Re: [ANNOUNCE] Native POSIX Thread Library 0.1

From: Hui (
Date: Sun Sep 22 2002 - 19:11:25 EST

On Sun, Sep 22, 2002 at 12:41:40PM -0600, Eric W. Biederman wrote:
> They are talking about an incremental GC routine so it does not need to stop
> all threads simultaneously. Threads only need to be stopped when the GC is gather
> a root set. This is what the safe points are for right? And it does
> not need to be 100% accurate in finding all of the garbage. The
> collector just needs to not make mistakes in the other direction.

There's a mixture of GC algorithms in HotSpot including generational and I
believe a traditional mark/sweep. GC isn't my expertise per se.

Think, you have a compiled code block and you suspend/interrupt threads when
you either start hitting the stack yellow guard or by a periodic GC thread...

That can happen anytime, so you can't just expect things to drop onto a
regular boundary in the compiled code block. It's for that reason that
you have to some kind of OS level threading support to get the ucontext.


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