Re: [Starpu-devel] starpu_data_unregister() failing at pthread_spin_unlock()

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

Hello,

Jonathan Adamczewski, le Sat 16 Apr 2011 09:44:49 +0200, a écrit :
>         clSetKernelArg(kernel, i, STARPU_VARIABLE_GET_ELEMSIZE(buffer[i]),
>                               &STARPU_VARIABLE_GET_PTR(buffer[i]));

Err, this should be

         clSetKernelArg(kernel, i, sizeof(cl_mem),
                               &STARPU_VARIABLE_GET_PTR(buffer[i]));

as what clSetKernelArg expects is not the size of the buffer, but the
size of the pointer. You need to pass

         STARPU_VARIABLE_GET_ELEMSIZE(buffer[i]),

separately as another kernel parameter.

> Unregistering the second variable causes an assert to fail in 
> _starpu_spin_unlock() - the assert checking the return value of 
> pthread_spin_unlock() fails. According to gdb, lock->lock contains the 
> value 
> 0xfeeefeee, which looks rather suspicious.

Indeed. I guess valgrind is not of much help here.

Samuel