Git hash used in performance results below: https://github.com/intel/llvm/commit/d81081f70085de828d2ff8acdd3e62621af5d00c
A more recent Git hash that works: https://github.com/intel/llvm/commit/cece649de57dbd5dc7052d6e45ca3bd47fd0913b
Run build.sh in this directory to obtain the DPC++ compiler for the CUDA back-end.
You need CMake 3.14+ and Ninja (ninja-build) to compile LLVM (i.e. DPC++). Please install these yourself.
| Block size | CUDA Rate (MF/s) | SYCL Rate (MF/s) | CUDA Avg time (s) | SYCL Avg time (s) |
|---|---|---|---|---|
| 1 | 23745.6 | 46322.8 | 0.0941447 | 0.0482597 |
| 2 | 94231.9 | 165960 | 0.0237236 | 0.0134702 |
| 4 | 347783 | 486228 | 0.00642793 | 0.00459768 |
| 8 | 425630 | 1.00311e+06 | 0.00525227 | 0.0022286 |
| 16 | 245849 | 1.0703e+06 | 0.00909305 | 0.00208868 |
| 32 | 223730 | 1.06991e+06 | 0.00999204 | 0.00208946 |
jhammond@thetagpu13:~/PRK/Cxx11/sandbox$ for t in 1 2 4 8 16 32 ; do ./stencil-cuda 100 8000 $t star 4 ; done
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 1
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 23745.6 Avg time (s): 0.0941447
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 2
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 94231.9 Avg time (s): 0.0237236
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 4
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 347783 Avg time (s): 0.00642793
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 8
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 425630 Avg time (s): 0.00525227
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 16
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 245849 Avg time (s): 0.00909305
Parallel Research Kernels version
C++11/CUDA Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Tile size = 32
Type of stencil = star
Radius of stencil = 4
Solution validates
Rate (MFlops/s): 223730 Avg time (s): 0.00999204
jhammond@thetagpu13:~/PRK/Cxx11/sandbox$ for t in 1 2 4 8 16 32 ; do ./stencil-sycl 100 8000 $t star 4 ; done
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 1
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 46322.8 Avg time (s): 0.0482597
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 2
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 165960 Avg time (s): 0.0134702
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 4
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 486228 Avg time (s): 0.00459768
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 8
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 1.00311e+06 Avg time (s): 0.0022286
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 16
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 1.0703e+06 Avg time (s): 0.00208868
Parallel Research Kernels version
C++11/SYCL Stencil execution on 2D grid
Number of iterations = 100
Grid size = 8000
Block size = 32
Type of stencil = star
Radius of stencil = 4
SYCL Device: A100-SXM4-40GB
SYCL Platform: NVIDIA CUDA BACKEND
Solution validates
64B Rate (MFlops/s): 1.06991e+06 Avg time (s): 0.00208946