Re: [Bloat] What is wrong with Microsoft's receive window auto-tuning?

2014-09-12 Thread Jerry Jongerius
st curious. There seems to be a lot of room for improvement in the algorithms... - Jerry -Original Message- From: Eric Dumazet [mailto:eric.duma...@gmail.com] Sent: Thursday, September 11, 2014 1:06 PM To: Jerry Jongerius Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] What is

Re: [Bloat] What is wrong with Microsoft's receive window auto-tuning?

2014-09-11 Thread Eric Dumazet
On Thu, 2014-09-11 at 19:40 +0200, Steinar H. Gunderson wrote: > On Thu, Sep 11, 2014 at 10:05:46AM -0700, Eric Dumazet wrote: > >> Is anyone aware of any research either pointing out how their tuning > >> algorithm works, or of known bugs/problems with the algorithm? > > How BDP suggests a receive

Re: [Bloat] What is wrong with Microsoft's receive window auto-tuning?

2014-09-11 Thread Steinar H. Gunderson
On Thu, Sep 11, 2014 at 10:05:46AM -0700, Eric Dumazet wrote: >> Is anyone aware of any research either pointing out how their tuning >> algorithm works, or of known bugs/problems with the algorithm? > How BDP suggests a receive window of 750k ? > > If BDP _is_ 750k, then 3.8 MB receive window is

Re: [Bloat] What is wrong with Microsoft's receive window auto-tuning?

2014-09-11 Thread Eric Dumazet
On Mon, 2014-09-01 at 13:23 -0400, Jerry Jongerius wrote: > I am noticing (via WireShark traces) at times that Microsoft's (Windows 7) > receive window auto-tuning goes horribly wrong, causing significant buffer > bloat. And at other times, the tuning appears to work just fine. > > For example, B

[Bloat] What is wrong with Microsoft's receive window auto-tuning?

2014-09-01 Thread Jerry Jongerius
I am noticing (via WireShark traces) at times that Microsoft's (Windows 7) receive window auto-tuning goes horribly wrong, causing significant buffer bloat. And at other times, the tuning appears to work just fine. For example, BDP suggests a receive window of 750k, and most often Windows tunes a