Leo P. wrote:
Thanks for the information. And i had already clicked on the
"Show All" button in the profiler before i send an email to the group.
But it did not work :(
Okay. Hmm. For me, when I try Analyzer, I don't see any of the
internals of MPI. Then, when I "Show All", all the internal OMPI
layers are exposed: PML, opal_progress, BTL, etc.
Also
Eugene, can you please help me understand what does turning on -g
option mean. Currently i am building the system with the following
option
./configure --with-devel-headers --enable-trace --enable-mpi-profile
--enable-mem-debug --enable-debug
Do i need to add something additional here ?
I don't know. To turn on -g, I add it via environment variables.
E.g., to build OMPI with Sun Studio compilers, I use:
setenv CC cc
setenv CXX CC
setenv F77 f77
setenv FC f90
setenv CFLAGS "-fast -xarch=native -g -m64"
setenv CXXFLAGS "-fast -xarch=native -g -m64"
setenv FFLAGS "-fast -xarch=native -g -m64"
setenv FCFLAGS "-fast -xarch=native -g -m64"
With GCC compilers, I use:
setenv CFLAGS "-O -g -m64"
setenv CXXFLAGS "-O -g -m64"
setenv FFLAGS "-O -g -m64"
setenv FCFLAGS "-O -g -m64"
I don't know if that's politically correct or whatever, but that's what
I did. Then:
./configure \
--with-mpi-param_check=never \
--disable-mpi-cxx \
--disable-mpi-cxx-seek \
--enable-mpirun-prefix-by-default \
--prefix=blahblahblah
make all
make install
That seems to work for me. Doesn't matter if I build OMPI and my MPI
code with GCC or with Sun Studio compilers. I just use Sun Studio
Performance Analyzer, turn on "Show All", and see where time is spent
in the internal OMPI layers.
Also
i don't understand what you mean by tool ecosystem. [I am a complete
newbie ]
That's a little unrelated. It means the opinion that OMPI is just MPI,
without a bunch of tools (debuggers, performance analysis, etc.), that
go along with it. It's not really fair since you can use TotalView
debugging, VampirTrace, PERUSE, etc. with OMPI. There's a subjective
judgment about whether all those things are well integrated together or
just add-ons. E.g., with MPICH, they have MPE extensions, the Jumpshot
tool, etc. It's all understood to be one set of software. (Yipes, I
hope I don't start too controversial an e-mail storm here. Again, it's
not an entirely fair assessment of OMPI. I guess I just mean there is
no such thing as *THE* OMPI performance analysis tool. OMPI is MPI,
and you have to get a tool to work with it.)
BTW
if you are sending Nik's phone number, i like to get yours also. Just
in case Nik is not picking up his phone. :)
For now, you can just send Nik or me e-mail offline. Indeed, maybe
you, Nik, and I just take this offline.
Anyways
if there is anything i can do to contribute please do let me know? I
would love to a part of this great community.
Maybe some FAQ entries to help other users/developers benefit from your
experience once you've learned something you'd like to report.
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