Thanks for your answers!

Well, i will need to wait for a back port from kernel 2.5 to 2.4 ...

I'm trying to get a better performance with Tomcat (a servlet
container).

The servlet spec say '1 request: 1 thread', then with high concurrent
requests, my server is less responsive.

Thanks



El mar, 20-08-2002 a las 13:21, Juergen Kreileder escribió:
> Mauricio Nuñez <[EMAIL PROTECTED]> writes:
> 
> > Blackdown JVM 1.3 support green and native threads, but 1.4 only
> > native.  Threading is an important issue for the server side java
> > applications.
> > 
> > Green threads are very scalable ( see Volano report ),
> 
> Yes, but only on one CPU.
> 
> > while the native threads under Linux are a limited to few , before
> > the server crash.
> 
> 1.4 supports multiplexed non-blocking I/O.  Using that gives much
> better scalability than blocking I/O with one thread per client (even
> with m:n mapping).
> 
> > IBM released a new thread library ( Next Generation Threads )
> > supporting M:N mapping ( Linux use 1:1 ), but there are none JVM
> > ready yet to work with that library.
> 
> > It's posible for Blackdown release a JVM 1.4 with green threads 
> 
> No.
> 
> > or NGthreads ?
> 
> Not in the near future because a) I doubt that it will replace
> LinuxThreads anytime soon[1], b) it hasn't proven to be stable yet,
> and c) it isn't fully preemptive yet.  
> (And we don't have enough man-power to work on this too currently.)
> 
> BTW, note that Solaris is actually going back to a 1:1 model[2].
> 
> 
>         Juergen
> 
> Footnotes: 
> [1]  http://sources.redhat.com/ml/libc-alpha/2002-01/msg00367.html
> [2]  http://java.sun.com/docs/hotspot/threads/threads.html
> 
> -- 
> Juergen Kreileder, Blackdown Java-Linux Team
> http://www.blackdown.org/java-linux/java2-status/
> 
> 
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