On Wed, 30 Jan 2002, Dan Maas 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?
>
> Stupid question - did you turn Nagle off?
>
> int one = 1;
> setsockopt(fd, SOL_TCP, TCP_NDELAY, &one);
>
> (I think; typing from memory...)
>
> Regards,
> Dan
>
I did, but I thought it was a TCP option, not a socket option.
I will change it and see if it does anything. Currently, it
seems like a no-op, no errors, but does nothing.
Early in code:
int on = 1;
#define ON &on
Where accept is called. Returned socket value is set to nodelay.
len = sizeof(addr);
if((hs = accept(s, SSAP &addr, &len))) == FAIL)
ERRORS(Accept);
if(setsockopt(hs, IPPROTO_TCP, TCP_NODELAY, ON, sizeof(on)) == FAIL)
ERRORS(Setsockopt);
So, maybe it's supposed to be SOL_TCP? I'll look for it.
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.
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This archive was generated by hypermail 2b29 : Thu Jan 31 2002 - 21:01:22 EST