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Subject: Re: [boost] different matrix library?
From: DE (satan66613_at_[hidden])
Date: 2009-08-12 03:36:51

to say about threading

on 11.08.2009 at 22:21
 joel wrote :
> We also target multicore using openMP (rather trivial) and are starting
> GPUs this year with a new post-doctoral grant.
> SO I hope to get everythign working together to get some compelte,
> be-all end-all matrix library out of that.

i tried to parallelize some operations using openmp but got
significant speedup only for matrix-vector and matrix-matrix
so i came to a thought that multithreading for linalg operations of
moderate sizes is even harmful
rather threading must be done at higher levels
e.g. when monte-carlo simulating it is trivial to compute subsequent
realizations in several threads -> minimum sinchronization, minimum
complexity, maximum speedup
so the question is: is threading for such lib needed as air?


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