Achilleus Mantzios wrote:
> I read somewhere in the docs that win 2000 may outperform linux kernel 2.2
> even by 2 times when not using apache/jetty for thread mngmnt, because
> of the lack of "real" linux threads.
> As far as i know this is not the case in kernel 2.4 which supports
> kernel-space threads.
The issue is deaper than kernel threads. Linux threads are treated by
the kernel scheduler exactly the same as processes, and with native
threads one Java thread is one kernel thread. This can overload the
scheduler on a busier system. In contrast, Solaris and AIX (for example)
have thread models where a user thread isn't necessarily a kernel thread
- kernel threads are created only when needed, so you can have some
number M of user threads (Java threads, in our case) mapped to some
smaller number N of kernel threads. Much easier on the kernel scheduler.
However, IBM has just released (as a 1.0) a new thread library for Linux
that does this M to N mapping. I haven't given it a try yet, but here's
the link.
http://oss.software.ibm.com/developerworks/projects/pthreads/
-danch
_______________________________________________
JBoss-user mailing list
[EMAIL PROTECTED]
http://lists.sourceforge.net/lists/listinfo/jboss-user
