[OpenACC] libgomp: cuMemHostGetDevicePointer error: invalid device

[Thomas Schwinge]

Hi!

On Mon, 12 Oct 2015 20:27:32 +0300, Νίκος Αντωνιάδης <annikos@gmail.com> wrote:
> I've downloaded and compiled the latest gcc: [...]

> using the instructions from 
> http://scelementary.com/2015/04/25/openacc-in-gcc.html
> in order to enable the OpenACC support in gcc.

Thanks for your interest!

> GPU: GeForce GTX 275

According to the table on <https://en.wikipedia.org/wiki/CUDA>, GeForce
GTX 275 supports Compute Capability 1.3, but GCC (in particular, the
nvptx backend) only supports 3.0 and higher.

> libgomp: cuMemHostGetDevicePointer error: invalid device

Not an ideal error message, I agree.

> I would like to mention that CUDA is working well on my machine.
> Is it a misconfiguration/miscompilation of myself while compiling gcc or 
> a bug in libgomp?

Missing support in GCC's nvptx backend, primarily.  And, that's unlikely
to be added, unless someone steps up to contribute/maintain such support.


Grüße
 Thomas
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 472 bytes
Desc: not available
URL: <https://gcc.gnu.org/pipermail/gcc-help/attachments/20151022/70b487a7/attachment.sig>