[SATLUG] Re: Parallell Processing
swinston at trinity.edu
Wed Aug 28 12:52:01 CDT 2002
That depends on a lot of stuff. If you're talking about using regular
sequential programs in a multi-processing cluster. Then you're looking at a
system that must handle breaking up processes, send them to proper nodes,
have those nodes handle them (memory could be shared a number of ways),
without being told about the system it's being run on. This means that it
usually adds a lot of overhead to your programs. The absolute best solution
is to use programs written specifically for concurrency or parallel
Reason for this is that these programs are written to handle the above
situations in a manner that delegates less overhead. Remember when you're
talking about this stuff, there's always a trade off. It is possible to see
perfect parallelism with distributed computing on a cluster (that's where you
add up all your processers, and see the same results from your programs
execution as what it would be on a sequential machine with the power of all
processors together). However, it's also possible to slow it down to slower
than normal sequentialism.
On Wednesday 28 August 2002 11:09, Andrew C . Benson wrote:
> I was under the assumption the system would delegate certain processes to
> certain machines (based on utilization or something). And I believed that
> any process could be used, but only those built with multithreading in mind
> (pth, kth) would take special advantage of this.
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