Subject: Re: PMC strawman
To: Matt Thomas <firstname.lastname@example.org>
From: Allen Briggs <email@example.com>
Date: 02/14/2003 23:44:11
On Fri, Feb 14, 2003 at 07:42:44PM -0800, Matt Thomas wrote:
> There would be a bit to note whether that blob has info. I'd
> make the blob explicitly opaque to userspace.
Hmm... Will that work with libpthread? If you're doing a voluntary
thread switch, the kernel's not really involved in setting or restoring
the context. Well, it is involved in restoring the context if you're
switching to a thread that was preempted. Unless I'm missing something.
> Of course it would conditional. I'd also prefer to have
> separate contents for interrupt / non-interrupt code.
That would be nice.
> Right now the pmc counters are per proc, not lwp, which needs to be
> fixed. I was thinking about creating a pmc context that a process
> could establish and share among it's children (or all of its threads).
> Make it refcnt'ed and on last reference, free it.
I like the idea. How would you un/bind threads/procs from/to it?
Allen Briggs firstname.lastname@example.org
Wasabi Systems, Inc. http://www.wasabisystems.com/