From: Jim Gettys <jg@freedesktop.org>
To: Hal Murray <hmurray@megapathdsl.net>
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] The challenge
Date: Thu, 10 May 2012 09:12:46 -0400 [thread overview]
Message-ID: <4FABBECE.7040707@freedesktop.org> (raw)
In-Reply-To: <20120510083002.A6AE5800037@ip-64-139-1-69.sjc.megapath.net>
On 05/10/2012 04:30 AM, Hal Murray wrote:
>> It is counter-intuitive to keep a queue filled with packets that you might
>> drop later - as an engineer you tend to think it is more efficient to drop a
>> packet *before* it starts to consume space in your precious queue. This is
>> a good deal of what needs to be solved in wireless drivers ...
Memory is so cheap that in a wireless router these days the buffers are
in the noise of memory consumption.
> On the other hand, if your problem is buffer bloat, maybe the queue space
> isn't so precious.
>
> Yes, I too tend to think that way, but maybe it will sink in if I see a few
> reminders. Thanks.
The only place where memory cost is still any issue is in very high end
routers. There, it's been shown you don't need the traditional BDP
buffering anyway, but much, much less.
- Jim
next prev parent reply other threads:[~2012-05-10 13:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-10 8:30 Hal Murray
2012-05-10 13:12 ` Jim Gettys [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-05-09 1:04 Dave Taht
2012-05-09 2:02 ` Kevin Gross
2012-05-09 5:16 ` Simon Barber
2012-05-09 5:40 ` Eric Dumazet
2012-05-09 5:41 ` Dave Taht
2012-05-09 13:04 ` Kevin Gross
2012-05-16 5:55 ` Jonathan Morton
2012-05-16 6:09 ` Eric Dumazet
2012-05-16 6:09 ` Dave Taht
2012-05-09 19:10 ` Roger Jørgensen
2012-05-09 19:15 ` Dave Taht
2012-05-09 19:28 ` Dave Taht
2012-05-09 20:02 ` Simon Barber
2012-05-09 20:06 ` Fred Baker
2012-05-09 21:47 ` Jim Gettys
2012-05-10 2:34 ` Jonathan Morton
2012-05-10 2:37 ` Dave Taht
2012-05-10 6:35 ` David Woodhouse
2012-05-10 6:54 ` Jonathan Morton
2012-05-10 7:02 ` David Woodhouse
2012-05-10 14:25 ` Justin McCann
2012-05-10 14:42 ` David Woodhouse
2012-05-10 15:34 ` Neil Davies
2012-05-14 7:27 ` Jonathan Morton
2012-05-14 13:55 ` David Woodhouse
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