[PATCH] benchtests: Building benchmarks as static executables

[Noah Goldstein]

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.


>
> >>
> >> 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.
>