Constructors on GPU?

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#309 2025年1月22日に作成コメント 0 件リアクション 0 件担当者 0 名 GitHub で見る

まだ誰も着手していません。

評価

難易度: 4/5
見積もり時間: 3〜5日
初心者へのやさしさ: 35/100

issue の種類: バグ
明瞭さ: 説明が足りない
活発さ: 停滞
技術スタック: julia
領域: hpc

調査の方向性

T.(x_gpu) で失敗を再現し、続いて FixedPointNumbers.jl:58 と fixed.jl:81 を調査してください。報告されたスタックトレースでは、ここに変換とエラーハンドリングが現れています。完了条件は、GPU ブロードキャスト変換が、サポートされていない文字列呼び出しや外部関数呼び出しを生成せずに成功することです。

索引モデルが issue の本文から書いたものです。

説明

I'm implementing an algorithm on GPU where Float32 isn't accurate enough but Float64 incurs a 64x runtime penalty I'd like to avoid. The Fixed type is appealing because I can get the accuracy I need with a 32-bit type, and I have good prior knowledge of the dynamic range. I thought I'd give it a try but immediately ran into problems. For example,

using CUDA
using FixedPointNumbers

x_cpu = Float32[1, 2 ,3]
x_gpu = cu(x_cpu)

T = Q24f7
T.(x_cpu)  # no problem
T.(x_gpu)  # fails

log output

warning: linking module flags 'Dwarf Version': IDs have conflicting values ('i32 4' from globals with 'i32 2' from start)
ERROR: LoadError: InvalidIRError: compiling MethodInstance for (::GPUArrays.var"#34#36")(::CUDA.CuKernelContext, ::CuDeviceVector{Q24f7, 1}, ::Base.Broadcast.Broadcasted{CUDA.CuArrayStyle{1, CUDA.DeviceMemory}, Tuple{Base.OneTo{Int64}}, CUDA.var"#1155#1156"{Q24f7}, Tuple{Base.Broadcast.Extruded{CuDeviceVector{Float32, 1}, Tuple{Bool}, Tuple{Int64}}}}, ::Int64) resulted in invalid LLVM IR
Reason: unsupported call to an external C function (call to jl_string_to_genericmemory)
Reason: unsupported call to an external C function (call to jl_genericmemory_to_string)
Reason: unsupported call to an external C function (call to ijl_pchar_to_string)
Reason: unsupported dynamic function invocation (call to !=)
Stacktrace:
 [1] show
   @ ./ryu/Ryu.jl:115
 [2] multiple call sites
   @ unknown:0
Reason: unsupported dynamic function invocation (call to writeshortest)
Stacktrace:
 [1] show
   @ ./ryu/Ryu.jl:116
 [2] multiple call sites
   @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
 [1] _string_n
   @ ./strings/string.jl:109
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] show
   @ ./ryu/Ryu.jl:114
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
 [1] unsafe_wrap
   @ ./strings/string.jl:119
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] show
   @ ./ryu/Ryu.jl:114
 [5] multiple call sites
   @ unknown:0
Reason: unsupported dynamic function invocation (call to nonnothingtype)
Stacktrace:
 [1] nonnothing_nonmissing_typeinfo
   @ ./show.jl:1244
 [2] show
   @ ./ryu/Ryu.jl:115
 [3] multiple call sites
   @ unknown:0
Reason: unsupported dynamic function invocation (call to nonmissingtype)
Stacktrace:
 [1] nonnothing_nonmissing_typeinfo
   @ ./show.jl:1244
 [2] show
   @ ./ryu/Ryu.jl:115
 [3] multiple call sites
   @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
 [1] _string_n
   @ ./strings/string.jl:109
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:467
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
 [1] unsafe_wrap
   @ ./strings/string.jl:119
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:467
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
 [1] _string_n
   @ ./strings/string.jl:109
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:471
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
 [1] unsafe_wrap
   @ ./strings/string.jl:119
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:471
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
 [1] _string_n
   @ ./strings/string.jl:109
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:476
 [5] multiple call sites
   @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
 [1] unsafe_wrap
   @ ./strings/string.jl:119
 [2] StringMemory
   @ ./iobuffer.jl:44
 [3] StringVector
   @ ./iobuffer.jl:45
 [4] take!
   @ ./iobuffer.jl:476
 [5] multiple call sites
   @ unknown:0
Reason: unsupported dynamic function invocation (call to print_to_string(xs...) @ Base strings/io.jl:137)
Stacktrace:
 [1] string
   @ ./strings/io.jl:189
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:322
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to a lazy-initialized function (call to jl_genericmemory_to_string)
Stacktrace:
 [1] String
   @ ./strings/string.jl:78
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:324
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to a lazy-initialized function (call to ijl_pchar_to_string)
Stacktrace:
 [1] String
   @ ./strings/string.jl:80
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:324
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to a lazy-initialized function (call to jl_genericmemory_to_string)
Stacktrace:
 [1] String
   @ ./strings/string.jl:78
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:325
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to a lazy-initialized function (call to ijl_pchar_to_string)
Stacktrace:
 [1] String
   @ ./strings/string.jl:80
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:325
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported dynamic function invocation (call to print_to_string(xs...) @ Base strings/io.jl:137)
Stacktrace:
 [1] string
   @ ./strings/io.jl:189
 [2] throw_converterror
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:326
 [3] _convert
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
 [4] FixedPoint
   @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
 [5] #1155
   @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
 [6] _broadcast_getindex_evalf
   @ ./broadcast.jl:673
 [7] _broadcast_getindex
   @ ./broadcast.jl:646
 [8] getindex
   @ ./broadcast.jl:605
 [9] #34
   @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
  [1] _string_n
    @ ./strings/string.jl:109
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] #IOBuffer#519
    @ ./iobuffer.jl:128
  [4] GenericIOBuffer
    @ ./iobuffer.jl:119
  [5] throw_converterror
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:323
  [6] _convert
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
  [7] FixedPoint
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
  [8] #1155
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
  [9] _broadcast_getindex_evalf
    @ ./broadcast.jl:673
 [10] _broadcast_getindex
    @ ./broadcast.jl:646
 [11] getindex
    @ ./broadcast.jl:605
 [12] #34
    @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
  [1] unsafe_wrap
    @ ./strings/string.jl:119
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] #IOBuffer#519
    @ ./iobuffer.jl:128
  [4] GenericIOBuffer
    @ ./iobuffer.jl:119
  [5] throw_converterror
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:323
  [6] _convert
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/fixed.jl:81
  [7] FixedPoint
    @ ~/.julia/packages/FixedPointNumbers/Dn4hv/src/FixedPointNumbers.jl:58
  [8] #1155
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:186
  [9] _broadcast_getindex_evalf
    @ ./broadcast.jl:673
 [10] _broadcast_getindex
    @ ./broadcast.jl:646
 [11] getindex
    @ ./broadcast.jl:605
 [12] #34
    @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:59
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
  [1] _string_n
    @ ./strings/string.jl:109
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] _similar_data
    @ ./iobuffer.jl:156
  [4] _resize!
    @ ./iobuffer.jl:317
  [5] ensureroom
    @ ./iobuffer.jl:401
  [6] unsafe_write
    @ ./iobuffer.jl:522
  [7] unsafe_write
    @ ./io.jl:452
  [8] unsafe_write
    @ ./io.jl:803
  [9] write
    @ ./io.jl:837
 [10] show
    @ ./ryu/Ryu.jl:118
 [11] multiple call sites
    @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
  [1] unsafe_wrap
    @ ./strings/string.jl:119
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] _similar_data
    @ ./iobuffer.jl:156
  [4] _resize!
    @ ./iobuffer.jl:317
  [5] ensureroom
    @ ./iobuffer.jl:401
  [6] unsafe_write
    @ ./iobuffer.jl:522
  [7] unsafe_write
    @ ./io.jl:452
  [8] unsafe_write
    @ ./io.jl:803
  [9] write
    @ ./io.jl:837
 [10] show
    @ ./ryu/Ryu.jl:118
 [11] multiple call sites
    @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
  [1] _string_n
    @ ./strings/string.jl:109
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] _similar_data
    @ ./iobuffer.jl:156
  [4] ensureroom_slowpath
    @ ./iobuffer.jl:371
  [5] ensureroom
    @ ./iobuffer.jl:396
  [6] unsafe_write
    @ ./iobuffer.jl:522
  [7] unsafe_write
    @ ./io.jl:452
  [8] unsafe_write
    @ ./io.jl:803
  [9] write
    @ ./io.jl:837
 [10] show
    @ ./ryu/Ryu.jl:118
 [11] multiple call sites
    @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
  [1] unsafe_wrap
    @ ./strings/string.jl:119
  [2] StringMemory
    @ ./iobuffer.jl:44
  [3] _similar_data
    @ ./iobuffer.jl:156
  [4] ensureroom_slowpath
    @ ./iobuffer.jl:371
  [5] ensureroom
    @ ./iobuffer.jl:396
  [6] unsafe_write
    @ ./iobuffer.jl:522
  [7] unsafe_write
    @ ./io.jl:452
  [8] unsafe_write
    @ ./io.jl:803
  [9] write
    @ ./io.jl:837
 [10] show
    @ ./ryu/Ryu.jl:118
 [11] multiple call sites
    @ unknown:0
Reason: unsupported call to an unknown function (call to jl_alloc_genericmemory)
Stacktrace:
 [1] GenericMemory
   @ ./boot.jl:516
 [2] array_new_memory
   @ ./Base.jl:335
 [3] #133
   @ ./array.jl:1129
 [4] _growend!
   @ ./array.jl:1116
 [5] resize!
   @ ./array.jl:1450
 [6] show
   @ ./ryu/Ryu.jl:118
 [7] multiple call sites
   @ unknown:0
Reason: unsupported call to an external C function (call to ijl_alloc_string)
Stacktrace:
 [1] _string_n
   @ ./strings/string.jl:109
 [2] array_new_memory
   @ ./Base.jl:331
 [3] #133
   @ ./array.jl:1129
 [4] _growend!
   @ ./array.jl:1116
 [5] resize!
   @ ./array.jl:1450
 [6] show
   @ ./ryu/Ryu.jl:118
 [7] multiple call sites
   @ unknown:0
Reason: unsupported call to a lazy-initialized function (call to jl_string_to_genericmemory)
Stacktrace:
 [1] array_new_memory
   @ ./Base.jl:332
 [2] #133
   @ ./array.jl:1129
 [3] _growend!
   @ ./array.jl:1116
 [4] resize!
   @ ./array.jl:1450
 [5] show
   @ ./ryu/Ryu.jl:118
 [6] multiple call sites
   @ unknown:0
Hint: catch this exception as `err` and call `code_typed(err; interactive = true)` to introspect the erronous code with Cthulhu.jl
Stacktrace:
  [1] check_ir(job::GPUCompiler.CompilerJob{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}, args::LLVM.Module)
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/validation.jl:147
  [2] macro expansion
    @ ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:382 [inlined]
  [3] macro expansion
    @ ~/.julia/packages/TimerOutputs/6KVfH/src/TimerOutput.jl:253 [inlined]
  [4] macro expansion
    @ ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:381 [inlined]
  [5] emit_llvm(job::GPUCompiler.CompilerJob; toplevel::Bool, libraries::Bool, optimize::Bool, cleanup::Bool, validate::Bool, only_entry::Bool)
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/utils.jl:108
  [6] emit_llvm
    @ ~/.julia/packages/GPUCompiler/2CW9L/src/utils.jl:106 [inlined]
  [7] codegen(output::Symbol, job::GPUCompiler.CompilerJob; toplevel::Bool, libraries::Bool, optimize::Bool, cleanup::Bool, validate::Bool, strip::Bool, only_entry::Bool, parent_job::Nothing)
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:100
  [8] codegen
    @ ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:82 [inlined]
  [9] compile(target::Symbol, job::GPUCompiler.CompilerJob; kwargs::@Kwargs{})
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:79
 [10] compile
    @ ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:74 [inlined]
 [11] #1145
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/compilation.jl:250 [inlined]
 [12] JuliaContext(f::CUDA.var"#1145#1148"{GPUCompiler.CompilerJob{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}}; kwargs::@Kwargs{})
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:34
 [13] JuliaContext(f::Function)
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/driver.jl:25
 [14] compile(job::GPUCompiler.CompilerJob)
    @ CUDA ~/.julia/packages/CUDA/2kjXI/src/compiler/compilation.jl:249
 [15] actual_compilation(cache::Dict{Any, CuFunction}, src::Core.MethodInstance, world::UInt64, cfg::GPUCompiler.CompilerConfig{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}, compiler::typeof(CUDA.compile), linker::typeof(CUDA.link))
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/execution.jl:237
 [16] cached_compilation(cache::Dict{Any, CuFunction}, src::Core.MethodInstance, cfg::GPUCompiler.CompilerConfig{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}, compiler::Function, linker::Function)
    @ GPUCompiler ~/.julia/packages/GPUCompiler/2CW9L/src/execution.jl:151
 [17] macro expansion
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:380 [inlined]
 [18] macro expansion
    @ ./lock.jl:273 [inlined]
 [19] cufunction(f::GPUArrays.var"#34#36", tt::Type{Tuple{CUDA.CuKernelContext, CuDeviceVector{Q24f7, 1}, Base.Broadcast.Broadcasted{CUDA.CuArrayStyle{1, CUDA.DeviceMemory}, Tuple{Base.OneTo{Int64}}, CUDA.var"#1155#1156"{Q24f7}, Tuple{Base.Broadcast.Extruded{CuDeviceVector{Float32, 1}, Tuple{Bool}, Tuple{Int64}}}}, Int64}}; kwargs::@Kwargs{})
    @ CUDA ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:375
 [20] cufunction
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:372 [inlined]
 [21] macro expansion
    @ ~/.julia/packages/CUDA/2kjXI/src/compiler/execution.jl:112 [inlined]
 [22] #launch_heuristic#1200
    @ ~/.julia/packages/CUDA/2kjXI/src/gpuarrays.jl:17 [inlined]
 [23] launch_heuristic
    @ ~/.julia/packages/CUDA/2kjXI/src/gpuarrays.jl:15 [inlined]
 [24] _copyto!
    @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:78 [inlined]
 [25] copyto!
    @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:44 [inlined]
 [26] copy
    @ ~/.julia/packages/GPUArrays/qt4ax/src/host/broadcast.jl:29 [inlined]
 [27] materialize(bc::Base.Broadcast.Broadcasted{CUDA.CuArrayStyle{1, CUDA.DeviceMemory}, Nothing, Type{Q24f7}, Tuple{CuArray{Float32, 1, CUDA.DeviceMemory}}})
    @ Base.Broadcast ./broadcast.jl:867
 [28] top-level scope
    @ /data/ALOS/rosamond/julia_backproject/fp_gpu.jl:9
in expression starting at /data/ALOS/rosamond/julia_backproject/fp_gpu.jl:9

I've had trouble with the converting constructors for float Fixed{T,f}(v::Float64) and fixed-point Fixed{T,f}(v::Fixed{T2,f2}) types on GPU. The ctor with the dummy parameter Fixed{T,f}(v::Integer, _) seems to work fine but is pretty low-level. Personally I'm okay doing the float conversion on CPU and copying to GPU, but the fixed-to-fixed conversions need to happen on the device throughout my algorithm.

I'm pretty new to both this package and CUDA.jl so I don't have a good sense of how to proceed or how much work would be involved.

主要言語: Julia
スター: 95
フォーク: 38
平均マージ: 1日 7分
マージ済み PR（30日）: 4

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難易度 2/5 1〜3時間初心者へのやさしさ 76/100

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難易度 4/5 3〜5日初心者へのやさしさ 35/100

JuliaMath/FixedPointNumbers.jl#337 · 2026年9月22日に作成
Loading FixedPointNumbers invalidates ~7,700 precompiled method instances (7x slower first mtkcompile)
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難易度 5/5 1週間以上初心者へのやさしさ 42/100

JuliaMath/FixedPointNumbers.jl#331 · コメント 4 件 · 2026年9月6日に作成
`Fixed` does not fully support `fraction bits >= storage bits - 1`
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needs comments

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JuliaMath/FixedPointNumbers.jl#318 · コメント 1 件 · 2026年1月24日に作成
Negative number of fractional bits
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add-on enhancement

難易度 5/5 1週間以上初心者へのやさしさ 35/100

JuliaMath/FixedPointNumbers.jl#311 · コメント 4 件 · 2025年6月4日に作成

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Workspaces: `subdir` of a `[sources]` entry is dropped when another project depends on the same package
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難易度 2/5 1〜3時間初心者へのやさしさ 86/100

JuliaLang/Pkg.jl#4831 · 2026年9月27日に作成

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Reading an empty function handle throws KeyError: key "function_handle" not found
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難易度 2/5 1〜3時間初心者へのやさしさ 86/100

JuliaIO/MAT.jl#258 · 2026年9月27日に作成
`jh git-credential setup` writes `https://*.juliahub.com`, which Julia's LibGit2 cannot parse, breaking Pkg git fetches
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難易度 2/5 1〜3時間初心者へのやさしさ 70/100

JuliaComputing/jh#63 · コメント 1 件 · 2026年9月27日に作成
MIRK GlobalErrorControl HO estimator returns 0 because high_sol aliases cache.y₀.u
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難易度 2/5 1〜3時間初心者へのやさしさ 78/100

SciML/BoundaryValueDiffEq.jl#649 · 2026年9月26日に作成

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master red on NonlinearSolveFirstOrder [QA]: RobustTrustRegionLinsolve not public (all_explicit_imports_are_public)
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難易度 2/5 1〜3時間初心者へのやさしさ 84/100

SciML/NonlinearSolve.jl#1336 · 2026年9月26日に作成

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