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Multithreaded array initialization #68

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Multithreaded array initialization #68

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ca855db
first try
carstenbauer Oct 4, 2022
da12413
kinda works
carstenbauer Oct 4, 2022
04c2b11
works
carstenbauer Oct 4, 2022
0234451
undo
carstenbauer Oct 4, 2022
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14 changes: 11 additions & 3 deletions src/ParallelKernel/allocators.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -43,23 +43,31 @@ macro rand_threads(args...) check_initialized(); esc(_rand(args...; package=PKG
function _zeros(args...; package::Symbol=get_package())
numbertype = get_numbertype()
if (package == PKG_CUDA) return :(CUDA.zeros($numbertype, $(args...)))
elseif (package == PKG_THREADS) return :(Base.zeros($numbertype, $(args...)))
elseif (package == PKG_THREADS) return :(ParallelStencil.ParallelKernel._parallel_init(Base.zero, $numbertype, $(args...)))
else @KeywordArgumentError("$ERRMSG_UNSUPPORTED_PACKAGE (obtained: $package).")
end
end

function _ones(args...; package::Symbol=get_package())
numbertype = get_numbertype()
if (package == PKG_CUDA) return :(CUDA.ones($numbertype, $(args...)))
elseif (package == PKG_THREADS) return :(Base.ones($numbertype, $(args...)))
elseif (package == PKG_THREADS) return :(ParallelStencil.ParallelKernel._parallel_init(Base.one, $numbertype, $(args...)))
else @KeywordArgumentError("$ERRMSG_UNSUPPORTED_PACKAGE (obtained: $package).")
end
end

function _rand(args...; package::Symbol=get_package())
numbertype = get_numbertype()
if (package == PKG_CUDA) return :(CUDA.CuArray(rand($numbertype, $(args...))))
elseif (package == PKG_THREADS) return :(Base.rand($numbertype, $(args...)))
elseif (package == PKG_THREADS) return :(ParallelStencil.ParallelKernel._parallel_init(Base.rand, $numbertype, $(args...)))
else @KeywordArgumentError("$ERRMSG_UNSUPPORTED_PACKAGE (obtained: $package).")
end
end

function _parallel_init(f::F, numbertype::Type{T}, args...) where {F, T}
arr = Array{numbertype, length(args)}(undef, args...)
Threads.@threads :static for i in eachindex(arr)
@inbounds arr[i] = f(T)
end
return arr
end