Re: TCP/IP Speed

[Richard B. Johnson]

On Wed, 30 Jan 2002, Zwane Mwaikambo wrote:

> On Wed, 30 Jan 2002, Richard B. Johnson wrote:
> 
> > 
> > When I ping two linux machines on a private link, I get 0.1 ms delay.
> > When I send large TCP/IP stream data between them, I get almost
> > 10 megabytes per second on a 100-base link. Wonderful.
> > 
> > However, if I send 64 bytes from one machine and send it back, simple
> > TCP/IP strean connection, it takes 1 millisecond to get it back? There
> > seems to be some artifical delay somewhere.  How do I turn this OFF?
> 
> I would say its all in the TCP connection initiation (socket(), create() 
> etc...)

But it's already connected.

         host:
         for (;;) {
            gettimeofday(...);
            write(s, buf, 64);
            read(s, buf, sizeof(buffer));
            gettimeofday(...);
         /* delay is 1.0 ms */
         }
         server is IPPORT_ECHO

Cheers,
Dick Johnson

Penguin : Linux version 2.4.1 on an i686 machine (797.90 BogoMips).

    I was going to compile a list of innovations that could be
    attributed to Microsoft. Once I realized that Ctrl-Alt-Del
    was handled in the BIOS, I found that there aren't any.