mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
43fe811b73
HP_TIMING uses native timestamping instructions if available, thus greatly reducing the overhead of recording start and end times for function calls. For architectures that don't have HP_TIMING available, we fall back to the clock_gettime bits. One may also override this by invoking the benchmark as follows: make USE_CLOCK_GETTIME=1 bench and get the benchmark results using clock_gettime. One has to do `make bench-clean` to ensure that the benchmark programs are rebuilt.
132 lines
3.7 KiB
Makefile
132 lines
3.7 KiB
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-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 sin cos tan atan modf
|
||
|
||
exp-ARGLIST = double
|
||
exp-RET = double
|
||
LDFLAGS-bench-exp = -lm
|
||
|
||
pow-ARGLIST = double:double
|
||
pow-RET = double
|
||
LDFLAGS-bench-pow = -lm
|
||
|
||
rint-ARGLIST = double
|
||
rint-RET = double
|
||
LDFLAGS-bench-rint = -lm
|
||
|
||
sin-ARGLIST = double
|
||
sin-RET = double
|
||
LDFLAGS-bench-sin = -lm
|
||
|
||
cos-ARGLIST = double
|
||
cos-RET = double
|
||
LDFLAGS-bench-cos = -lm
|
||
|
||
tan-ARGLIST = double
|
||
tan-RET = double
|
||
LDFLAGS-bench-tan = -lm
|
||
|
||
atan-ARGLIST = double
|
||
atan-RET = double
|
||
LDFLAGS-bench-atan = -lm
|
||
|
||
|
||
|
||
# Rules to build and execute the benchmarks. Do not put any benchmark
|
||
# parameters beyond this point.
|
||
|
||
include ../Makeconfig
|
||
include ../Rules
|
||
|
||
binaries-bench := $(addprefix $(objpfx)bench-,$(bench))
|
||
|
||
# The default duration: 10 seconds.
|
||
ifndef BENCH_DURATION
|
||
BENCH_DURATION := 10
|
||
endif
|
||
|
||
CPPFLAGS-nonlib = -DDURATION=$(BENCH_DURATION)
|
||
|
||
# Use clock_gettime to measure performance of functions. The default is to use
|
||
# HP_TIMING if it is available.
|
||
ifdef USE_CLOCK_GETTIME
|
||
CPPFLAGS-nonlib += -DUSE_CLOCK_GETTIME
|
||
endif
|
||
|
||
# This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
|
||
# for all these modules.
|
||
cpp-srcs-left := $(binaries-bench:=.c)
|
||
lib := nonlib
|
||
include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
|
||
|
||
bench-deps := bench-skeleton.c bench-timing.h Makefile
|
||
|
||
run-bench = $(test-wrapper-env) \
|
||
GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
|
||
$($*-ENV) $(rtld-prefix) $${run}
|
||
|
||
bench-clean:
|
||
rm -f $(binaries-bench) $(addsuffix .o,$(binaries-bench))
|
||
|
||
bench: $(binaries-bench)
|
||
{ for run in $^; do \
|
||
echo "Running $${run}" >&2; \
|
||
$(run-bench); \
|
||
done; } > $(objpfx)bench.out-tmp; \
|
||
if [ -f $(objpfx)bench.out ]; then \
|
||
mv -f $(objpfx)bench.out $(objpfx)bench.out.old; \
|
||
fi; \
|
||
mv -f $(objpfx)bench.out-tmp $(objpfx)bench.out
|
||
|
||
$(binaries-bench): %: %.o \
|
||
$(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
|
||
$(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
|
||
$(+link)
|
||
|
||
$(objpfx)bench-%.c: %-inputs $(bench-deps)
|
||
{ if [ -n "$($*-INCLUDE)" ]; then \
|
||
cat $($*-INCLUDE); \
|
||
fi; \
|
||
$(..)scripts/bench.pl $(patsubst %-inputs,%,$<) \
|
||
$($*-ARGLIST) $($*-RET); } > $@-tmp
|
||
mv -f $@-tmp $@
|