performance measurements
Each table row shows performance measurements for this program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|
Read the ↓ make, command line, and program output logs to see how this program was run.
Read benchmark to see what this program should do.
notes
source code
# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org/
# Contributed by Sebastien Loisel
# Fixed by Isaac Gouy
# Sped up by Josh Goldfoot
# Dirtily sped up by Simon Descarpentries
# Concurrency by Jason Stitt
# 2to3
from multiprocessing import Pool
from math import sqrt
from sys import argv
cdef float eval_A(int i, int j):
return 1.0 / ((i + j) * (i + j + 1) / 2 + i + 1)
def eval_A_times_u(u):
cdef int i
args = ((i, u) for i in range(len(u)))
return pool.map(part_A_times_u, args)
def eval_At_times_u(u):
args = ((i, u) for i in range(len(u)))
return pool.map(part_At_times_u, args)
def eval_AtA_times_u(u):
return eval_At_times_u(eval_A_times_u(u))
def part_A_times_u(xxx_todo_changeme):
cdef int i, j, u_j, partial_sum
(i, u) = xxx_todo_changeme
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A(i, j) * u_j
return partial_sum
def part_At_times_u(xxx_todo_changeme1):
cdef int i, j, u_j, partial_sum
(i, u) = xxx_todo_changeme1
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A(j, i) * u_j
return partial_sum
def main():
cdef int n
cdef float ue, ve, vBv, vv
n = int(argv[1])
u = [1] * n
for dummy in range(10):
v = eval_AtA_times_u(u)
u = eval_AtA_times_u(v)
vBv = vv = 0
for ue, ve in zip(u, v):
vBv += ue * ve
vv += ve * ve
print("%0.9f" % (sqrt(vBv/vv)))
pool = Pool(processes=4)
main()
make, command-line, and program output logs
Sun, 23 Apr 2023 09:40:33 GMT
MAKE:
make[1]: Vstupuje se do adresáře „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“
cp spectralnorm.cython-5.cython `echo spectralnorm.cython-5.cython | sed 's/cython-..//' | sed 's/.cython//'`.pyx
cythonize -3 -bi `echo spectralnorm.cython-5.cython | sed 's/cython-..//' | sed 's/.cython//'`.pyx
Error compiling Cython file:
------------------------------------------------------------
...
cdef int i, j, u_j, partial_sum
(i, u) = xxx_todo_changeme
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A(i, j) * u_j
^
------------------------------------------------------------
spectralnorm.pyx:42:8: Cannot assign type 'float' to 'int'
Error compiling Cython file:
------------------------------------------------------------
...
cdef int i, j, u_j, partial_sum
(i, u) = xxx_todo_changeme1
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A(j, i) * u_j
^
------------------------------------------------------------
spectralnorm.pyx:52:8: Cannot assign type 'float' to 'int'
Compiling /home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp/spectralnorm.pyx because it changed.
[1/1] Cythonizing /home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp/spectralnorm.pyx
Traceback (most recent call last):
File "/usr/bin/cythonize", line 33, in <module>
sys.exit(load_entry_point('Cython==0.29.34', 'console_scripts', 'cythonize')())
File "/usr/lib/python3.10/site-packages/Cython/Build/Cythonize.py", line 225, in main
cython_compile(path, options)
File "/usr/lib/python3.10/site-packages/Cython/Build/Cythonize.py", line 97, in cython_compile
ext_modules = cythonize(
File "/usr/lib/python3.10/site-packages/Cython/Build/Dependencies.py", line 1115, in cythonize
cythonize_one(*args)
File "/usr/lib/python3.10/site-packages/Cython/Build/Dependencies.py", line 1238, in cythonize_one
raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: /home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp/spectralnorm.pyx
make[1]: *** [/home/dundee/work/pybenchmarks/bencher/makefiles/my.linux.Makefile:21: spectralnorm.cython-5.cython_run] Chyba 1
make[1]: Opouští se adresář „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“
0.31s to complete and log all make actions
COMMAND LINE:
/usr/bin/python3 -c "import spectralnorm" 550
PROGRAM FAILED
PROGRAM OUTPUT:
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'spectralnorm'