[Starpu-devel] Possible bug (scratch data + combined workers + version 1.3)

[Aleksandr Mikhalev <aleksandr.mikhalev@kaust.edu.sa>]

Dear StarPU team,

I think I discovered strange behaviour of StarPU 1.3, namely commits 
606c2184e434f38d11d9434a7b8281b5c1c3bd2a and 
629bfc1be63178246711d27e8f8c9c092a896713 (currently two latest commits in 1.3 
branch). I attached minimal example, that works in StarPU-1.2, but segfaults 
in StarPU-1.3. In order to repeat segfault one has to compile the code and 
run executable with “STARPU_SCHED=peager” to enable combined workers. Seems 
like “STARPU_SCRATCH” data handler property is the killer in the 1.3 case. At 
least, it is the point of segfault.

I am afraid I am missing some additional code to make example work stable in 
both versions (1.2 and 1.3), so I am asking for your assistance.

Best regards,
Aleksandr.


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