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Some math functions have distinct performance characteristics in specific domains of inputs, where some inputs return via a fast path while other inputs require multiple precision calculations, that too at different precision levels. The way to implement different domains was to have a separate source file and benchmark definition, resulting in separate programs. This clutters up the benchmark, so this change allows these domains to be consolidated into the same input file. To do this, the input file format is now enhanced to allow comments with a preceding # and directives with two # at the begining of a line. A directive that looks like: tells the benchmark generation script that what follows is a different domain of inputs. The value of the 'name' directive (in this case, foo) is used in the output. The two input domains are then executed sequentially and their results collated separately. with the above directive, there would be two lines in the result that look like: func(): .... func(foo): ...
126 lines
3.5 KiB
Makefile
126 lines
3.5 KiB
Makefile
# Copyright (C) 2013 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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# Makefile for benchmark tests. The only useful target here is `bench`.
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# Adding a new function `foo`:
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# ---------------------------
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# - Append the function name to the bench variable
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# - Define foo-ARGLIST as a colon separated list of types of the input
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# arguments. Use `void` if function does not take any inputs. Put in quotes
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# if the input argument is a pointer, e.g.:
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# malloc-ARGLIST: "void *"
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# - Define foo-RET as the type the function returns. Skip if the function
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# returns void. One could even skip foo-ARGLIST if the function does not
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# take any inputs AND the function returns void.
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# - Make a file called `foo-inputs` with one input value per line, an input
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# being a comma separated list of arguments to be passed into the function.
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# See pow-inputs for an example.
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subdir := benchtests
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bench := exp pow rint sin cos tan atan modf
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exp-ARGLIST = double
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exp-RET = double
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LDFLAGS-bench-exp = -lm
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pow-ARGLIST = double:double
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pow-RET = double
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LDFLAGS-bench-pow = -lm
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rint-ARGLIST = double
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rint-RET = double
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LDFLAGS-bench-rint = -lm
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sin-ARGLIST = double
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sin-RET = double
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LDFLAGS-bench-sin = -lm
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cos-ARGLIST = double
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cos-RET = double
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LDFLAGS-bench-cos = -lm
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tan-ARGLIST = double
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tan-RET = double
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LDFLAGS-bench-tan = -lm
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atan-ARGLIST = double
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atan-RET = double
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LDFLAGS-bench-atan = -lm
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# Rules to build and execute the benchmarks. Do not put any benchmark
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# parameters beyond this point.
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include ../Makeconfig
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include ../Rules
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binaries-bench := $(addprefix $(objpfx)bench-,$(bench))
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# The default duration: 10 seconds.
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ifndef BENCH_DURATION
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BENCH_DURATION := 10
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endif
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CPPFLAGS-nonlib = -DDURATION=$(BENCH_DURATION)
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# This makes sure CPPFLAGS-nonlib and CFLAGS-nonlib are passed
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# for all these modules.
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cpp-srcs-left := $(binaries-bench:=.c)
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lib := nonlib
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include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
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bench-deps := bench-skeleton.c Makefile
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run-bench = $(test-wrapper-env) \
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GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
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$($*-ENV) $(rtld-prefix) $${run}
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bench-clean:
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rm -f $(binaries-bench) $(addsuffix .o,$(binaries-bench))
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bench: $(binaries-bench)
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{ for run in $^; do \
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echo "Running $${run}" >&2; \
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$(run-bench); \
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done; } > $(objpfx)bench.out-tmp; \
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if [ -f $(objpfx)bench.out ]; then \
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mv -f $(objpfx)bench.out $(objpfx)bench.out.old; \
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fi; \
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mv -f $(objpfx)bench.out-tmp $(objpfx)bench.out
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$(binaries-bench): %: %.o \
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$(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
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$(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
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$(+link)
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$(objpfx)bench-%.c: %-inputs $(bench-deps)
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{ if [ -n "$($*-INCLUDE)" ]; then \
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cat $($*-INCLUDE); \
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fi; \
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$(..)scripts/bench.pl $(patsubst %-inputs,%,$<) \
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$($*-ARGLIST) $($*-RET); } > $@-tmp
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mv -f $@-tmp $@
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