mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-24 21:45:12 +00:00
73 lines
2 KiB
Text
73 lines
2 KiB
Text
This directory contains a benchmarking and testing program
|
|
for fftw3.
|
|
|
|
The `bench' program has a zillion options, because we use it for
|
|
benchmarking other FFT libraries as well. This file only documents
|
|
the basic usage of bench.
|
|
|
|
Usage: bench <commands>
|
|
|
|
where each command is as follows:
|
|
|
|
-s <problem>
|
|
--speed <problem>
|
|
|
|
Benchmarks the speed of <problem>.
|
|
|
|
The syntax for problems is [i|o][r|c][f|b]<size>, where
|
|
|
|
i/o means in-place or out-of-place. Out of place is the default.
|
|
r/c means real or complex transform. Complex is the default.
|
|
f/b means forward or backward transform. Forward is the default.
|
|
<size> is an arbitrary multidimensional sequence of integers
|
|
separated by the character 'x'.
|
|
|
|
(The syntax for problems is actually richer, but we do not document
|
|
it here. See the man page for fftw-wisdom for more information.)
|
|
|
|
Example:
|
|
|
|
ib256 : in-place backward complex transform of size 256
|
|
32x64 : out-of-place forward complex 2D transform of 32 rows
|
|
and 64 columns.
|
|
|
|
-y <problem>
|
|
--verify <problem>
|
|
|
|
Verify that FFTW is computing the correct answer.
|
|
|
|
The program does not output anything unless an error occurs or
|
|
verbosity is at least one.
|
|
|
|
-v<n>
|
|
|
|
Set verbosity to <n>, or 1 if <n> is omitted. -v2 will output
|
|
the created plans with fftw_print_plan.
|
|
|
|
-oestimate
|
|
-opatient
|
|
-oexhaustive
|
|
|
|
Plan with FFTW_ESTIMATE, FFTW_PATIENT, or FFTW_EXHAUSTIVE, respectively.
|
|
The default is FFTW_MEASURE.
|
|
|
|
If you benchmark FFTW, please use -opatient.
|
|
|
|
-onthreads=N
|
|
|
|
Use N threads, if FFTW was compiled with --enable-threads. N
|
|
must be a positive integer; the default is N=1.
|
|
|
|
-onosimd
|
|
|
|
Disable SIMD instructions (e.g. SSE or SSE2).
|
|
|
|
-ounaligned
|
|
|
|
Plan with the FFTW_UNALIGNED flag.
|
|
|
|
-owisdom
|
|
|
|
On startup, read wisdom from a file wis.dat in the current directory
|
|
(if it exists). On completion, write accumulated wisdom to wis.dat
|
|
(overwriting any existing file of that name).
|