Hi
I'm trying to understand the behavior of the following code that uses a
SharedArray and a parallel for loop
a = SharedArray(Float64,10,10)
@parallel for i = 1:10
for j = 1:10
a[i,j] = i + j
end
end
sum(a)
As may be expected, the above code does not correctly compute sum(a) while
attaching an @sync before the @parallel does. However, if I the run the
following code,
a = SharedArray(Float64,10,10)
@parallel for i = 1:10
for j = 1:10
a[i,j] = i + j
end
end
a.*1
sum(a)
I do get the correct value for sum(a). I'm trying to understand the reason
for this. Maybe I'm misunderstanding something quite basic about the usage
of SharedArrays and the parallel for loop.
Thank you very much for your help
