Re: [Starpu-devel] DAG with Tag dependences

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

Duchateau, Alexandre, le Wed 27 Jun 2012 08:43:44 +0000, a écrit :
> From the new implemented graph, tags and tasks (not sure which is which)

Tags have no name, just a number, so the empty ellipses are the tags.

> appear as nodes of the same type with cyclical dependences.
> I basically have the graph I want with each node being a two node cycle 
> graph Task <-> Tag.
> 
> Is there no way to merge those two ? and have the DAG with task names in 
> the nodes (from task ?) and the dependences (from tags ?) ?

There is no easy way, because tags and tasks live before the relation
between the two is known, the FXT tool makes only one pass, and dot
doesn't seem to have a way to collapse two nodes.

Also, as it is now is more precise: there can be explicit dependencies
between tasks in addition to the tag dependencies, etc. We could however
add a two-passes script which does the collapse between tags and tasks
afterwards.

> Also, I now have a lot of messages at the end of my program's execution. 
> And what looks like the same messages fro starpu_fxt_tool:
> 94 warnings of the form
> profiling:/.../StarPU/src/.libs/libstarpu_1.0_la-footprint.gcda:Merge 
> mismatch for summaries

I am not getting them. Are you using some particular compilation tool ?

Samuel