Re: real-time Java

[Samuel Tardieu <sam@rfc1149.net>]

>>>>> "Wes" == Wesley Groleau <wesgroleau@despammed.com> writes:

>> Unix and Windows will load only one copy of a binary no matter if
>> it's an executable or shared library. So there is only one copy of
>> the garbage collector code. I don't see how collector data could be
>> shared though.

Wes> I can't speak for windows, but this is not true of Solaris.  The
Wes> project I recently left had a problem reporting/tracking tool in
Wes> Java.  Everybody used it.  That mean that at any given time, the
Wes> physical memory and swap space had twenty to thirty copies of the
Wes> JVM running, and each copy had additional memory allocated to all
Wes> the same classes.

"All the same classes" are data. Wojtek was talking about the virtual
machine itself (including the garbage collector), not about all the
loaded classes. Fortunately, only read-only pages are shared, not data :-)

  Sam
-- 
Samuel Tardieu -- sam@rfc1149.net -- http://www.rfc1149.net/sam