Skip Cave wrote:
> For example the function "parallel" could be used to place the function
> in the right argument into a specific processor, and then continue
> execution with the next statement in the script. So the script:
>
> parallel A
> parallel B
> parallel C
>
> Would result in the functions A, B, and C being run on separate threads,
> with each thread placed in a separate processor.
But what does that mean?
Let's say that we've got several arrays, and the functions A, B and C
correspond to the three blocks generated by:
var=: ([EMAIL PROTECTED] { ])bind'abcdefghijklmnopqrstuvwxyz'"0 bind i.
op=: ([EMAIL PROTECTED] { ])bind'+*%,-'"0 bind i.
exp=: var,.'=',.':',.var,.op,.var
exp"0(4 4 4)
What happens when the same variable is referenced in
multiple threads?
Random results and errors? Modify in place gets replaced
by a slower technique?
(Would it acceptable to make J substantially slower in contexts
where it's currently fast so that it can run multiple threads?)
--
Raul
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