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Add printf support #163

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@charleskawczynski
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This is my first pass at adding printf support. I'm still experimenting, but I may need help with this!

simonbyrne
simonbyrne reviewed Dec 21, 2020
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simonbyrne
simonbyrne reviewed Dec 22, 2020
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src/KernelAbstractions.jl Outdated
Comment on lines 549 to 551
# @sprintf($sfmt, $(args...))
@print(@sprintf($sfmt, $(args...)))
# @print("test")
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Suggested change
# @sprintf($sfmt, $(args...))
@print(@sprintf($sfmt, $(args...)))
# @print("test")
@printf($sfmt, $(args...))

?

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This results in a StackOverflowError

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Maybe it should be Base.@printf?

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Ah, yes. Needed Printf.@printf

@DilumAluthge
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Let's see if CI passes.

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bors bot added a commit that referenced this pull request Jan 6, 2021
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Try #163:
3784d67
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bors bot commented Jan 6, 2021

try

Build failed:

@DilumAluthge
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DilumAluthge commented Jan 6, 2021 •
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CI fails with: (link to CI log)

�[37mprint test: �[39m�[91m�[1mError During Test�[22m�[39m at �[39m�[1m/var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:35�[22m
  Got exception outside of a @test
  InvalidIRError: compiling kernel gpu_kernel_printf(Cassette.Context{nametype(CUDACtx),KernelAbstractions.CompilerMetadata{DynamicSize,DynamicCheck,Nothing,CartesianIndices{1,Tuple{Base.OneTo{Int64}}},NDRange{1,DynamicSize,StaticSize{(4,)},CartesianIndices{1,Tuple{Base.OneTo{Int64}}},Nothing}},Nothing,KernelAbstractions.var"##PassType#253",Nothing,Cassette.DisableHooks}, typeof(gpu_kernel_printf)) resulted in invalid LLVM IR
  Reason: unsupported dynamic function invocation (call to _cuprintf(::Val{fmt}, argspec...) where fmt in CUDA at /root/.julia/packages/CUDA/YeS8q/src/device/intrinsics/output.jl:38)
  Stacktrace:
   [1] overdub at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/src/backends/cuda.jl:327
   [2] macro expansion at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:21
   [3] gpu_kernel_printf at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/src/macros.jl:80
   [4] overdub at /root/.julia/packages/Cassette/158rp/src/overdub.jl:0
  Reason: unsupported dynamic function invocation (call to _cuprintf(::Val{fmt}, argspec...) where fmt in CUDA at /root/.julia/packages/CUDA/YeS8q/src/device/intrinsics/output.jl:38)
  Stacktrace:
   [1] overdub at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/src/backends/cuda.jl:327
   [2] macro expansion at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:22
   [3] gpu_kernel_printf at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/src/macros.jl:80
   [4] overdub at /root/.julia/packages/Cassette/158rp/src/overdub.jl:0
  Stacktrace:
   [1] check_ir(::GPUCompiler.CompilerJob{GPUCompiler.PTXCompilerTarget,CUDA.CUDACompilerParams}, ::LLVM.Module) at /root/.julia/packages/GPUCompiler/uTpNx/src/validation.jl:123
   [2] macro expansion at /root/.julia/packages/GPUCompiler/uTpNx/src/driver.jl:239 [inlined]
   [3] macro expansion at /root/.julia/packages/TimerOutputs/ZmKD7/src/TimerOutput.jl:206 [inlined]
   [4] codegen(::Symbol, ::GPUCompiler.CompilerJob; libraries::Bool, deferred_codegen::Bool, optimize::Bool, strip::Bool, validate::Bool, only_entry::Bool) at /root/.julia/packages/GPUCompiler/uTpNx/src/driver.jl:237
   [5] compile(::Symbol, ::GPUCompiler.CompilerJob; libraries::Bool, deferred_codegen::Bool, optimize::Bool, strip::Bool, validate::Bool, only_entry::Bool) at /root/.julia/packages/GPUCompiler/uTpNx/src/driver.jl:39
   [6] compile at /root/.julia/packages/GPUCompiler/uTpNx/src/driver.jl:35 [inlined]
   [7] cufunction_compile(::GPUCompiler.FunctionSpec; kwargs::Base.Iterators.Pairs{Symbol,Int64,Tuple{Symbol},NamedTuple{(:maxthreads,),Tuple{Int64}}}) at /root/.julia/packages/CUDA/YeS8q/src/compiler/execution.jl:310
   [8] check_cache(::Dict{UInt64,Any}, ::Any, ::Any, ::GPUCompiler.FunctionSpec{typeof(Cassette.overdub),Tuple{Cassette.Context{nametype(CUDACtx),KernelAbstractions.CompilerMetadata{DynamicSize,DynamicCheck,Nothing,CartesianIndices{1,Tuple{Base.OneTo{Int64}}},NDRange{1,DynamicSize,StaticSize{(4,)},CartesianIndices{1,Tuple{Base.OneTo{Int64}}},Nothing}},Nothing,KernelAbstractions.var"##PassType#253",Nothing,Cassette.DisableHooks},typeof(gpu_kernel_printf)}}, ::UInt64; kwargs::Base.Iterators.Pairs{Symbol,Int64,Tuple{Symbol},NamedTuple{(:maxthreads,),Tuple{Int64}}}) at /root/.julia/packages/GPUCompiler/uTpNx/src/cache.jl:40
   [9] gpu_kernel_printf at ./none:0 [inlined]
   [10] cufunction(::typeof(Cassette.overdub), ::Type{Tuple{Cassette.Context{nametype(CUDACtx),KernelAbstractions.CompilerMetadata{DynamicSize,DynamicCheck,Nothing,CartesianIndices{1,Tuple{Base.OneTo{Int64}}},NDRange{1,DynamicSize,StaticSize{(4,)},CartesianIndices{1,Tuple{Base.OneTo{Int64}}},Nothing}},Nothing,KernelAbstractions.var"##PassType#253",Nothing,Cassette.DisableHooks},typeof(gpu_kernel_printf)}}; name::String, kwargs::Base.Iterators.Pairs{Symbol,Int64,Tuple{Symbol},NamedTuple{(:maxthreads,),Tuple{Int64}}}) at /root/.julia/packages/CUDA/YeS8q/src/compiler/execution.jl:297
   [11] macro expansion at /root/.julia/packages/CUDA/YeS8q/src/compiler/execution.jl:109 [inlined]
   [12] (::KernelAbstractions.Kernel{CUDADevice,StaticSize{(4,)},DynamicSize,typeof(gpu_kernel_printf)})(; ndrange::Tuple{Int64}, dependencies::Nothing, workgroupsize::Nothing, progress::Function) at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/src/backends/cuda.jl:187
   [13] test_printf(::CUDADevice) at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:32
   [14] top-level scope at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:45
   [15] top-level scope at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.5/Test/src/Test.jl:1115
   [16] top-level scope at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/print_test.jl:36
   [17] include(::String) at ./client.jl:457
   [18] top-level scope at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/runtests.jl:33
   [19] top-level scope at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.5/Test/src/Test.jl:1115
   [20] top-level scope at /var/lib/buildkite-agent/builds/rtx2070-gpuci1-julia-csail-mit-edu/julialang/kernelabstractions-dot-jl/test/runtests.jl:33
   [21] include(::String) at ./client.jl:457
   [22] top-level scope at none:6
   [23] eval(::Module, ::Any) at ./boot.jl:331
   [24] exec_options(::Base.JLOptions) at ./client.jl:272
   [25] _start() at ./client.jl:506

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@charleskawczynski @DilumAluthge @simonbyrne