1 # Copyright (C) 2013 Free Software Foundation, Inc.
2 # This file is part of the GNU C Library.
4 # The GNU C Library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # The GNU C Library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with the GNU C Library; if not, see
16 # <http://www.gnu.org/licenses/>.
19 # Makefile for benchmark tests. The only useful target here is `bench`.
21 # Adding a new function `foo`:
22 # ---------------------------
24 # - Append the function name to the bench variable
26 # - Define foo-ARGLIST as a colon separated list of types of the input
27 # arguments. Use `void` if function does not take any inputs. Put in quotes
28 # if the input argument is a pointer, e.g.:
30 # malloc-ARGLIST: "void *"
32 # - Define foo-RET as the type the function returns. Skip if the function
33 # returns void. One could even skip foo-ARGLIST if the function does not
34 # take any inputs AND the function returns void.
37 # - Make a file called `foo-inputs` with one input value per line, an input
38 # being a comma separated list of arguments to be passed into the function.
39 # See pow-inputs for an example.
42 bench := exp pow rint sin cos tan atan modf
46 LDFLAGS-bench-exp = -lm
48 pow-ARGLIST = double:double
50 LDFLAGS-bench-pow = -lm
54 LDFLAGS-bench-rint = -lm
58 LDFLAGS-bench-sin = -lm
62 LDFLAGS-bench-cos = -lm
66 LDFLAGS-bench-tan = -lm
70 LDFLAGS-bench-atan = -lm
74 # Rules to build and execute the benchmarks. Do not put any benchmark
75 # parameters beyond this point.
80 binaries-bench := $(addprefix $(objpfx)bench-,$(bench))
82 # The default duration: 10 seconds.
87 CPPFLAGS-nonlib = -DDURATION=$(BENCH_DURATION)
89 # Use clock_gettime to measure performance of functions. The default is to use
90 # HP_TIMING if it is available.
91 ifdef USE_CLOCK_GETTIME
92 CPPFLAGS-nonlib += -DUSE_CLOCK_GETTIME
95 # This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
96 # for all these modules.
97 cpp-srcs-left := $(binaries-bench:=.c)
99 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
101 bench-deps := bench-skeleton.c bench-timing.h Makefile
103 run-bench = $(test-wrapper-env) \
104 GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
105 $($*-ENV) $(rtld-prefix) $${run}
108 rm -f $(binaries-bench) $(addsuffix .o,$(binaries-bench))
110 bench: $(binaries-bench)
111 { for run in $^; do \
112 echo "Running $${run}" >&2; \
114 done; } > $(objpfx)bench.out-tmp; \
115 if [ -f $(objpfx)bench.out ]; then \
116 mv -f $(objpfx)bench.out $(objpfx)bench.out.old; \
118 mv -f $(objpfx)bench.out-tmp $(objpfx)bench.out
120 $(binaries-bench): %: %.o \
121 $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
122 $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
125 $(objpfx)bench-%.c: %-inputs $(bench-deps)
126 { if [ -n "$($*-INCLUDE)" ]; then \
129 $(..)scripts/bench.pl $(patsubst %-inputs,%,$<) \
130 $($*-ARGLIST) $($*-RET); } > $@-tmp