[Pharo-project] leaking semaphores

Guido Stepken gstepken at googlemail.com
Thu Mar 1 04:03:28 EST 2012

As long as GC, recompile, (see blocked UI during updates), ffi database
drivers completely block Smalltalk execution or do not access external
databases smoothly in parallel (also see async I/O, MP) i see only one
laugh here - that's indeed you!

Have fun!

Guido Stepken
Am 01.03.2012 09:43 schrieb "Henrik Johansen" <henrik.s.johansen at veloxit.no

> On Mar 1, 2012, at 8:38 AM, Guido Stepken wrote:
> Sooner or later Pharo Smalltalkers will have to read into this paper:
> http://www.lemis.com/grog/SMPng/USENIX/paper.ascii
> Why? Pharo is a OS on top of another OS. The same principles apply here.
> Without considering these principles or algorithms (no more or as little
> semaphores as possible, replaced by wait_queues with adjustable
> priorities), Pharo will suffer those problems.
> tnx 4 understanding, Guido Stepken
> I could enumerate the ways you are off target in this context, but that
> would be wasting my time.
> thx 4 the laugh, Henry
> p.s. The paper itself is indeed quite good and worth reading :D
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