Re: [Fwd: [Fwd: Is sendfile all that sexy? (fwd)]]

[Andrea Arcangeli]

On Thu, Jan 18, 2001 at 11:52:33AM -0800, Linus Torvalds wrote:
> On Thu, 18 Jan 2001, Ingo Molnar wrote:
> > 
> > i believe a network-conscious application should use MSG_MORE - that has
> > no system-call overhead.
> 
> I think Andrea was thinking more of the case of the anonymous IO
> generator, and having the "controller" program thgat keeps the socket
> always in CORK mode, but uses SIOCPUSH when it doesn't know what teh
> future access patterns will be. 

Yes. Your one is an example where TCP_CORK is necessary to make sure not to
send small packets and where instead MSG_MORE can't help.

> Basically, it could use SIOCPUSH whenever its request queue is empty,
> instead of uncorking (and re-corking when the next request comes in).

Exactly.

Andrea