1 # Copyright (C) 2013-2014 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`.
20 # Add benchmark functions in alphabetical order.
25 bench-math := acos acosh asin asinh atan atanh cos cosh exp exp2 ffs ffsll \
26 log log2 modf pow rint sin sincos sinh sqrt tan tanh
28 bench-pthread := pthread_once
30 bench := $(bench-math) $(bench-pthread)
32 # String function benchmarks.
33 string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
34 mempcpy memset rawmemchr stpcpy stpncpy strcasecmp strcasestr \
35 strcat strchr strchrnul strcmp strcpy strcspn strlen \
36 strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
37 strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok
38 string-bench-all := $(string-bench)
40 stdlib-bench := strtod
42 benchset := $(string-bench-all) $(stdlib-bench)
44 CFLAGS-bench-ffs.c += -fno-builtin
45 CFLAGS-bench-ffsll.c += -fno-builtin
47 $(addprefix $(objpfx)bench-,$(bench-math)): $(common-objpfx)math/libm.so
48 $(addprefix $(objpfx)bench-,$(bench-pthread)): \
49 $(common-objpfx)nptl/libpthread.so
53 # Rules to build and execute the benchmarks. Do not put any benchmark
54 # parameters beyond this point.
56 # We don't want the benchmark programs to run in parallel since that could
57 # affect their performance.
62 binaries-bench := $(addprefix $(objpfx)bench-,$(bench))
63 binaries-benchset := $(addprefix $(objpfx)bench-,$(benchset))
65 # The default duration: 10 seconds.
70 CPPFLAGS-nonlib += -DDURATION=$(BENCH_DURATION)
72 # Use clock_gettime to measure performance of functions. The default is to use
73 # HP_TIMING if it is available.
74 ifdef USE_CLOCK_GETTIME
75 CPPFLAGS-nonlib += -DUSE_CLOCK_GETTIME
84 # This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
85 # for all these modules.
86 cpp-srcs-left := $(binaries-benchset:=.c) $(binaries-bench:=.c)
88 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
90 extra-objs += json-lib.o
92 bench-deps := bench-skeleton.c bench-timing.h Makefile
94 run-bench = $(test-wrapper-env) \
95 GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
96 $($*-ENV) $(rtld-prefix) $${run}
98 timing-type := $(objpfx)bench-timing-type
101 rm -f $(binaries-bench) $(addsuffix .o,$(binaries-bench))
102 rm -f $(binaries-benchset) $(addsuffix .o,$(binaries-benchset))
103 rm -f $(timing-type) $(addsuffix .o,$(timing-type))
105 bench: $(timing-type) bench-set bench-func
107 bench-set: $(binaries-benchset)
109 echo "Running $${run}"; \
110 $(run-bench) > $${run}.out; \
113 # Build and execute the benchmark functions. This target generates JSON
114 # formatted bench.out. Each of the programs produce independent JSON output,
115 # so one could even execute them individually and process it using any JSON
116 # capable language or tool.
117 bench-func: $(binaries-bench)
118 { timing_type=$$($(timing-type)); \
119 echo "{\"timing_type\": \"$${timing_type}\","; \
120 echo " \"functions\": {"; \
122 if ! [ "x$${run}" = "x$<" ]; then \
125 echo "Running $${run}" >&2; \
126 $(run-bench) $(DETAILED_OPT); \
130 echo "}"; } > $(objpfx)bench.out-tmp; \
131 if [ -f $(objpfx)bench.out ]; then \
132 mv -f $(objpfx)bench.out $(objpfx)bench.out.old; \
134 mv -f $(objpfx)bench.out-tmp $(objpfx)bench.out
136 $(timing-type) $(binaries-bench) $(binaries-benchset): %: %.o $(objpfx)json-lib.o \
137 $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
138 $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
141 $(objpfx)bench-%.c: %-inputs $(bench-deps)
142 { if [ -n "$($*-INCLUDE)" ]; then \
145 $(.)scripts/bench.py $(patsubst %-inputs,%,$<); } > $@-tmp