[Beignet] Beignet not working on Dell Precision M3800

[Yichao Yu]

On Tue, May 20, 2014 at 12:12 AM, Yichao Yu <yyc1992 at gmail.com> wrote:
>> [Rong]: Screen frozen may be GPU hang, can you provide your tests or kernel, then I will reproduce and fix it.

And it seems that it has nothing to do with kernels - - ...

>
> There seems to be multiple ones but at least here is one of them:
>
> I was using the pyopencl[1] test cases[2] (cuz I am developing the
> cffi version for pypy) and the two test cases that are failing in
> `test_wrapper.py` are `test_image_3d`[4] and `test_copy_buffer`[5].
> The 3d image test fail with invalid image format error (is 3d image
> not supported) and the copy buffer test hang the GPU without doint
> anything (the returned buffer is empty).
>
> I have created a c version for you to reproduce here[6], in which you
> can modify the `BUF_SIZE`. On my computer, it fails for all the
> numbers I have tried from 1 to 50000 so it shouldn't be the problem of
> too big data transfer (and .... in any cases copying 50000 numbers
> shouldn't take seconds :P). I haven't played with the flag for
> creating buffers but at least the current flags have 100%
> reproducibility here ....
>
> [1] https://github.com/pyopencl/pyopencl/
> [2] https://github.com/pyopencl/pyopencl/tree/master/test
> [3] https://github.com/pyopencl/pyopencl/blob/master/test/test_wrapper.py
> [4] https://github.com/pyopencl/pyopencl/blob/master/test/test_wrapper.py#L396
> [5] https://github.com/pyopencl/pyopencl/blob/master/test/test_wrapper.py#L471
> [6] https://gist.github.com/yuyichao/242fd2a812088930af91
>
>>
>> [Rong]: Yes, must hack the kernel to walk around it now, and the drm driver team is handling it now, but maybe need some time.
>
> Good to know at least someone are working on it.
>
>>
>>
>> Looking forward to full support soon.
>>
>> Yichao Yu
>>
>>>
>>> Thanks
>>>
>>