gfortran: error: unrecognized argument in option '-mcmodel=medium'

[Lingadahally, Vishakha (2023)]

Dear GCC Team,

I'm running Ubuntu 22 on my Mac virtually and my gfortran version is 11.4.0. 
When I try to install a certain software package, I encounter the following 
error:

gfortran: error: unrecognized argument in option '-mcmodel=medium'
gfortran: note: valid arguments to '-mcmodel=' are: large small tiny

Is this due to attempting to run gfortran on arm64 architecture? Could you 
please let me know how I could resolve the issue?

Thank you

Warm regards,
Vishakha

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Re: [PATCH 1/5] OpenMP, NVPTX: memcpy[23]D bias correction

[Thomas Schwinge]

Hi Julian!

On 2023-09-06T02:34:30-0700, Julian Brown  wrote:
> This patch works around behaviour of the 2D and 3D memcpy operations in
> the CUDA driver runtime.  Particularly in Fortran, the "base pointer"
> of an array (used for either source or destination of a host/device copy)
> may lie outside of data that is actually stored on the device.  The fix
> is to make sure that we use the first element of data to be transferred
> instead, and adjust parameters accordingly.

Do you (a) have a stand-alone test case for this (that is, not depending
on your other pending patches, so that this could go in directly --
together with the before-FAIL test case).  Do you (b) know if is this a
bug in our use of the CUDA Driver API or rather in CUDA itself?  If the
latter, have you reported this to Nvidia?

(I didn't quickly understand

"cuMemcpy2D" etc.)


Grüße
 Thomas


> 2023-09-05  Julian Brown  
>
> libgomp/
>   * plugin/plugin-nvptx.c (GOMP_OFFLOAD_memcpy2d): Adjust parameters to
>   avoid out-of-bounds array checks in CUDA runtime.
>   (GOMP_OFFLOAD_memcpy3d): Likewise.
> ---
>  libgomp/plugin/plugin-nvptx.c | 67 +++
>  1 file changed, 67 insertions(+)
>
> diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
> index 00d4241ae02b..cefe288a8aab 100644
> --- a/libgomp/plugin/plugin-nvptx.c
> +++ b/libgomp/plugin/plugin-nvptx.c
> @@ -1827,6 +1827,35 @@ GOMP_OFFLOAD_memcpy2d (int dst_ord, int src_ord, 
> size_t dim1_size,
>data.srcXInBytes = src_offset1_size;
>data.srcY = src_offset0_len;
>
> +  if (data.srcXInBytes != 0 || data.srcY != 0)
> +{
> +  /* Adjust origin to the actual array data, else the CUDA 2D memory
> +  copy API calls below may fail to validate source/dest pointers
> +  correctly (especially for Fortran where the "virtual origin" of an
> +  array is often outside the stored data).  */
> +  if (src_ord == -1)
> + data.srcHost = (const void *) ((const char *) data.srcHost
> +   + data.srcY * data.srcPitch
> +   + data.srcXInBytes);
> +  else
> + data.srcDevice += data.srcY * data.srcPitch + data.srcXInBytes;
> +  data.srcXInBytes = 0;
> +  data.srcY = 0;
> +}
> +
> +  if (data.dstXInBytes != 0 || data.dstY != 0)
> +{
> +  /* As above.  */
> +  if (dst_ord == -1)
> + data.dstHost = (void *) ((char *) data.dstHost
> +  + data.dstY * data.dstPitch
> +  + data.dstXInBytes);
> +  else
> + data.dstDevice += data.dstY * data.dstPitch + data.dstXInBytes;
> +  data.dstXInBytes = 0;
> +  data.dstY = 0;
> +}
> +
>CUresult res = CUDA_CALL_NOCHECK (cuMemcpy2D, &data);
>if (res == CUDA_ERROR_INVALID_VALUE)
>  /* If pitch > CU_DEVICE_ATTRIBUTE_MAX_PITCH or for device-to-device
> @@ -1895,6 +1924,44 @@ GOMP_OFFLOAD_memcpy3d (int dst_ord, int src_ord, 
> size_t dim2_size,
>data.srcY = src_offset1_len;
>data.srcZ = src_offset0_len;
>
> +  if (data.srcXInBytes != 0 || data.srcY != 0 || data.srcZ != 0)
> +{
> +  /* Adjust origin to the actual array data, else the CUDA 3D memory
> +  copy API call below may fail to validate source/dest pointers
> +  correctly (especially for Fortran where the "virtual origin" of an
> +  array is often outside the stored data).  */
> +  if (src_ord == -1)
> + data.srcHost
> +   = (const void *) ((const char *) data.srcHost
> + + (data.srcZ * data.srcHeight + data.srcY)
> +   * data.srcPitch
> + + data.srcXInBytes);
> +  else
> + data.srcDevice
> +   += (data.srcZ * data.srcHeight + data.srcY) * data.srcPitch
> +  + data.srcXInBytes;
> +  data.srcXInBytes = 0;
> +  data.srcY = 0;
> +  data.srcZ = 0;
> +}
> +
> +  if (data.dstXInBytes != 0 || data.dstY != 0 || data.dstZ != 0)
> +{
> +  /* As above.  */
> +  if (dst_ord == -1)
> + data.dstHost = (void *) ((char *) data.dstHost
> +  + (data.dstZ * data.dstHeight + data.dstY)
> +* data.dstPitch
> +  + data.dstXInBytes);
> +  else
> + data.dstDevice
> +   += (data.dstZ * data.dstHeight + data.dstY) * data.dstPitch
> +  + data.dstXInBytes;
> +  data.dstXInBytes = 0;
> +  data.dstY = 0;
> +  data.dstZ = 0;
> +}
> +
>CUDA_CALL (cuMemcpy3D, &data);
>return true;
>  }
> --
> 2.41.0
-
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Re: gfortran: error: unrecognized argument in option '-mcmodel=medium'

[Richard Biener via Fortran]

On Tue, Sep 26, 2023 at 4:44 PM Lingadahally, Vishakha (2023)
 wrote:
>
> Dear GCC Team,
>
> I'm running Ubuntu 22 on my Mac virtually and my gfortran version is 11.4.0. 
> When I try to install a certain software package, I encounter the following 
> error:
>
> gfortran: error: unrecognized argument in option '-mcmodel=medium'
> gfortran: note: valid arguments to '-mcmodel=' are: large small tiny
>
> Is this due to attempting to run gfortran on arm64 architecture? Could you 
> please let me know how I could resolve the issue?

You have to turn to Ubuntu here, -mcmodel=medium is certainly
supported in GCC 11, maybe Ubuntu patches out
the support?

>
> Thank you
>
> Warm regards,
> Vishakha
>
> This email, its contents and any attachments are intended solely for the 
> addressee and may contain confidential information. In certain circumstances, 
> it may also be subject to legal privilege. Any unauthorised use, disclosure, 
> or copying is not permitted. If you have received this email in error, please 
> notify us and immediately and permanently delete it. Any views or opinions 
> expressed in personal emails are solely those of the author and do not 
> necessarily represent those of Royal Holloway, University of London. It is 
> your responsibility to ensure that this email and any attachments are virus 
> free.