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+# Copyright (C) 2013-2017 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`.
+# Add benchmark functions in alphabetical order.
+
+subdir := benchtests
+
+include ../Makeconfig
+bench-math := acos acosh asin asinh atan atanh cos cosh exp exp2 log log2 \
+	      modf pow rint sin sincos sinh sqrt tan tanh fmin fmax fminf \
+	      fmaxf
+
+bench-pthread := pthread_once
+
+bench-string := ffs ffsll
+
+bench := $(bench-math) $(bench-pthread) $(bench-string)
+
+# String function benchmarks.
+string-benchset := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
+		   mempcpy memset rawmemchr stpcpy stpncpy strcasecmp strcasestr \
+		   strcat strchr strchrnul strcmp strcpy strcspn strlen \
+		   strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
+		   strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
+		   strcoll memcpy-large memcpy-random memmove-large memset-large
+
+# Build and run locale-dependent benchmarks only if we're building natively.
+ifeq (no,$(cross-compiling))
+wcsmbs-benchset := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \
+		   wcscmp wcsncmp wcschr wcschrnul wcsrchr wcsspn wcspbrk wcscspn \
+		   wmemchr wmemset wmemcmp
+else
+wcsmbs-benchset :=
+endif
+
+string-benchset-all := $(string-benchset) ${wcsmbs-benchset}
+
+ifeq (no,$(cross-compiling))
+# We have to generate locales
+LOCALES := en_US.UTF-8 tr_TR.UTF-8 cs_CZ.UTF-8 fa_IR.UTF-8 fr_FR.UTF-8 \
+	   ja_JP.UTF-8 si_LK.UTF-8 en_GB.UTF-8 vi_VN.UTF-8 ar_SA.UTF-8 \
+	   da_DK.UTF-8 pl_PL.UTF-8 pt_PT.UTF-8 el_GR.UTF-8 ru_RU.UTF-8 \
+	   he_IL.UTF-8 is_IS.UTF-8 es_ES.UTF-8 hi_IN.UTF-8 sv_SE.UTF-8 \
+	   hu_HU.UTF-8 it_IT.UTF-8 sr_RS.UTF-8 zh_CN.UTF-8
+include ../gen-locales.mk
+endif
+
+stdlib-benchset := strtod
+
+stdio-common-benchset := sprintf
+
+math-benchset := math-inlines
+
+benchset := $(string-benchset-all) $(stdlib-benchset) $(stdio-common-benchset) \
+	    $(math-benchset)
+
+CFLAGS-bench-ffs.c += -fno-builtin
+CFLAGS-bench-ffsll.c += -fno-builtin
+CFLAGS-bench-sqrt.c += -fno-builtin
+CFLAGS-bench-fmin.c += -fno-builtin
+CFLAGS-bench-fminf.c += -fno-builtin
+CFLAGS-bench-fmax.c += -fno-builtin
+CFLAGS-bench-fmaxf.c += -fno-builtin
+
+bench-malloc := malloc-thread
+
+$(addprefix $(objpfx)bench-,$(bench-math)): $(libm)
+$(addprefix $(objpfx)bench-,$(math-benchset)): $(libm)
+$(addprefix $(objpfx)bench-,$(bench-pthread)): $(shared-thread-library)
+$(objpfx)bench-malloc-thread: $(shared-thread-library)
+
+
+
+# Rules to build and execute the benchmarks.  Do not put any benchmark
+# parameters beyond this point.
+
+# We don't want the benchmark programs to run in parallel since that could
+# affect their performance.
+.NOTPARALLEL:
+
+include ../Rules
+
+binaries-bench := $(addprefix $(objpfx)bench-,$(bench))
+binaries-benchset := $(addprefix $(objpfx)bench-,$(benchset))
+binaries-bench-malloc := $(addprefix $(objpfx)bench-,$(bench-malloc))
+
+# 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
+
+DETAILED_OPT :=
+
+ifdef DETAILED
+DETAILED_OPT := -d
+endif
+
+# This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
+# for all these modules.
+cpp-srcs-left := $(binaries-benchset:=.c) $(binaries-bench:=.c) \
+		 $(binaries-bench-malloc:=.c)
+lib := nonlib
+include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
+
+bench-extra-objs = json-lib.o
+
+extra-objs += $(bench-extra-objs)
+
+bench-deps := bench-skeleton.c bench-timing.h Makefile
+
+run-bench = $(test-wrapper-env) \
+	    $(run-program-env) \
+	    $($*-ENV) $(test-via-rtld-prefix) $${run}
+
+timing-type := $(objpfx)bench-timing-type
+
+bench-clean:
+	rm -f $(binaries-bench) $(addsuffix .o,$(binaries-bench))
+	rm -f $(binaries-benchset) $(addsuffix .o,$(binaries-benchset))
+	rm -f $(binaries-bench-malloc) $(addsuffix .o,$(binaries-bench-malloc))
+	rm -f $(timing-type) $(addsuffix .o,$(timing-type))
+	rm -f $(addprefix $(objpfx),$(bench-extra-objs))
+
+# Define the bench target only if the target has a usable python installation.
+ifdef PYTHON
+bench: bench-build bench-set bench-func bench-malloc
+else
+bench:
+	@echo "The bench target needs python to run."
+	@exit 1
+endif
+
+# Target to only build the benchmark without running it.  We generate locales
+# only if we're building natively.
+ifeq (no,$(cross-compiling))
+bench-build: $(gen-locales) $(timing-type) $(binaries-bench) \
+	$(binaries-benchset) $(binaries-bench-malloc)
+else
+bench-build: $(timing-type) $(binaries-bench) $(binaries-benchset) \
+	$(binaries-bench-malloc)
+endif
+
+bench-set: $(binaries-benchset)
+	for run in $^; do \
+	  echo "Running $${run}"; \
+	  $(run-bench) > $${run}.out; \
+	done
+
+bench-malloc: $(binaries-bench-malloc)
+	run=$(objpfx)bench-malloc-thread; \
+	for thr in 1 8 16 32; do \
+	  echo "Running $${run} $${thr}"; \
+	  $(run-bench) $${thr} > $${run}-$${thr}.out; \
+	done
+
+# Build and execute the benchmark functions.  This target generates JSON
+# formatted bench.out.  Each of the programs produce independent JSON output,
+# so one could even execute them individually and process it using any JSON
+# capable language or tool.
+bench-func: $(binaries-bench)
+	{ timing_type=$$($(timing-type)); \
+	echo "{\"timing_type\": \"$${timing_type}\","; \
+	echo " \"functions\": {"; \
+	for run in $^; do \
+	  if ! [ "x$${run}" = "x$<" ]; then \
+	    echo ","; \
+	  fi; \
+	  echo "Running $${run}" >&2; \
+	  $(run-bench) $(DETAILED_OPT); \
+	done; \
+	echo; \
+	echo " }"; \
+	echo "}"; } > $(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
+	$(PYTHON) scripts/validate_benchout.py $(objpfx)bench.out \
+		scripts/benchout.schema.json
+
+$(timing-type) $(binaries-bench) $(binaries-benchset) \
+	$(binaries-bench-malloc): %: %.o $(objpfx)json-lib.o \
+	$(link-extra-libs-tests) \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-tests)
+
+$(objpfx)bench-%.c: %-inputs $(bench-deps)
+	{ if [ -n "$($*-INCLUDE)" ]; then \
+	  cat $($*-INCLUDE); \
+	fi; \
+	$(PYTHON) scripts/bench.py $(patsubst %-inputs,%,$<); } > $@-tmp
+	mv -f $@-tmp $@