Bibek,
Will this do the distributed computation?
I will let you go through this exercise yourself. Here are a couple of
tips:
* You can use writeln(here) to see what locale you are executing on.
* You can consult the Chapel spec to see what dims() returns.
* You can use compilerWarning(typeToString(myVariable.type)) to see the
type of the variable 'myVariable'.
* As I mentioned, forall over a range does not go to other locales.
Separately, Chapel now has atomic variables, described in the Task
Parallelism and Synchronization chapter of the spec. You will likely get
better performance using atomics instead of locking/unlocking.
Regards,
Vass
On Sat, 3 May 2014, Bibek Ghimire wrote:
Thank you, Vass for the response.
ok so there is race condition, I agree.
for distributed computation
I actually do
var ad = A.domain.dims();
var bd = B.domain.dims();
var cd = C.domain.dims();
var (arow, acol) = ad;
var (brow, bcol) = bd;
var (crow, ccol) = cd;
var lock:sync bool;
forall i in arow do
forall j in bcol do
forall k in acol do
lock = true;
C(i,j) += A(i,k)*B(k,j);
var unlock = lock;
Will this do the distributed computation?
To avoid race condition I was planning to use sync variable.
...
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