Re: Nagle Algorithm

[Karl Hammar <karl@kalle.csb.ki.se>]

TCP_NODELAY does it.
Use setsockopt(2)/getsockopt(2) to change the setting, like in

  int s = socket(...);
  int val = 1;
  int len = sizeof(val);
  int status = setsockopt( s, IPPROTO_TCP, TCP_NODELAY, &val, &len );

There don't seem to be any /proc/sys/net/ipv4 file available to change
the setting.

I don't know how that translates to MPICH, you possible have to hunt
down socket(2) calls in the source.

Regards,
/Karl

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Karl Hammar                    Aspö Data           karl@kalle.csb.ki.se
Lilla Aspö 2340             +46  173 140 57                    Networks
S-742 94 Östhammar         +46  10 270 26 67                  Computers
Sweden                                                       Consulting
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From: "A. N. Spyropoulos" <aspyr@orfeas.chemeng.ntua.gr>
Subject: Nagle Algorithm
Date: Wed, 7 Feb 2001 07:43:34 +0200

> Hello to all,
> 
> My name is Antony Spyropoulos and I'm new to this list.
> Could you give me instructions how to disable Nagle Algorithm.
> Kernel version: 2.2.17
> Message passing: MPICH 1.1.2
> 
> Thank you in advance