Re: High UNIX socket latency

[GOTO Masanori <gotom@debian.or.jp>]

At Tue, 13 Nov 2001 12:51:26 +0100,
Jakob Ostergaard <jakob@unthought.net> wrote:
> In another application where I use a UNIX STREAM socket, I get
> a typical latency of one send() of around 1 ms.
> 
> I cannot set TCP_NODELAY on a UNIX socket, and I can't really
> see why I get the high latency.   Is there some undocumented
> option like TCP_NODELAY for UNIX STREAM connections, or are there
> other tricks I can play to get the latency down ?
>
> One process does a send(), the other one does a select() and a
> recv() - and the time from the send() to the recv() is around 1 ms
> which I think seems far too high.

I think more details are needed... kernel version, packet size, 
select timeout, your program/environment, the result of
average responce time and each responce time, throughput, etc.

-- gotom