netdev - RE: Can I limit the number of active tx per TCP socket?

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D0F6D3F7B@AcuExch.aculab.com>
Date:	Thu, 6 Mar 2014 15:03:11 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'John Heffner' <johnwheffner@...il.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: Can I limit the number of active tx per TCP socket?

From: John Heffner 
> On Thu, Mar 6, 2014 at 7:28 AM, David Laight <David.Laight@...lab.com> wrote:
> > Is it possible to stop a TCP connection having more than one
> > tx skb (in the ethernet tx ring) at any one time?
> > The idea is to allow time for short sends from the application
> > to accumulate so that the transmitted frames are longer.
>
> Is TCP_CORK what you're looking for?

No - TCP_CORK requires that you know you have more data to send.
In which case you are better off saving the system calls and
sending it with sendv() or writev().

I may well write the code to sit on the data for up to a ms
before sending it.  The data is sent out on a 64k line so
1ms is only 8 byte times.

	David

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