From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x233.google.com (mail-qk0-x233.google.com [IPv6:2607:f8b0:400d:c09::233]) (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 28AEA3B29E for ; Tue, 17 Apr 2018 09:52:33 -0400 (EDT) Received: by mail-qk0-x233.google.com with SMTP id s70so4927678qks.13 for ; Tue, 17 Apr 2018 06:52:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=Re+NxgUcNrwQVLgi+QyUp91Ru429xiJkEbHoh9M9EjI=; b=KC32dub6xWjiScOVD6ej3VPtL0vpeIj3H4T8FixiB3BgEp+vUrxxjfKZh1JDpAv+Zm NB5skxgcxf6e/ho7AXl72M0DpCG0y1d+rhA19MQYCfZFRrEBIT0ffnRCb9gn+Ano6WMQ TVMUuqJqijJJfMDZdD/7hkdkGmanH52VeEUhPP3W0txlDEdwFVtZe4RJS3BsJ2HY+s5o CdWKeeKHA8do/O+PbZ85tYcnqVjdHxB2nx2rF/+PWfjvgKg4FjH7wSjhju2vOAQPfeM/ AZppwaaP2+1Ib/Yuhn0DmORlE3b+I7IbrN1iSau7IMPkLr8xB0HwYkOW95SLixQXrGkd tIgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=Re+NxgUcNrwQVLgi+QyUp91Ru429xiJkEbHoh9M9EjI=; b=pybjG3dHqibsG4Xe/56xoDjKzEm5XvLh5XRcRMcdQqT8uwROkyJjYhyXmBbiq9tyf4 ASrFykACU27SAy/kUFJrgDlCqWPfvDcntddVmaHo1zkP1AZGlD7mCFwA63igzk/UK7b0 FF3b8LHyAelcb/rNDiklZ2RJ+gAd6XBUwDkPoxUo3V/pgGAoyu66prAq+BOo3F1XSxUp 2jWGfhxFFzHYLtfynHPLQja6/ftzXg+D8Xc7C/hJtH2u8pDgYZTdYLnUJDsGiyTSksgR 8jCoq7JTybpVfcncT6xndX6qvViy3PdIF4DQ1GvsABZb3SZVNQfQY8Q5vmZNNGOlAlu7 wUXQ== X-Gm-Message-State: ALQs6tDOOQcm/DVtZs/wxS7gI2W0CAlJcvtASYmgibaBgtMI75RSx611 yC3g0jb6AklDPcivG1/XCfCT9Y+6ECGh3auvf9cEOA== X-Google-Smtp-Source: AIpwx4/wFUkDyNYHDUVefuFFK2M1WQZ8TnyyQfr90sRIKY8/Pq8pXWMRckMz3X51wgHItQw+0bAvfdLQnJL0rWET6Rk= X-Received: by 10.55.132.132 with SMTP id g126mr2467008qkd.108.1523973152813; Tue, 17 Apr 2018 06:52:32 -0700 (PDT) MIME-Version: 1.0 Received: by 10.12.209.134 with HTTP; Tue, 17 Apr 2018 06:52:32 -0700 (PDT) In-Reply-To: <87muy23tvg.fsf@toke.dk> References: <87vacq419h.fsf@toke.dk> <87sh7u3yoa.fsf@toke.dk> <87muy23tvg.fsf@toke.dk> From: Luca Muscariello Date: Tue, 17 Apr 2018 15:52:32 +0200 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Cc: Y , Cake List Content-Type: multipart/alternative; boundary="94eb2c0779a26bbc2d056a0ba6e9" Subject: Re: [Cake] A few puzzling Cake results X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Apr 2018 13:52:33 -0000 --94eb2c0779a26bbc2d056a0ba6e9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I'm not sure that the quantum correction factor is correct. On Tue, Apr 17, 2018 at 2:22 PM, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > Y via Cake writes: > > > From: Y > > Subject: Re: [Cake] A few puzzling Cake results > > To: cake@lists.bufferbloat.net > > Date: Tue, 17 Apr 2018 21:05:12 +0900 > > > > Hi. > > > > Any certain fomula of fq_codel flow number? > > Well, given N active bulk flows with packet size L, and assuming the > quantum Q=3DL (which is the default for FQ-CoDel at full-size 1500-byte > packets), the maximum rate for a sparse flow, R_s, is bounded by > > R_s < R / ((L/L_s)(N+1)) > > Where R is the link rate and L_s is the packet size of the sparse flow. > This assumes that the sparse flow has constant spacing between its > packets, which is often the case for a VoIP flow... > > -Toke > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake > --94eb2c0779a26bbc2d056a0ba6e9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I'm not sure that the quantum correction factor is cor= rect.

On Tue, = Apr 17, 2018 at 2:22 PM, Toke H=C3=B8iland-J=C3=B8rgensen <toke@toke.dk>= wrote:
Y via Cake <cake@lists.bufferbloat.net> write= s:

> From: Y <intruder_tkyf@ya= hoo.fr>
> Subject: Re: [Cake] A few puzzling Cake results
> To: cake@lists.bufferblo= at.net
> Date: Tue, 17 Apr 2018 21:05:12 +0900
>
> Hi.
>
> Any certain fomula of fq_codel flow number?

Well, given N active bulk flows with packet size L, and assuming the
quantum Q=3DL (which is the default for FQ-CoDel at full-size 1500-byte
packets), the maximum rate for a sparse flow, R_s, is bounded by

R_s < R / ((L/L_s)(N+1))

Where R is the link rate and L_s is the packet size of the sparse flow.
This assumes that the sparse flow has constant spacing between its
packets, which is often the case for a VoIP flow...

-Toke
_____________________= __________________________
Cake mailing list
Cake@lists.bufferbloat.net
https://lists.bufferbloat.net/listinfo/cake

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