Re: how to synchronise a subrange of all the threads

• Previous message: Marc Gonzalez-Sigler: "Re: Bleeding edge"
• In reply to: Venelin Mitov: "how to synchronise a subrange of all the threads"

Venelin Mitov wrote:

(snip)

> The problem is that t0..tn-1 is a subrange of 0..THREADS-1, so
> upc_barrier cannot be used.
> Can you propose me an effective solution (maybe something with
> upc_locks which works like "upc_barrier for threads t0..tn-1")?
> 

Unfortunately UPC does not have a built-in facility for synchronizing 
subsets of threads.  There are two solutions:
- If the algorithm is synchronous enough, you might be able to get by 
with upc_barrier.
- You can use the global memory to write the necessary synchronization 
primitives yourself.  I've got such a library written.  I can try to 
clean it up and send it to you if you like.

Parry

• Previous message: Marc Gonzalez-Sigler: "Re: Bleeding edge"
• In reply to: Venelin Mitov: "how to synchronise a subrange of all the threads"