From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (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 56C423B29E for ; Tue, 23 May 2017 15:50:56 -0400 (EDT) Received: by mail-pf0-x242.google.com with SMTP id f27so29659199pfe.0 for ; Tue, 23 May 2017 12:50:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:subject:from:to:cc:date:in-reply-to:references :mime-version:content-transfer-encoding; bh=SMJhrGgOnFQXqWbRNe0JmHTgoZd5Vbg4NYOo2aymIRk=; b=UQ0E4wc/xplt/X/GP9b1WoKXxdQNoYc0hWysj/nHArAmfSRGcjRKntLrvqUGGNjQ4s o3UZtxZM/AsLWxh0V0XS23hpghQ39m+dBqRf+YEGtNh3bjtbkdmgVrrX0jy3xngmSxn9 yzU/7fxGGsPHRvu+ETjS70BTRnu4f9cRVM8/PFgX010I/LiTx26+1b27D7SHojuRGisR He1MHbfQ8fZFX9ONtP0ssuAnsKoh+W9ylQprexGYKBGjSsci6iQt1/4SrqYDPSY1Jd3I iid5JcIDXuIYzRQmqyi+WzcwRSqfPvnIGg+4FbMA9dFR/53qVD0TNJz5+H7E0J+wPVBd 22Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:mime-version:content-transfer-encoding; bh=SMJhrGgOnFQXqWbRNe0JmHTgoZd5Vbg4NYOo2aymIRk=; b=TDGT7E0VkHC6J8eK5AkAK1AO6kk6TpnmYTKnYMBKJblDnB/weyeaiXtCZB7r1E7Jxq 4/h/n//XGOLG9IqwVBC9so0z+54ZTTr0YHh42ZoK44LE6zqjCj/dtieFNW0JfqFa2YPf H72NjBNFIAHmeD5uj+7rwhPHvqn2unFgeAXvaukfQAurZbo7I19XYRdNgcChOJaBZCSy tMe42fjQ4kPREHhbq5RcSkXWDqkE/RBRO0om0y6d3Jg6cT12vvfOQeessc3wIVONM/b7 dNwUBF7PBmWrEhg/9xAjuE5zhCDFA4lNJMnLp2jIF9Cjoh4l+90QsNaq86cXyaHW55o2 SKmw== X-Gm-Message-State: AODbwcA4Pm/Wjogv8hvDdWOtBW2HlNsEX6Y0by7fE4KCW4tSNDn8sTFZ Ardkup6ysDb6YA== X-Received: by 10.84.171.193 with SMTP id l59mr37458493plb.139.1495569055556; Tue, 23 May 2017 12:50:55 -0700 (PDT) Received: from ?IPv6:2620:15c:2c1:100:69e3:56cc:5d1d:5c5c? ([2620:15c:2c1:100:69e3:56cc:5d1d:5c5c]) by smtp.googlemail.com with ESMTPSA id n22sm3223525pfa.123.2017.05.23.12.50.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 May 2017 12:50:54 -0700 (PDT) Message-ID: <1495569054.6465.77.camel@edumazet-glaptop3.roam.corp.google.com> From: Eric Dumazet To: Jim Gettys Cc: Kathleen Nichols , bloat Date: Tue, 23 May 2017 12:50:54 -0700 In-Reply-To: References: <68972d45-9112-6202-7e6d-7dfc7349530b@pollere.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] passive network delay monitoring utility 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: Tue, 23 May 2017 19:50:56 -0000 I had the honor to attend Kathleen presentation at Google ;) I then worked on making sure TCP TS TSval would use 1ms units, regardless of CONFIG_HZ option in the kernel, since apparently some distros/devices use HZ=250 or even HZ=100 This should be in linux-4.13 when released. https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=9a568de4818dea9a05af141046bd3e589245ab83 Cover letter for the patch series : https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=e26925ec03b31f5ae4c1fc544515486229334ef9 On Tue, 2017-05-23 at 15:22 -0400, Jim Gettys wrote: > Those of you who have not looked at pping should do so. > > > See: http://pollere.net/pping.html for a description, and look at the > slides linked to on that page. > > > In particular, it would be sweet to run this on a home router, as you > can monitor latency simultaneously in either direction. Then we can > point a finger properly at the ISP or at the WiFi in the home network > (encouraging either/both to get fixed). > > > Anyone interested in undertaking such a project with me, please drop > me a note. > > > The only downside is that pping is a C++ app, which makes it big for a > home router, so it can't be used on old small home routers due to > footprint issues; but many current home routers would have space for > it. > > > - Jim > > > > > > > > On Sun, Apr 30, 2017 at 8:41 PM, Kathleen Nichols > wrote: > > Hi, > I've just made one of the tools I use to measure network delay > available with a GPLv2 license. Perhaps it will be of > intererst. > > https://github.com/pollere/pping > > Kathie > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat > > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat