Arch D. Robison ArchRobison
ArchRobison
/ gist:9808976
Created
March 27, 2014 14:38
Example using Julia and LLVM trunk. SLPVectorizer appears to have generated superfluious extracts.
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| $ cat vadd.jl | |
| function vadd( a::NTuple{4,Float64}, b::NTuple{4,Float64} ) | |
| (a[1]+b[1],a[2]+b[2],a[3]+b[3],a[4]+b[4]) | |
| end | |
| function vadd_one!(arr::Array{Float64, 1}) | |
| len = length(arr) # assuming len multiple of 4 | |
| one = (1.0, 1.0, 1.0, 1.0) | |
| @inbounds for i = 1:4:len | |
| inp = (arr[i], arr[i+1], arr[i+2], arr[i+3]) |
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| $ cat v.jl | |
| function vadd_one!(arr::Array{Float32, 1}) | |
| @simd for i = 1:length(arr) | |
| @inbounds arr[i] += 1 | |
| end | |
| end | |
| code_llvm(vadd_one!,(Array{Float32, 1},)) | |
| $ julia v.jl |
ArchRobison
/ gist:9944313
Created
April 2, 2014 22:13
Excerpt of Julia LLVM code from LLVM trunk (pre-3.5 LLVM)
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| L.preheader: ; preds = %top | |
| %.op = add i64 %0, 1, !dbg !9 | |
| %8 = select i1 %2, i64 %.op, i64 1, !dbg !9 | |
| %9 = sub i64 %8, %5, !dbg !9 | |
| %xtraiter = and i64 %9, 7 | |
| switch i64 %xtraiter, label %L.unr [ | |
| i64 0, label %L.preheader.split | |
| i64 1, label %L.unr22 | |
| i64 2, label %L.unr18 | |
| i64 3, label %L.unr14 |
ArchRobison
/ gist:a7c4cf396c5332a4ddd2
Created
May 1, 2014 14:59
Patch to Julia sources to quiet Intel(R) VTune(TM) Amplifier warning about "sigal stack".
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| --- a/src/init.c | |
| +++ b/src/init.c | |
| @@ -64,6 +64,9 @@ extern BOOL (WINAPI *hSymRefreshModuleList)(HANDLE); | |
| #include <sched.h> // for setting CPU affinity | |
| #endif | |
| +#undef SIGSTKSZ | |
| +#define SIGSTKSZ (64*1024) | |
| + | |
| char *julia_home = NULL; |
ArchRobison
/ gist:477eb33a6bac0aa17218
Created
May 22, 2014 22:32
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| :::::::::::::: | |
| test1.jl | |
| :::::::::::::: | |
| # Example from early discussion. | |
| # Has constant lower bound, expression as upper bound, and no reductions. | |
| function test1( a, x, y ) | |
| @simd for i=1:length(x) | |
| @inbounds y[i] = y[i]+a*x[i] | |
| end | |
| end |
ArchRobison
/ gist:74dd2a89010eef5a1bf8
Created
June 18, 2014 18:29
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| $ cat y.jl | |
| cat: y.jl: No such file or directory | |
| $ cat /tmp/y.jl | |
| function saxpy( a, x, y ) | |
| @simd for i=1:length(x) | |
| @inbounds y[i] = y[i]+a*x[i] | |
| end | |
| end | |
| code_native( saxpy, (Float32,Array{Float32,1},Array{Float32,1}) ) |
ArchRobison
/ gist:d3601433d160b05ed5ee
Created
June 25, 2014 17:56
patch to LLVM 3.3 to work around Intel VTune Amplifier bug. For Julia, apply to julia/deps/llvm-3.3/lib/ExecutionEngine/IntelJITEvents/IntelJITEventListener.cpp
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| --- IntelJITEventListener.cpp.orig 2014-05-15 13:45:30.079547337 -0500 | |
| +++ IntelJITEventListener.cpp 2014-05-15 13:46:43.647359854 -0500 | |
| @@ -174,6 +174,11 @@ | |
| FunctionMessage.line_number_table = 0; | |
| } | |
| +#define AMPLIFIER_BUG_WORKAROUND 1 | |
| +#if AMPLIFIER_BUG_WORKAROUND | |
| + for( unsigned i=FunctionMessage.line_number_size; i-->0; ) | |
| + FunctionMessage.line_number_table[i].LineNumber = i>0 ? FunctionMessage.line_number_table[i-1].LineNumber : 0; |
ArchRobison
/ gist:499c545fa1ca601e8083
Created
October 7, 2014 18:58
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| julia> Pkg.add("MPI") | |
| INFO: Installing MPI v0.2.2 | |
| INFO: Building MPI | |
| INFO: Attempting to Create directory /nfs/fx/disks/fx_home_disk2/adrobiso/.julia/v0.3/MPI/deps/build | |
| INFO: Directory /nfs/fx/disks/fx_home_disk2/adrobiso/.julia/v0.3/MPI/deps/build already created | |
| INFO: Changing Directory to /nfs/fx/disks/fx_home_disk2/adrobiso/.julia/v0.3/MPI/deps/build | |
| CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:108 (message): | |
| Could NOT find MPI_C (missing: MPI_C_LIBRARIES) | |
| Call Stack (most recent call first): | |
| /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:315 (_FPHSA_FAILURE_MESSAGE) |
ArchRobison
/ gist:b8aa89617089f1f0b63f
Last active
August 29, 2015 14:07
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| $ rm -rf build | |
| $ julia build.jl | |
| INFO: Attempting to Create directory /nfs/fx/disks/fx_home_disk2/adrobiso/.julia/v0.3/MPI/deps/build | |
| INFO: Changing Directory to /nfs/fx/disks/fx_home_disk2/adrobiso/.julia/v0.3/MPI/deps/build | |
| -- The Fortran compiler identification is GNU | |
| -- The C compiler identification is GNU 4.8.2 | |
| -- Check for working Fortran compiler: /bin/f95 | |
| -- Check for working Fortran compiler: /bin/f95 -- works | |
| -- Detecting Fortran compiler ABI info | |
| -- Detecting Fortran compiler ABI info - done |
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| $ for f in *.jl; do echo $f; mpiexec -np 4 julia $f; done | |
| 01-hello.jl | |
| Hello world, I am 1 of 4Hello world, I am 3 of 4Hello world, I am 2 of 4Hello world, I am 0 of 4 | |
| 02-broadcast.jl | |
| ------------------------------------------------------------------------------ | |
| Running on 4 processes | |
| ------------------------------------------------------------------------------ |