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Re: A question of multi-thread on darwin.

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Re: A question of multi-thread on darwin.

Subject: Re: A question of multi-thread on darwin.
From: Greg Parker <email@hidden>
Date: Tue, 12 Jun 2007 12:19:43 -0700


Calvin Liu wrote:

Recently I read a book saying that "Windows and Macintosh implementations of Java follow a time slicing approach. Solaris and other Unix implementations follow a preemptive scheduling approach." So I have some questions:

Your book is old. Mac OS X uses preemptive scheduling for Java threads and all other threads. (Mac OS Classic did use a time-slice scheduler.)

1. Does it mean changing priority of a process won't change anything on Windows/Mac because of the time slicing approach? 2. And if it happens on all BSD-based OS? 3. Where can I find details for this topic?

In general, process priority should affect Java the same way as non- Java code. Other BSD-based systems may differ, but I expect they all use preemptive threads for Java and non-Java. email@hidden will know more about Mac OS X's Java implementation.


--
Greg Parker     email@hidden     Runtime Wrangler


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