From owner-freebsd-net  Thu Sep 27 10:15:36 2001
Delivered-To: freebsd-net@freebsd.org
Received: from mrout2.yahoo.com (mrout2.yahoo.com [216.145.54.172])
	by hub.freebsd.org (Postfix) with ESMTP id 130BD37B428
	for <net@FreeBSD.ORG>; Thu, 27 Sep 2001 10:15:32 -0700 (PDT)
Received: from milk.yahoo.com (milk.yahoo.com [216.145.52.137])
	by mrout2.yahoo.com (8.11.6/8.11.6/y.out) with ESMTP id f8RHEx911343;
	Thu, 27 Sep 2001 10:14:59 -0700 (PDT)
Received: (from root@localhost)
	by milk.yahoo.com (8.11.0/8.11.0) id f8RHExg26899;
	Thu, 27 Sep 2001 10:14:59 -0700 (PDT)
	(envelope-from jayanth)
Date: Thu, 27 Sep 2001 10:14:59 -0700
From: jayanth <jayanth@yahoo-inc.com>
To: tsuchiya@flab.fujitsu.co.jp
Cc: jayanth@yahoo-inc.com, net@FreeBSD.ORG, silby@silby.com
Subject: Re: TCP performance question
Message-ID: <20010927101459.A26671@yahoo-inc.com>
References: <200109270652.PAA03232@const.kawasaki.flab.fujitsu.co.jp>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2i
In-Reply-To: <200109270652.PAA03232@const.kawasaki.flab.fujitsu.co.jp>; from tsuchiya@flab.fujitsu.co.jp on Thu, Sep 27, 2001 at 03:52:15PM +0900
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-net.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org

Probably add a new flag TF_IDLE that is true, if there is more data
to send when the connection was idle. This way the next time
around the idle variable will be true if the TF_IDLE flag is true 
and if we can empty the socket buffer all the data will be sent.

Will send you a patch soon.

jayanth

tsuchiya@flab.fujitsu.co.jp (tsuchiya@flab.fujitsu.co.jp) wrote:
> 
> >	This issue is a combination of mbuf cluster size and the 
> >	TF_MORETOCOME flag.
> 
> >	        if (len) {
> >	                if (len == tp->t_maxseg)
> >	                        goto send;
> >	                if (!(tp->t_flags & TF_MORETOCOME) &&
> >	                    (idle || tp->t_flags & TF_NODELAY) &&
> >	                    (tp->t_flags & TF_NOPUSH) == 0 &&
> >	                    len + off >= so->so_snd.sb_cc)
> >	                        goto send;
> 
> When I changed the condition, the problem we had did not occur. I am wondering
> what is the right fix.
> Yoshi
> 
> 

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message