| 2d1451d4 | 09-Jan-2020 |
Hong Zhang <hongzhang@anl.gov> |
Initial commit for porting SELL to GPU
- Add tiled SPMV and basic SpMVfor SeqSELL
- Tested in serial
- Offloadmask is used to determine when the matrix should be copied to GPU
- Use different slice
Initial commit for porting SELL to GPU
- Add tiled SPMV and basic SpMVfor SeqSELL
- Tested in serial
- Offloadmask is used to determine when the matrix should be copied to GPU
- Use different slice height for CUDA version
- By checking the nonzerostate, PETSc can decide if the whole matrix need to be copied or just the values need to be copied
- Make the convert function public so that the very slow MatConvert_Basic can be avoided sometimes. E.g. one can use a two-step convert method: AIJ->SELL,SELL->SELLCUDA instead of the direct convert AIJ->SELLCUDA
- Make the FLOPS count for SELL same as that for AIJCUSPARSE.
- MatDisAssemble is not needed.
- Change slice height from 32 to 16 for GPU
- To overlap communication with MatMult, VecScatterBegin() should be called before MatMult() for the diagonal part.
- SLICE_HEIGHT is defined to be 32 to match the warp size of GPU. For other cases, it is still 8.
Funded-by:
Project: PETSc for GPU
Time: 42 hours
Reported-by:
Thanks-to:
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| ae1eecf8 | 01-Apr-2023 |
Hong Zhang <hongzhang@anl.gov> |
Replace sprintf with snprintf to eliminate compiler warnings
/Users/petsc/builds/qaG_QyAe/1/petsc/petsc/src/mat/tests/cJSON.c:121:3: error: 'sprintf' is deprecated: This function is provided for com
Replace sprintf with snprintf to eliminate compiler warnings
/Users/petsc/builds/qaG_QyAe/1/petsc/petsc/src/mat/tests/cJSON.c:121:3: error: 'sprintf' is deprecated: This function is provided for compatibility reasons only. Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead. [-Werror,-Wdeprecated-declarations]
sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
^
Also fix compiler warning:
/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c: In function ‘print_string_ptr’:
/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:817:47: error: ‘%04x’ directive output truncated writing 4 bytes into a region of size 3 [-Werror=format-truncation=]
817 | snprintf((char *)output_pointer, 4, "u%04x", *input_pointer);
| ^~~~
/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:817:45: note: directive argument in the range [0, 255]
817 | snprintf((char *)output_pointer, 4, "u%04x", *input_pointer);
| ^~~~~~~
In file included from /usr/include/stdio.h:867,
from /scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:41:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output 6 bytes into a destination of size 4
67 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
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