Re: [PATCH] benchtests: Building benchmarks as static executables

["H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>]

On Mon, Aug 9, 2021 at 1:07 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>
>
>
> On Mon, Aug 9, 2021 at 3:34 PM H.J. Lu <hjl.tools@gmail.com> wrote:
>>
>> On Mon, Aug 9, 2021 at 12:10 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>> >
>> >
>> >
>> > On Fri, Jul 30, 2021 at 5:22 PM H.J. Lu via Libc-alpha <libc-alpha@sourceware.org> wrote:
>> >>
>> >> Building benchmarks as static executables:
>> >> =========================================
>> >>
>> >> To build benchmarks as static executables, on the build system, run:
>> >>
>> >>   $ make STATIC-BENCHTESTS=yes bench-build
>> >>
>> >
>> > Any chance you could add a -falign option for this?
>>
>> To build glibc or build a specific bench test?
>
>
> I think the functions being benchmarked are the important ones so
> if that's what you mean by a specific bench test then that should be
> good. The entire build would be fine as well imho.

I do

 $ BUILD_CC="gcc" CC="gcc" CXX="g++" CFLAGS="-O2 -g -ffoobar" .../configure

to pass -ffoobar to glibc build.

>
>>
>>
>> >>
>> >> You can copy benchmark executables to another machine and run them
>> >> without copying the source nor build directories.
>> >> ---
>> >>  benchtests/Makefile | 26 +++++++++++++++++++-------
>> >>  benchtests/README   | 10 ++++++++++
>> >>  2 files changed, 29 insertions(+), 7 deletions(-)
>> >>
>> >> diff --git a/benchtests/Makefile b/benchtests/Makefile
>> >> index 1530939a8c..4fcd73131a 100644
>> >> --- a/benchtests/Makefile
>> >> +++ b/benchtests/Makefile
>> >> @@ -110,11 +110,23 @@ else
>> >>  bench-malloc := $(filter malloc-%,${BENCHSET})
>> >>  endif
>> >>
>> >> -$(addprefix $(objpfx)bench-,$(bench-math)): $(libm)
>> >> -$(addprefix $(objpfx)bench-,$(math-benchset)): $(libm)
>> >> -$(addprefix $(objpfx)bench-,$(bench-pthread)): $(shared-thread-library)
>> >> -$(addprefix $(objpfx)bench-,$(bench-malloc)): $(shared-thread-library)
>> >> -$(addprefix $(objpfx)bench-,pthread-locks): $(libm)
>> >> +ifeq (${STATIC-BENCHTESTS},yes)
>> >> ++link-benchtests = $(+link-static-tests)
>> >> +link-libc-benchtests = $(link-libc-static)
>> >> +libm-benchtests = $(common-objpfx)math/libm.a
>> >> +thread-library-benchtests = $(static-thread-library)
>> >> +else
>> >> +link-libc-benchtests = $(link-libc)
>> >> ++link-benchtests = $(+link-tests)
>> >> +thread-library-benchtests = $(shared-thread-library)
>> >> +libm-benchtests = $(libm)
>> >> +endif
>> >> +
>> >> +$(addprefix $(objpfx)bench-,$(bench-math)): $(libm-benchtests)
>> >> +$(addprefix $(objpfx)bench-,$(math-benchset)): $(libm-benchtests)
>> >> +$(addprefix $(objpfx)bench-,$(bench-pthread)): $(thread-library-benchtests)
>> >> +$(addprefix $(objpfx)bench-,$(bench-malloc)): $(thread-library-benchtests)
>> >> +$(addprefix $(objpfx)bench-,pthread-locks): $(libm-benchtests)
>> >>
>> >>
>> >>
>> >> @@ -270,9 +282,9 @@ bench-link-targets = $(timing-type) $(binaries-bench) $(binaries-benchset) \
>> >>
>> >>  $(bench-link-targets): %: %.o $(objpfx)json-lib.o \
>> >>         $(link-extra-libs-tests) \
>> >> -  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
>> >> +  $(sort $(filter $(common-objpfx)lib%,$(link-libc-benchtests))) \
>> >>    $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
>> >> -       $(+link-tests)
>> >> +       $(+link-benchtests)
>> >>
>> >>  $(bench-link-targets): LDFLAGS += $(link-bench-bind-now)
>> >>
>> >> diff --git a/benchtests/README b/benchtests/README
>> >> index 44736d7e63..4d83a05b4b 100644
>> >> --- a/benchtests/README
>> >> +++ b/benchtests/README
>> >> @@ -62,6 +62,16 @@ otherwise the above command may try to build the benchmark again.  Benchmarks
>> >>  that require generated code to be executed during the build are skipped when
>> >>  cross-building.
>> >>
>> >> +Building benchmarks as static executables:
>> >> +=========================================
>> >> +
>> >> +To build benchmarks as static executables, on the build system, run:
>> >> +
>> >> +  $ make STATIC-BENCHTESTS=yes bench-build
>> >> +
>> >> +You can copy benchmark executables to another machine and run them
>> >> +without copying the source nor build directories.
>> >> +
>> >>  Running subsets of benchmarks:
>> >>  ==============================
>> >>
>> >> --
>> >> 2.31.1
>> >>
>>
>>
>> --
>> H.J.



-- 
H.J.