netdev
[Top] [All Lists]

Re: [RFT] BIC TCP delayed ack compensation

To: Hubert Tonneau <hubert.tonneau@xxxxxxxxxxxxxx>
Subject: Re: [RFT] BIC TCP delayed ack compensation
From: Stephen Hemminger <shemminger@xxxxxxxx>
Date: Tue, 22 Feb 2005 16:58:02 -0800
Cc: cliff white <cliffw@xxxxxxxx>, Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, Injong Rhee <rhee@xxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>
In-reply-to: <052Q0TU11@xxxxxxxxxxxxxxxxxxxxx>
Organization: Open Source Development Lab
References: <052Q0TU11@xxxxxxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
On Tue, 22 Feb 2005 22:22:42 GMT
Hubert Tonneau <hubert.tonneau@xxxxxxxxxxxxxx> wrote:

> Stephen Hemminger wrote:
> >
> > This patch which was extracted from BIC TCP 1.1 compensates
> > for systems (like MaxOSX) that don't ACK every other packet.
> > It has no impact for normal transfers, but might help with problems
> > with Mac like Hubert found.
> 
> No, it's even worse.
> 
> 2.6.9 to 100 Mbps connected MacOSX: 15 seconds (for roughly 100 MB or data)
> 2.6.9 to gigabit connected MacOSX: 5 seconds
> 2.6.10-ac11 to 100 Mbps connected MacOSX: 325 seconds
> 2.6.10-ac11 to gigabit connected MacOSX: 5 seconds
> 2.6.10-ac11+BIC to 100 Mbps connected MacOSX: 620 seconds
> 2.6.10-ac11+BIC to gigabit connected MacOSX: 5 seconds

Thanks, that is really interesting...

<Prev in Thread] Current Thread [Next in Thread>