[Haskell-cafe] Joels Time Leak

Tomasz Zielonka tomasz.zielonka at gmail.com
Fri Dec 30 01:14:04 EST 2005

On Thu, Dec 29, 2005 at 10:36:37PM +0100, Tomasz Zielonka wrote:
> On Thu, Dec 29, 2005 at 03:34:10PM -0500, Cale Gibbard wrote:
> > The issue with it taking too long seems to basically be as Joel said,
> > only one of the threads can take that MVar at a time. Even if the time
> > that it's taken is fairly short, if one is running faster than the
> > others, it tries to take the MVar more often, which means that it runs
> > a higher risk of being blocked and slowed down, letting other threads
> > take its place. It essentially just forces the scheduler to be more
> > fair.
> I get results that confirm scheduler unfairness.

I am taking it back. It seems that these results were caused by threads
starting at different moments. I made every thread wail till all threads
are created, and now I can't reproduce it anymore.

Best regards

I am searching for a programmer who is good at least in some of
[Haskell, ML, C++, Linux, FreeBSD, math] for work in Warsaw, Poland

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