glibc/benchtests/Makefile

# Copyright (C) 2013 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.


# Makefile for benchmark tests.  The only useful target here is `bench`.

# Adding a new function `foo`:
# ---------------------------

# - Append the function name to the bench variable

# - Define foo-ITER with the number of iterations you want to run.  Keep it
#   high enough that the overhead of clock_gettime is only a small fraction of
#   the total run time of the test.  A good idea would be to keep the run time
#   of each test at around 10 seconds for x86_64.  That is just a guideline,
#   since some scenarios may require higher run times.

# - Define foo-ARGLIST as a colon separated list of types of the input
#   arguments.  Use `void` if function does not take any inputs.  Put in quotes
#   if the input argument is a pointer, e.g.:

#      malloc-ARGLIST: "void *"

# - Define foo-RET as the type the function returns.  Skip if the function
#   returns void.  One could even skip foo-ARGLIST if the function does not
#   take any inputs AND the function returns void.


# - Make a file called `foo-inputs` with one input value per line, an input
#   being a comma separated list of arguments to be passed into the function.
#   See pow-inputs for an example.

subdir := benchtests
bench := exp pow rint slowexp slowpow

# exp function fast path
exp-ITER = 5e8
exp-ARGLIST = double
exp-RET = double
LDFLAGS-bench-exp = -lm

# pow function fast path
pow-ITER = 2e8
pow-ARGLIST = double:double
pow-RET = double
LDFLAGS-bench-pow = -lm

rint-ITER = 250000000
rint-ARGLIST = double
rint-RET = double
LDFLAGS-bench-rint = -lm

# exp function slowest path
slowexp-ITER = 3e5
slowexp-ARGLIST = double
slowexp-RET = double
slowexp-INCLUDE = slowexp.c
LDFLAGS-bench-slowexp = -lm

# pow function slowest path
slowpow-ITER = 1e5
slowpow-ARGLIST = double:double
slowpow-RET = double
slowpow-INCLUDE = slowpow.c
LDFLAGS-bench-slowpow = -lm

include ../Makeconfig
include ../Rules