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<H1>[Nel] NeL Network Engine</H1>
<B>Vincent Caron</B>
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TITLE="[Nel] NeL Network Engine">v.caron@zerodeux.net</A><BR>
<I>Wed, 28 Feb 2001 15:30:32 +0100</I>
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<PRE>Vianney Lecroart wrote:
><i>
</I>><i> What we don't know is the thread number limit after what the system uses too
</I>><i> much CPU. In the linuxthread faq, they
</I>><i> said that an application should not create more than 100 thread. In this
</I>><i> case, we have to forget the solution where each
</I>><i> socket is on a thread and use a blocked receive(). The problem is that
</I>><i> select() is quite slow and if we have only 100 thread,
</I>><i> each thread needs to manage, with a select(), around 50 players and we ll
</I>><i> lost lot of time to create the array for the select()
</I>><i> and check who have wakeup the select().
</I>
Looking at Apache or Samba projects, it seems that a good compromise is to
set a 'maximum client requests by thread' and spawns threads accordingly.
Apache uses process forking and memory sharing, but the design remains the
same. You then just tune this max_request_by_thread for each OS, say 1 for
Solaris which is said thread-efficient, 10 for Linux ? Just a hint ...
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