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Compiler settings for the examples

Krishna Narasimhan [please enable javascript to see the address]
Wed Sep 21 14:21:55 CEST 2016 

Hi Matthias,
   Thanks a lot. I did try doing the "make VERBOSE =1" and could not get
any info on the compiler settings. Could you help me out here. This is kind
of important for a paper I am submitting very shortly. The output doesnt
seem to have information on the compiler settings.

cd /home/krishna/vc/build6 && /usr/bin/cmake -H/home/krishna/vc
-B/home/krishna/vc/build6 --check-build-system CMakeFiles/Makefile.cmake 0
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_progress_start
/home/krishna/vc/build6/CMakeFiles
/home/krishna/vc/build6/examples/CMakeFiles/progress.marks
cd /home/krishna/vc/build6 && make -f CMakeFiles/Makefile2 examples/all
make[1]: Entering directory `/home/krishna/vc/build6'
make -f CMakeFiles/Vc.dir/build.make CMakeFiles/Vc.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc /home/krishna/vc/build6
/home/krishna/vc/build6
/home/krishna/vc/build6/CMakeFiles/Vc.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f CMakeFiles/Vc.dir/build.make CMakeFiles/Vc.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for `CMakeFiles/Vc.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
 2 3 4 5 6 7 8 9 10
[ 32%] Built target Vc
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_avx.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_avx.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/polarcoord
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/polarcoord
/home/krishna/vc/build6/examples/
polarcoord/CMakeFiles/example_polarcoord_avx.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_avx.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_avx.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for
`examples/polarcoord/CMakeFiles/example_polarcoord_avx.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
[ 32%] Built target example_polarcoord_avx
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_avx2.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_avx2.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/polarcoord
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/polarcoord
/home/krishna/vc/build6/examples/
polarcoord/CMakeFiles/example_polarcoord_avx2.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_avx2.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_avx2.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for
`examples/polarcoord/CMakeFiles/example_polarcoord_avx2.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
 35
[ 35%] Built target example_polarcoord_avx2
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_default.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_default.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/polarcoord
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/polarcoord
/home/krishna/vc/build6/examples/
polarcoord/CMakeFiles/example_polarcoord_default.dir/DependInfo.cmake
--color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_default.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_default.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for
`examples/polarcoord/CMakeFiles/example_polarcoord_default.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
[ 35%] Built target example_polarcoord_default
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_scalar.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_scalar.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/polarcoord
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/polarcoord
/home/krishna/vc/build6/examples/
polarcoord/CMakeFiles/example_polarcoord_scalar.dir/DependInfo.cmake
--color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_scalar.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_scalar.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for
`examples/polarcoord/CMakeFiles/example_polarcoord_scalar.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
[ 35%] Built target example_polarcoord_scalar
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_sse.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_sse.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/polarcoord
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/polarcoord
/home/krishna/vc/build6/examples/
polarcoord/CMakeFiles/example_polarcoord_sse.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/krishna/vc/build6'
make -f
examples/polarcoord/CMakeFiles/example_polarcoord_sse.dir/build.make
examples/polarcoord/CMakeFiles/example_polarcoord_sse.dir/build
make[2]: Entering directory `/home/krishna/vc/build6'
make[2]: Nothing to be done for
`examples/polarcoord/CMakeFiles/example_polarcoord_sse.dir/build'.
make[2]: Leaving directory `/home/krishna/vc/build6'
/usr/bin/cmake -E cmake_progress_report /home/krishna/vc/build6/CMakeFiles
 36
[ 39%] Built target example_polarcoord_sse
make -f examples/matrix/CMakeFiles/example_matrix_avx.dir/build.make
examples/matrix/CMakeFiles/example_matrix_avx.dir/depend
make[2]: Entering directory `/home/krishna/vc/build6'
cd /home/krishna/vc/build6 && /usr/bin/cmake -E cmake_depends "Unix
Makefiles" /home/krishna/vc /home/krishna/vc/examples/matrix
/home/krishna/vc/build6 /home/krishna/vc/build6/examples/matrix
/home/krishna/vc/build6/examples/matrix/

[please enable javascript to see the address]> wrote:

> Hi Krishna,
>
> when you compile a project using cmake, use 'make VERBOSE=1' to see the
> compiler flags it uses.
>
> In very few cases, in Vc, I use compiler flags to inhibit automatic
> vectorization (if I want to compare scalar vs. vector *hardware*). I don't
> recall right now what I do for the polar coordinates case, but I think I
> leave
> the compiler on -O3 (i.e. autovectorize and optimize as much as possible).
>
> In general, I think your argument should not be: my code transformation can
> vectorize something that a compiler does not vectorize. That's a race
> against
> many very smart people. I think what you want to show is that you can
> transform a given scalar code base into a Vc code base as a useful basis
> for
> further manual vectorization development. That's something compilers don't
> do
> at all...
>
> Cheers,
>   Matthias
>
> On Samstag, 27. August 2016 10:52:55 CEST Krishna Narasimhan wrote:
> > Hi all,
> >     I am wondering about the compiler settings for the example files
> > posted. I ran a small test on the cartesian-polar coordinate example in
> the
> > VC website and just used the makefile available there to assess the run
> > times. And the run times for the VC was substantially better than the run
> > times for the Scalar versions. But the question is couldnt compiler level
> > optimizations have done this already. And was wondering what level the
> > compilers are set for the basic makefiles in the VC by default.
> >
> > Basically, I am using the polar cartesian co ordinate example as part of
> my
> > research with programming languages (and simple vc transformations are
> one
> > of the evaluation) and would be nice to justify even these simple
> > transformations are not stuff that compilers dont vectorize
> automatically.
> >
> >
> >
> > Best
> > Krishna
>
>
> --
> ──────────────────────────────────────────────────────────────────────────
>  Dr. Matthias Kretz                                https://kretzfamily.de
>  GSI Helmholtzzentrum für Schwerionenforschung             https://gsi.de
>  SIMD easy and portable                     https://github.com/VcDevel/Vc
> ──────────────────────────────────────────────────────────────────────────
> _______________________________________________
> Vc mailing list
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