Re: [ANNOUNCE] Native POSIX Thread Library 0.1

Bill Huey
2002-09-20T23:40:07Z

On Fri, Sep 20, 2002 at 02:50:29PM -0700, Bill Huey wrote:
> > how frequently does the GC thread run?
>
> Don't remember off hand, but it's like to be several times a second which is
> often enough to be a problem especially on large systems with high load.
>
> The JVM with incremental GC is being targetted for media oriented tasks
> using the new NIO, 3d library, etc... slowness in safepoints would cripple it
> for these tasks. It's a critical item and not easily address by the current
> 1:1 model.

Also throwing a signal to get the ucontext is pretty a expensive way of getting
it. But you folks know this already. Solaris threading has this via a some special
libraries. For large number of actively running threads, say, executing in a middle
of a method block it is potentially a huge problem for scalability.

Again, it's a critical issue from what I see of this.

bill