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This patch adds support for allocating low-latency ".shared" memory on NVPTX GPU device, via the omp_low_lat_mem_space and omp_alloc. The memory can be allocated, reallocated, and freed using a basic but fast algorithm, is thread safe and the size of the low-latency heap can be configured using the GOMP_NVPTX_LOWLAT_POOL environment variable. The use of the PTX dynamic_smem_size feature means that low-latency allocator will not work with the PTX 3.1 multilib. For now, the omp_low_lat_mem_alloc allocator also works, but that will change when I implement the access traits. libgomp/ChangeLog: * allocator.c (MEMSPACE_ALLOC): New macro. (MEMSPACE_CALLOC): New macro. (MEMSPACE_REALLOC): New macro. (MEMSPACE_FREE): New macro. (predefined_alloc_mapping): New array. Add _Static_assert to match. (ARRAY_SIZE): New macro. (omp_aligned_alloc): Use MEMSPACE_ALLOC. Implement fall-backs for predefined allocators. Simplify existing fall-backs. (omp_free): Use MEMSPACE_FREE. (omp_calloc): Use MEMSPACE_CALLOC. Implement fall-backs for predefined allocators. Simplify existing fall-backs. (omp_realloc): Use MEMSPACE_REALLOC, MEMSPACE_ALLOC, and MEMSPACE_FREE. Implement fall-backs for predefined allocators. Simplify existing fall-backs. * config/nvptx/team.c (__nvptx_lowlat_pool): New asm variable. (__nvptx_lowlat_init): New prototype. (gomp_nvptx_main): Call __nvptx_lowlat_init. * libgomp.texi: Update memory space table. * plugin/plugin-nvptx.c (lowlat_pool_size): New variable. (GOMP_OFFLOAD_init_device): Read the GOMP_NVPTX_LOWLAT_POOL envvar. (GOMP_OFFLOAD_run): Apply lowlat_pool_size. * basic-allocator.c: New file. * config/nvptx/allocator.c: New file. * testsuite/libgomp.c/omp_alloc-1.c: New test. * testsuite/libgomp.c/omp_alloc-2.c: New test. * testsuite/libgomp.c/omp_alloc-3.c: New test. * testsuite/libgomp.c/omp_alloc-4.c: New test. * testsuite/libgomp.c/omp_alloc-5.c: New test. * testsuite/libgomp.c/omp_alloc-6.c: New test. Co-authored-by: Kwok Cheung Yeung <kcy@codesourcery.com> Co-Authored-By: Thomas Schwinge <thomas@codesourcery.com> |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
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| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
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| ltmain.sh | ||
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| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| SECURITY.txt | ||
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| test-driver | ||
| ylwrap | ||
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