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| author | Alexey Bataev <a.bataev@hotmail.com> | 2019-04-26 19:30:34 +0000 |
|---|---|---|
| committer | Alexey Bataev <a.bataev@hotmail.com> | 2019-04-26 19:30:34 +0000 |
| commit | 867a57389a1512800a2b2bdff6967f0978d398d6 (patch) | |
| tree | f0cf09e44d2bbe8662498803026995d59754f5c9 /libomptarget/deviceRTLs/nvptx/src/libcall.cu | |
| parent | 777f60f39b80b52f0b3ce3f2aa1af5ffb7aaf7bc (diff) | |
[OPENMP][NVPTX]Correctly handle L2 parallelism in SPMD mode.
Summary:
The parallelLevel counter must be on per-thread basis to fully support
L2+ parallelism, otherwise we may end up with undefined behavior.
Introduce the parallelLevel on per-warp basis using shared memory. It
allows to avoid the problems with the synchronization and allows fully
support L2+ parallelism in SPMD mode with no runtime.
Reviewers: gtbercea, grokos
Subscribers: guansong, jdoerfert, caomhin, kkwli0, openmp-commits
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D60918
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@359341 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'libomptarget/deviceRTLs/nvptx/src/libcall.cu')
| -rw-r--r-- | libomptarget/deviceRTLs/nvptx/src/libcall.cu | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libomptarget/deviceRTLs/nvptx/src/libcall.cu b/libomptarget/deviceRTLs/nvptx/src/libcall.cu index 9bc3f2c..c3877a8 100644 --- a/libomptarget/deviceRTLs/nvptx/src/libcall.cu +++ b/libomptarget/deviceRTLs/nvptx/src/libcall.cu @@ -165,7 +165,7 @@ EXTERN int omp_get_level(void) { ASSERT0(LT_FUSSY, isSPMDMode(), "Expected SPMD mode only with uninitialized runtime."); // parallelLevel starts from 0, need to add 1 for correct level. - return parallelLevel + 1; + return parallelLevel[GetWarpId()] + 1; } int level = 0; omptarget_nvptx_TaskDescr *currTaskDescr = |