From: Rick Jones <rick.jones2@hp.com>
To: Stephen Hemminger <shemminger@vyatta.com>
Cc: Injong Rhee <rhee@ncsu.edu>, Injong Rhee <rhee@eos.ncsu.edu>,
netdev@vger.kernel.org
Subject: Re: [PATCH] CUBIC v2.3 with new improved slow start
Date: Wed, 29 Oct 2008 16:53:25 -0700 [thread overview]
Message-ID: <4908F775.9040504@hp.com> (raw)
In-Reply-To: <20081029164045.7422b68d@extreme>
Stephen Hemminger wrote:
> On Wed, 29 Oct 2008 19:14:03 -0400
> "Injong Rhee" <rhee@ncsu.edu> wrote:
>
>
>>>This looks like a good optimization, it obviously needs more testing
>>>because Linux always seems to find new broken hardware. The areas
>>>that need to be tested should include:
>>> * MacOs has a broken version of delayed ack that might cause
>>> HyStart to radically underestimate.
>>
>>We tested with FreeBSD. I presume that it covers MacOS. We will look into
>>that.
>
>
> No Darwin added some stupid code that holds off acks for up to 2 seconds.
Is this Apple's reimplementation of the ACK avoidance heuristics in OSX
they used to have in previous versions of MacOS with the Mentat TCP/IP
stack?
FWIW, HP-UX and Solaris also have ACK avoidance heursistics - they have
a Mentat history - although both should be pretty good and neither
should hold-off ACKs for two seconds...
rick jones
next prev parent reply other threads:[~2008-10-29 23:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-29 21:28 [PATCH] CUBIC v2.3 with new improved slow start Injong Rhee
2008-10-29 22:39 ` Stephen Hemminger
2008-10-29 23:14 ` Injong Rhee
2008-10-29 23:40 ` Stephen Hemminger
2008-10-29 23:53 ` Rick Jones [this message]
2008-10-30 0:54 ` Injong Rhee
2008-10-30 1:08 ` Rick Jones
2008-10-29 23:45 ` David Miller
2008-10-30 15:36 ` [PATCH] tcp: mark BIC as experimental Stephen Hemminger
2008-10-31 7:50 ` David Miller
2008-10-31 16:41 ` Stephen Hemminger
2008-10-31 19:04 ` David Miller
2008-10-31 19:16 ` [RFC] tcp: make H-TCP the default congestion control Stephen Hemminger
2008-10-31 19:43 ` Sangtae Ha
2008-10-31 20:02 ` rhee
2008-11-02 4:29 ` David Miller
2008-11-02 7:27 ` [PATCH] CUBIC v2.3 with new improved slow start David Miller
2008-11-03 22:19 ` Sangtae Ha
2008-11-03 22:49 ` Stephen Hemminger
2008-11-04 1:12 ` David Miller
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