threads demystified

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Andersen - 11 Feb 2005 17:43 GMT

How many threads can one application have at the same time in Java? Is
there a roof? Is it platform dependent, in that case, what is the number
for SUN's JVM on WIN32? Any info on this would help me.

What about green threads? they are out?

regards,
Andersen

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Sachin - 11 Feb 2005 20:01 GMT

Hi Andersen,

Not sure if the following thread helps ...

http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thre
ad/ba0b73e49874fd3a/318178780f039744?q=Max+Java+Threads&_done=%2Fgroups%3Fhl%3De
n%26q%3DMax+Java+Threads%26qt_s%3DSearch+Groups%26&_doneTitle=Back+to+Search&&d#
318178780f039744

-Sachin

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Andersen - 13 Feb 2005 02:00 GMT

One question, are java threads mapped to OS threads, or are they all
running within one single OS thread?

regards,
Andersen

> Hi Andersen,
>
[quoted text clipped - 3 lines]
>
> -Sachin

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Bill Tschumy - 13 Feb 2005 02:29 GMT

> One question, are java threads mapped to OS threads, or are they all
> running within one single OS thread?
[quoted text clipped - 12 lines]
>>
>> -Sachin

It is up to the implementation to decide since it is not spelled out in the
specification. On most platforms (Mac OS X, Windows, Linux) they are mapped
to OS-level threads. Early in Java's history, on Solaris they were not. The
Solaris JVM used green threads to implement the Java threading model. Not
sure if they still do that or not.

Signature

Bill Tschumy
Otherwise -- Austin, TX
http://www.otherwise.com

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Cindi - 13 Feb 2005 03:50 GMT

http://blogs.ittoolbox.com/eai/leadership/archives/003046.asp

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