pw_gpu Module Reference

Functions/Subroutines
subroutine, public	pw_gpu_init ()
	Allocates resources on the gpu device for gpu fft acceleration. More...
subroutine, public	pw_gpu_finalize ()
	Releases resources on the gpu device for gpu fft acceleration. More...
subroutine, public	pw_gpu_r3dc1d_3d (pw1, pw2, scale)
	perform an fft followed by a gather on the gpu More...
subroutine, public	pw_gpu_c1dr3d_3d (pw1, pw2, scale)
	perform an scatter followed by a fft on the gpu More...
subroutine, public	pw_gpu_r3dc1d_3d_ps (pw1, pw2, scale)
	perform an parallel fft followed by a gather on the gpu More...
subroutine, public	pw_gpu_c1dr3d_3d_ps (pw1, pw2, scale)
	perform an parallel scatter followed by a fft on the gpu More...

Detailed Description

Note

This module contains routines necessary to operate on plane waves on GPUs

History

BGL (06-Mar-2008) : Created AG (18-May-2012) : Refacturing:

• added explicit interfaces to C routines
• enable double precision complex transformations AG (11-Sept-2012) : Modifications:

• use pointers if precision mapping is not required
• use OMP for mapping MT (Jan 2022) : Modifications
• use a generic interface for fft calls to GPUs
• Support both Nvidia and AMD GPUs. Other GPUs manufacturers can be added easily.

  Author

  Benjamin G. Levine

Function/Subroutine Documentation

pw_gpu_init()

subroutine, public pw_gpu::pw_gpu_init

Allocates resources on the gpu device for gpu fft acceleration.

Author

Ole Schuett

Definition at line 62 of file pw_gpu.F.

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pw_gpu_finalize()

subroutine, public pw_gpu::pw_gpu_finalize

Releases resources on the gpu device for gpu fft acceleration.

Author

Ole Schuett

Definition at line 81 of file pw_gpu.F.

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pw_gpu_r3dc1d_3d()

subroutine, public pw_gpu::pw_gpu_r3dc1d_3d	(	type(pw_r3d_rs_type), intent(in)	pw1,
		type(pw_c1d_gs_type), intent(inout)	pw2,
		real(kind=dp), intent(in)	scale
	)

perform an fft followed by a gather on the gpu

Parameters

pw1	...
pw2	...
scale	...

Author

Benjamin G Levine

Definition at line 103 of file pw_gpu.F.

pw_gpu_c1dr3d_3d()

subroutine, public pw_gpu::pw_gpu_c1dr3d_3d	(	type(pw_c1d_gs_type), intent(in)	pw1,
		type(pw_r3d_rs_type), intent(inout)	pw2,
		real(kind=dp), intent(in)	scale
	)

perform an scatter followed by a fft on the gpu

Parameters

pw1	...
pw2	...
scale	...

Author

Benjamin G Levine

Definition at line 161 of file pw_gpu.F.

pw_gpu_r3dc1d_3d_ps()

subroutine, public pw_gpu::pw_gpu_r3dc1d_3d_ps	(	type(pw_r3d_rs_type), intent(in)	pw1,
		type(pw_c1d_gs_type), intent(inout)	pw2,
		real(kind=dp), intent(in)	scale
	)

perform an parallel fft followed by a gather on the gpu

Parameters

pw1	...
pw2	...
scale	...

Author

Andreas Gloess

Definition at line 219 of file pw_gpu.F.

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pw_gpu_c1dr3d_3d_ps()

subroutine, public pw_gpu::pw_gpu_c1dr3d_3d_ps	(	type(pw_c1d_gs_type), intent(in)	pw1,
		type(pw_r3d_rs_type), intent(inout)	pw2,
		real(kind=dp), intent(in)	scale
	)

perform an parallel scatter followed by a fft on the gpu

Parameters

pw1	...
pw2	...
scale	...

Author

Andreas Gloess

Definition at line 391 of file pw_gpu.F.

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