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-ITER with the number of iterations you want to run. Keep it
27 # high enough that the overhead of clock_gettime is only a small fraction of
28 # the total run time of the test. A good idea would be to keep the run time
29 # of each test at around 10 seconds for x86_64. That is just a guideline,
30 # since some scenarios may require higher run times.
32 # - Define foo-ARGLIST as a colon separated list of types of the input
33 # arguments. Use `void` if function does not take any inputs. Put in quotes
34 # if the input argument is a pointer, e.g.:
36 # malloc-ARGLIST: "void *"
38 # - Define foo-RET as the type the function returns. Skip if the function
39 # returns void. One could even skip foo-ARGLIST if the function does not
40 # take any inputs AND the function returns void.
43 # - Make a file called `foo-inputs` with one input value per line, an input
44 # being a comma separated list of arguments to be passed into the function.
45 # See pow-inputs for an example.
48 bench
:= exp pow rint sin cos tan atan \
49 slowexp slowpow slowsin slowcos slowtan slowatan
51 # exp function fast path
55 LDFLAGS-bench-exp
= -lm
57 # pow function fast path
59 pow-ARGLIST
= double
:double
61 LDFLAGS-bench-pow
= -lm
66 LDFLAGS-bench-rint
= -lm
68 # exp function slowest path
70 slowexp-ARGLIST
= double
72 slowexp-INCLUDE
= slowexp.c
73 LDFLAGS-bench-slowexp
= -lm
75 # sin function fast path
79 LDFLAGS-bench-sin
= -lm
81 # cos function fast path
85 LDFLAGS-bench-cos
= -lm
87 # tan function fast path
91 LDFLAGS-bench-tan
= -lm
93 # atan function fast path
97 LDFLAGS-bench-atan
= -lm
99 # pow function slowest path
101 slowpow-ARGLIST
= double
:double
103 slowpow-INCLUDE
= slowpow.c
104 LDFLAGS-bench-slowpow
= -lm
106 # sin function slowest path
108 slowsin-ARGLIST
= double
110 slowsin-INCLUDE
= slowsin.c
111 LDFLAGS-bench-slowsin
= -lm
113 # cos function slowest path
115 slowcos-ARGLIST
= double
117 slowcos-INCLUDE
= slowcos.c
118 LDFLAGS-bench-slowcos
= -lm
120 # tan function slowest path
122 slowtan-ARGLIST
= double
124 slowtan-INCLUDE
= slowtan.c
125 LDFLAGS-bench-slowtan
= -lm
127 # atan function slowest path
129 slowatan-ARGLIST
= double
130 slowatan-RET
= double
131 slowatan-INCLUDE
= slowatan.c
132 LDFLAGS-bench-slowatan
= -lm
136 # Rules to build and execute the benchmarks. Do not put any benchmark
137 # parameters beyond this point.
139 include ..
/Makeconfig
142 binaries-bench
:= $(addprefix $(objpfx
)bench-
,$(bench
))
144 # This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
145 # for all these modules.
146 cpp-srcs-left
:= $(binaries-bench
:=.c
)
148 include $(patsubst %,$(..
)cppflags-iterator.mk
,$(cpp-srcs-left
))
150 bench-deps
:= bench-skeleton.c Makefile
152 run-bench
= $(test-wrapper-env
) \
153 GCONV_PATH
=$(common-objpfx
)iconvdata LC_ALL
=C \
154 $($*-ENV
) $(rtld-prefix
) $${run}
157 rm -f
$(binaries-bench
) $(addsuffix .o
,$(binaries-bench
))
159 bench
: $(binaries-bench
)
160 { for run in
$^
; do \
161 echo
"Running $${run}" >&2; \
163 done
; } > $(objpfx
)bench.out-tmp
; \
164 if
[ -f
$(objpfx
)bench.out
]; then \
165 mv
-f
$(objpfx
)bench.out
$(objpfx
)bench.out.old
; \
167 mv
-f
$(objpfx
)bench.out-tmp
$(objpfx
)bench.out
169 $(binaries-bench
): %: %.o \
170 $(sort $(filter $(common-objpfx
)lib
%,$(link-libc
))) \
171 $(addprefix $(csu-objpfx
),start.o
) $(+preinit
) $(+postinit
)
174 $(objpfx
)bench-
%.c
: %-inputs
$(bench-deps
)
175 { if
[ -n
"$($*-INCLUDE)" ]; then \
178 $(..
)scripts
/bench.pl
$(patsubst %-inputs
,%,$<) \
179 $($*-ITER
) $($*-ARGLIST
) $($*-RET
); } > $@
-tmp