU3BRKASxuh0cLOAclcwkLbO72HW5rjm72/+ckT Ypnxueoary92KCADWx2GbGDUkxQCMXPkgQjAAA4P40uqpGD82fLNOL1EsusQ+W/6DEaI Ig4Q== X-Gm-Message-State: AOAM532jhFxz7MGoVGZPGJuOEiM+3FeMV/yWG2iJsfNMR90Z6mTOJzfL 7ZnbPmwA+RMiA/GTwDk5KMNBKA== X-Google-Smtp-Source: ABdhPJzJWggxlhSbA0+qIS+fsnI+HuxR9a82CSmTv4UTYsW8qyKNF/ZKKvaE8r7fzDe1y57a6Bwz2g== X-Received: by 2002:a17:902:7083:b029:d2:4ca:281a with SMTP id z3-20020a1709027083b02900d204ca281amr419639plk.58.1601054719348; Fri, 25 Sep 2020 10:25:19 -0700 (PDT) Received: from hermes.lan (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id gx5sm2528226pjb.57.2020.09.25.10.25.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2020 10:25:19 -0700 (PDT) Date: Fri, 25 Sep 2020 10:25:11 -0700 From: Stephen Hemminger To: Dave Taht Cc: bloat@lists.bufferbloat.net Message-ID: <20200925102511.2ded2646@hermes.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: [Bloat] NeST: Network Stack Tester X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Sep 2020 17:25:20 -0000 This looks interesting: https://blog.apnic.net/2020/09/18/nest-a-simpleefficient-tool-to-study-congestion-control/ Good - using namespaces for testing is a good idea. - testbed is GPLv2 Bad - using iperf as your main test tool encourages buffer bloat - Does 5G really need yet another congestion control algorithm? Or it this just a way to get the grant money? Or worse, the start of proprietary TCP congestion control.