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Sat Nov 12 19:29:10 PST 2005

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<TITLE>RE: diff between green and native threads</TITLE>
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<P><FONT SIZE=2>&gt; Hi</FONT>
<BR><FONT SIZE=2>&gt; Could anybody tell me the difference between Green Threads and Native</FONT>
<BR><FONT SIZE=2>&gt; Threads in Java ??</FONT>
</P>

<P><FONT SIZE=2>Green Threads vs Native Threads</FONT>
</P>

&quot;You may hear the terms &quot;green threads&quot; and &quot;native threads&quot;. This
 refers to the Unix implementations of Java. When Java 1.0 first
 came out on Solaris, it did not use the native Solaris library
 libthread.so to support threads. Instead it used runtime thread
 support that had been written in Java for an earlier project
 code-named &quot;Green.&quot; That thread library came to be known as &quot;green
 threads.&quot;

&quot;Thread support on Windows used the native libraries from the start,
 but on Solaris green threads were used. That meant that threaded
 programs running on Solaris didn't get the benefit of the native
 libraries. In particular, if your Java program was executing on a
 multi processor Solaris system, it was never the case that different
 threads could execute truly in parallel by being dispatched on
 different processors. There are other benefits too, to do with more
 efficient mapping of I/O system calls.&quot;

<P><FONT SIZE=2>From Just Java 2 Fourth Edition by Peter van der Linden</FONT>
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