From: Robert Klemme <shortcutter@...>
Date: 2006-09-01T17:05:35+09:00
Subject: Re: Testing Threads with connections

On 01.09.2006 02:16, Denis Vieira wrote:
> Hello there,
> 
> I've been trying to make a stress test generator in ruby for a New IO 
> echo server initially.
> 
> Mainly, the idea is try to generate as many connections as possible to 
> the echo server, and from time to time, send a string to the server and 
> receive it back.
> 
> I don't really have much experience in threads programming, and that's 
> the main reason to try it out.
> 
> For this script, I thought to open <N> threads, and in each thread, do a 
> loop and open <X> connections for each thread. I tried to use 100 
> threads and in each thread, open 100 connections. It runs fine, no 
> errors reported to me at all, but the echo server shows only ~1200 
> connections.
> 
> I've set up the OS settings with ulimit already (open files).
> 
> What do you guys think ? Any suggestions?

Insert this at the top of your script to see whether there are 
exceptions during connection creation:

Thread.abort_on_exception = true

Alternatively, wrap each thread's main processing body in a begin rescue 
end to print out exceptions.  (Thinking about it I'd prefer the second 
approach anyway as it makes up for more robust software.)  HTH

Kind regards

	robert