Re: Select/Poll

[khandelw@cs.fsu.edu]

I meant it in the context of TCP. I thought it was implicit enough, because if
he was using UDP then packet loss is expected. (not necessary that it will
happen)

- Amit Khandelwal

 Quoting Mike Jagdis <mjagdis@eris-associates.co.uk>:

> On Wed, Jun 02, 2004 at 11:28:29AM -0400, khandelw@cs.fsu.edu wrote:
> > Hello,
> >    Can you give more details - Like which machine which vendor etc.,
> > On a sony vaio pcg frv31 laptop/ redhat 9.0/ after firing some 36,000+
> request
> > my select multiplexed server used to fail. With select I believe you not
> get
> > any packet loss...
>
> Then you'd be wrong. Poll/select tell you when desriptors
> are readable/writable. They do *not* impose any magic queuing
> mechanism that guarantees the buffers won't overflow. If the
> low level protocol is non-flow controlled like UDP you *have*
> to read data faster than it arrives and not write data faster
> than it is being transmitted.
>
> Mike
>
> --
> Mike Jagdis                        Web: http://www.eris-associates.co.uk
> Eris Associates Limited            Tel: +44 7780 608 368
> Reading, England                   Fax: +44 118 926 6974
>