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View Code? Open in Web Editor NEWFloating-point/RAM benchmark in C vs C++ vs Fortran, including complex arithmetic
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I suggest adding the topic benchmark in the About section at https://github.com/ahbarnett/floatingspeed
Use the intrinsic random_number subroutine in Fortran code instead of the rand() extension
Using random_number instead of rand() improves portability.
Compile errors on MacOS
Compilation for C-Type complex number code in for GCC 6.2 running on MacOS:
g++-6 utils.cpp -c
g++-6 complexmulttiming.cpp utils.o -o complexmulttimingc -Ofast -funroll-loops -D USE_C_TYPE_COMPLEX
complexmulttiming.cpp: In function 'int main(int, char**)':
complexmulttiming.cpp:115:5: error: 'complex' was not declared in this scope
complex double *z = (complex double *)malloc(sizeof(complex double)*M);
^~~~~~~
complexmulttiming.cpp:115:5: note: suggested alternative:
In file included from /usr/local/Cellar/gcc/6.2.0/include/c++/6.2.0/ccomplex:39:0,
from /usr/local/Cellar/gcc/6.2.0/include/c++/6.2.0/complex.h:32,
from complexmulttiming.cpp:4:
/usr/local/Cellar/gcc/6.2.0/include/c++/6.2.0/complex:63:32: note: 'std::complex'
template class complex;
^~~~~~~
complexmulttiming.cpp:116:13: error: expected ';' before 'double'
complex double *z2 = (complex double )malloc(sizeof(complex double)M);
^~~~~~
complexmulttiming.cpp:118:7: error: 'z' was not declared in this scope
z[i] = data1_re[i] + Idata1_im[i];
^
complexmulttiming.cpp:119:7: error: 'z2' was not declared in this scope
z2[i] = data2_re[i] + Idata2_im[i];
^~
complexmulttiming.cpp:123:7: error: 'z' was not declared in this scope
z[i] = z[i-1] + z[i] * z2[i];
^
complexmulttiming.cpp:123:30: error: 'z2' was not declared in this scope
z[i] = z[i-1] + z[i] * z2[i];
^~
complexmulttiming.cpp:126:89: error: 'z' was not declared in this scope
printf("%lld C-type complex mults in %.3g s\n\tresult = %.12f + %.12fI\n",M,t,creal(z[M-1]),cimag(z[M-1]));
^
complexmulttiming.cpp:127:19: error: 'z2' was not declared in this scope
free(z); free(z2);
^~
FYI: Here are some benchmarks on my laptop
This is not an issue, just a report for your info. Below is the result of running the run_all_tests.sh script 4 times on my laptop -- Dell Precision 7530.
(This excludes MATLAB)
(weirdly if I run fortran test on its own, rather than in the context of the script, I generally get higher rate - ranging between 1.7 and 2 Gpair/sec)
vscode@dc13b6d0654a:/workspaces/floatingspeed/lap3dkernel$ ./run_all_tests.sh
C++SIMD:
5 repetitions each run...
N=10000, M=10000. manual VCL SIMD avx512, ans: 470638087.690212
time: 0.189 s 2.64 Gpair/sec
N=10000, M=10000. manual VCL SIMD avx2 (256), ans: 470638087.690212
time: 0.183 s 2.74 Gpair/sec
N=10000, M=10000. target outer loop, ans: 470638087.690212
time: 0.424 s 1.18 Gpair/sec
N=10000, M=10000. source outer loop, ans: 470638087.690212
time: 0.641 s 0.78 Gpair/sec
FORTRAN:
./run_all_tests.sh: line 10: gfortran: command not found
ns= 10000 nt= 10000
ntest = 20 ...
tot= 7549471.0676897569
100000000 src-targ pairs in 1.26053715 s: 1.58662510 Gpair/s
JULIA:
targ-vec: 100000000 src-targ pairs in 1.96 s: 0.0511 Gpair/s
devec: 100000000 src-targ pairs in 0.28 s: 0.357 Gpair/s
devec par: 100000000 src-targ pairs in 0.0532 s: 1.88 Gpair/s
PYTHON:
native: 100000000 src-targ pairs in 2.04 s: 0.049 Gpair/s
numba: 100000000 src-targ pairs in 0.047 s: 2.13 Gpair/s
pot err numba vs native: 6.82e-13
MATLAB:
./run_all_tests.sh: line 22: matlab: command not found
OCTAVE:
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
test 1/r kernel in 3D. N=10000, M=10000...
targ-outer: u(test)=-204.925905525712 t=1.58 s 0.0635 Gpair/s
src-outer: u(test)=-204.925905525712 t=1.47 s 0.0681 Gpair/s
dense-matvec: u(test)=-204.9259055257115 t=3.51 s 0.0285 Gpair/s
vscode@dc13b6d0654a:/workspaces/floatingspeed/lap3dkernel$ ./run_all_tests.sh
C++SIMD:
5 repetitions each run...
N=10000, M=10000. manual VCL SIMD avx512, ans: 470638087.690212
time: 0.131 s 3.82 Gpair/sec
N=10000, M=10000. manual VCL SIMD avx2 (256), ans: 470638087.690212
time: 0.137 s 3.64 Gpair/sec
N=10000, M=10000. target outer loop, ans: 470638087.690212
time: 0.297 s 1.68 Gpair/sec
N=10000, M=10000. source outer loop, ans: 470638087.690212
time: 0.711 s 0.703 Gpair/sec
FORTRAN:
./run_all_tests.sh: line 10: gfortran: command not found
ns= 10000 nt= 10000
ntest = 20 ...
tot= 7453247.5122789210
100000000 src-targ pairs in 1.23374486 s: 1.62108076 Gpair/s
JULIA:
targ-vec: 100000000 src-targ pairs in 1.97 s: 0.0507 Gpair/s
devec: 100000000 src-targ pairs in 0.258 s: 0.388 Gpair/s
devec par: 100000000 src-targ pairs in 0.0501 s: 2 Gpair/s
PYTHON:
native: 100000000 src-targ pairs in 1.97 s: 0.0508 Gpair/s
numba: 100000000 src-targ pairs in 0.0437 s: 2.29 Gpair/s
pot err numba vs native: 6.82e-13
MATLAB:
./run_all_tests.sh: line 22: matlab: command not found
OCTAVE:
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
test 1/r kernel in 3D. N=10000, M=10000...
targ-outer: u(test)=-287.8825547996272 t=1.46 s 0.0683 Gpair/s
src-outer: u(test)=-287.8825547996272 t=1.46 s 0.0687 Gpair/s
dense-matvec: u(test)=-287.8825547996273 t=3.53 s 0.0283 Gpair/s
vscode@dc13b6d0654a:/workspaces/floatingspeed/lap3dkernel$ ./run_all_tests.sh
C++SIMD:
5 repetitions each run...
N=10000, M=10000. manual VCL SIMD avx512, ans: 470638087.690212
time: 0.161 s 3.11 Gpair/sec
N=10000, M=10000. manual VCL SIMD avx2 (256), ans: 470638087.690212
time: 0.17 s 2.93 Gpair/sec
N=10000, M=10000. target outer loop, ans: 470638087.690212
time: 0.425 s 1.18 Gpair/sec
N=10000, M=10000. source outer loop, ans: 470638087.690212
time: 0.663 s 0.755 Gpair/sec
FORTRAN:
./run_all_tests.sh: line 10: gfortran: command not found
ns= 10000 nt= 10000
ntest = 20 ...
tot= 7421530.2827616464
100000000 src-targ pairs in 1.27976596 s: 1.56278574 Gpair/s
JULIA:
targ-vec: 100000000 src-targ pairs in 1.93 s: 0.0519 Gpair/s
devec: 100000000 src-targ pairs in 0.264 s: 0.379 Gpair/s
devec par: 100000000 src-targ pairs in 0.0523 s: 1.91 Gpair/s
PYTHON:
native: 100000000 src-targ pairs in 1.96 s: 0.0511 Gpair/s
numba: 100000000 src-targ pairs in 0.0512 s: 1.95 Gpair/s
pot err numba vs native: 5.12e-13
MATLAB:
./run_all_tests.sh: line 22: matlab: command not found
OCTAVE:
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
test 1/r kernel in 3D. N=10000, M=10000...
targ-outer: u(test)=-143.9898175208911 t=1.45 s 0.0688 Gpair/s
src-outer: u(test)=-143.9898175208911 t=1.47 s 0.0679 Gpair/s
dense-matvec: u(test)=-143.9898175208914 t=3.53 s 0.0283 Gpair/s
vscode@dc13b6d0654a:/workspaces/floatingspeed/lap3dkernel$ ./run_all_tests.sh
C++SIMD:
5 repetitions each run...
N=10000, M=10000. manual VCL SIMD avx512, ans: 470638087.690212
time: 0.121 s 4.13 Gpair/sec
N=10000, M=10000. manual VCL SIMD avx2 (256), ans: 470638087.690212
time: 0.115 s 4.36 Gpair/sec
N=10000, M=10000. target outer loop, ans: 470638087.690212
time: 0.298 s 1.68 Gpair/sec
N=10000, M=10000. source outer loop, ans: 470638087.690212
time: 0.593 s 0.843 Gpair/sec
FORTRAN:
./run_all_tests.sh: line 10: gfortran: command not found
ns= 10000 nt= 10000
ntest = 20 ...
tot= 7469534.6971662715
100000000 src-targ pairs in 1.24486721 s: 1.60659707 Gpair/s
JULIA:
targ-vec: 100000000 src-targ pairs in 1.96 s: 0.0511 Gpair/s
devec: 100000000 src-targ pairs in 0.259 s: 0.386 Gpair/s
devec par: 100000000 src-targ pairs in 0.0506 s: 1.98 Gpair/s
PYTHON:
native: 100000000 src-targ pairs in 1.98 s: 0.0504 Gpair/s
numba: 100000000 src-targ pairs in 0.0494 s: 2.02 Gpair/s
pot err numba vs native: 4.55e-13
MATLAB:
./run_all_tests.sh: line 22: matlab: command not found
OCTAVE:
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
test 1/r kernel in 3D. N=10000, M=10000...
targ-outer: u(test)=120.4067525416816 t=1.43 s 0.0699 Gpair/s
src-outer: u(test)=120.4067525416816 t=1.46 s 0.0687 Gpair/s
dense-matvec: u(test)=120.4067525416806 t=3.55 s 0.0282 Gpair/s
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