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Summary:
[libomptarget][nfc] Update remaining uint32 to use lanemask_t
Update a few functions in the API to use lanemask_t instead of i32. NFC for
nvptx. Also update the ActiveThreads type in DataSharingStateTy.
This removes a lot of #ifdef from the downsteam amdgcn implementation.
Reviewers: ABataev, jdoerfert, grokos, ronlieb, RaviNarayanaswamy
Subscribers: openmp-commits
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D68513
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@373806 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
[libomptarget] Refactor activemask macro to inline function
See also abandoned D66846, split into this diff and others.
Reviewers: jdoerfert, ABataev, grokos, ronlieb, gregrodgers
Reviewed By: jdoerfert, ABataev
Subscribers: openmp-commits
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D66851
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@370781 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
[libomptarget] Refactor syncthreads macro to inline function
See also abandoned D66846, split into this diff and others.
Rev 2 of D66855
Reviewers: jdoerfert, ABataev, grokos, ronlieb, gregrodgers
Subscribers: openmp-commits
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D66861
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@370210 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Added function void __kmpc_syncwarp(int32_t) to expose it to the
compiler. It is required to fix the problem with the critical regions in
Cuda9.0+. We cannot use barrier in the critical region, but still need
to reconverge the threads in the warp after. This function allows to do
this.
Reviewers: grokos, jdoerfert
Subscribers: guansong, openmp-commits, kkwli0, caomhin
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D66672
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@369933 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
According to the OpenMP standard, barrier operation must perform
implicit flush operation. Currently, if there is only one thread in the
team, barrier does not flush the memory. Patch fixes this problem.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, jdoerfert, openmp-commits, caomhin
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D62398
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@367024 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
According to the OpenMP standard, flush makes a thread’s temporary view of memory consistent with memory and enforces an order on the memory operations of the variables explicitly specified or implied.
According to the Cuda toolkit documentation (https://docs.nvidia.com/cuda/archive/8.0/cuda-c-programming-guide/index.html#memory-fence-functions), __threadfence() functions provides required functionality.
__threadfence_system() also provides required functionality, but it also
includes some extra functionality, like synchronization of page-locked
host memory, synchronization for the host, etc. It is not required per
the standard and we can use more relaxed version of memory fence
operation.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, jfb, jdoerfert, openmp-commits, caomhin
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D62397
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@364572 91177308-0d34-0410-b5e6-96231b3b80d8
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This reverts commit r361421 to split the patch into 3 parts.
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@361638 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Parallel level counter should be volatile to prevent some dangerous
optimiations by the ptxas. Otherwise, ptxas optimizations lead to
undefined behaviour in some cases.
Also, use __threadfence() for #pragma omp flush and if the barrier
should not be used (we have only one thread in the team), still perform
flush operation since the standard requires implicit flush when
executing barriers.
Reviewers: gtbercea, kkwli0, grokos
Subscribers: guansong, jfb, jdoerfert, openmp-commits, caomhin
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D62199
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@361421 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Patch improves performance of the full runtime mode by moving
number-of-threads counter to the shared memory. It also allows to save
global memory.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, jfb, jdoerfert, openmp-commits, caomhin
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D61785
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@360457 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Previously for the different purposes we need to get the active/common
parallel level and with full runtime we iterated over all the records to
calculate this level. Instead, we can used the warp-based parallel level
counters used in no-runtime mode.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, jfb, jdoerfert, caomhin, openmp-commits
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D61395
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@359822 91177308-0d34-0410-b5e6-96231b3b80d8
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to reflect the new license. These used slightly different spellings that
defeated my regular expressions.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@351648 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Reduced number of the used register + improved performance propagating
the information about current execution/data sharing mode directly from
the compiler, where it is possible.
In some cases, it requires new/reworked interfaces of the runtime
external functions. Old functions are marked as deprecated.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, jfb, openmp-commits, caomhin
Differential Revision: https://reviews.llvm.org/D56278
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@350405 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
One of the LLVM optimizations, split critical edges, also clones tail
instructions. This is a dangerous operation for __syncthreads()
functions and this transformation leads to undefined behavior or
incorrect results. Patch fixes this problem by replacing __syncthreads()
function with the assembler instruction, which cost is too high and
wich cannot be copied.
Reviewers: grokos, gtbercea, kkwli0
Subscribers: guansong, openmp-commits, caomhin
Differential Revision: https://reviews.llvm.org/D56274
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@350333 91177308-0d34-0410-b5e6-96231b3b80d8
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function.
Summary:
Explicitly casted printf's args to the required types + simplified
shfl64 function.
Reviewers: gtbercea, kkwli0
Subscribers: guansong, jfb, caomhin, openmp-commits
Differential Revision: https://reviews.llvm.org/D55379
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@348521 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
According to the standard, after memory flushing the changes in the
memory must be visible to all the threads in all teams. Patch fixes
this.
Reviewers: gtbercea, kkwli0
Subscribers: guansong, jfb, caomhin, openmp-commits
Differential Revision: https://reviews.llvm.org/D55370
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@348491 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Reworked runtime to make it compatible with the requirements of the
original runtime library. Also, simplified some code to reduce number of
function calls.
Reviewers: gtbercea, kkwli0
Subscribers: guansong, jfb, caomhin, openmp-commits
Differential Revision: https://reviews.llvm.org/D55130
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@348003 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary: Refactor the checking for SPMD mode and whether the runtime is initialized or not. This uses constant flags which enables the runtime to optimize out unused sections of code that depend on these flags.
Reviewers: ABataev, caomhin
Reviewed By: ABataev
Subscribers: guansong, jfb, openmp-commits
Differential Revision: https://reviews.llvm.org/D54960
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@347698 91177308-0d34-0410-b5e6-96231b3b80d8
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Required to fix the buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@340956 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Implemented simple and lightweight runtime support for SPMD mode-based
constructs. It adds support for L2 sequential parallelism wihtout full
runtime support. Also, patch fixes some use cases for
uninitialized|lightweight runtime.
Reviewers: grokos, kkwli0, Hahnfeld, gtbercea
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D51222
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@340944 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
1. Fixed internal problem in `__kmpc_barrier` function: SPMD mode
synchronization function should be called only in L1 parallel level.
2. Removed some extra code for synchronization inside of the code, used
`__kmpc_barrier` instead.
3. Some code cleanup.
Reviewers: gtbercea, grokos
Subscribers: openmp-commits
Differential Revision: https://reviews.llvm.org/D49564
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@337691 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Patch fixes several problems in the implementation of NVPTX RTL.
1. Detection of the last iteration for loops with static scheduling, no chunks.
2. Fixes reductions for the serialized parallel constructs.
3. Fixes handling of the barriers.
Reviewers: grokos
Reviewed By: grokos
Subscribers: Hahnfeld, guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D48480
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@335469 91177308-0d34-0410-b5e6-96231b3b80d8
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device RTLs.
This patch implements the device runtime library whose interface is used in the code generation for OpenMP offloading devices.
Currently there is a single device RTL written in CUDA meant to CUDA enabled GPUs.
The interface is a variation of the kmpc interface that includes some extra calls to do thread and storage management that only make sense for a GPU target.
Differential revision: https://reviews.llvm.org/D14254
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@323649 91177308-0d34-0410-b5e6-96231b3b80d8
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