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From: Chris Chambreau (chcham_at_[hidden])
Date: 2007-03-30 16:49:12

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Chris Chambreau wrote:
> Hi Folks,
> It's great to hear that people are interested in mpiP!
> Currently, I am configuring mpiP on x86_64 with gcc 3.4.4 with -O2 and
> without libunwind.
> When running some simple tests, I'm having good luck using both mpiP
> stack walking and libunwind when compiling with gcc and -O2. However,
> it looks to me like compiling the mpiP library or an application with
> -O3 will cause stack walking with the mpiP-implemented stack walking
> code to segfault. If I configure mpiP to use libunwind and compile my
> application with -O3, some libunwind calls fail and some MPI call sites
> are not recorded. It looks to me like building and running with -O3
> with the Intel compiler (v9.1) is successful.
> At this point the work-around for gcc appears to be building with -O2.
> Hopefully we can get this sorted out by the next mpiP release.
> The issue that George points out with the failed address lookup could be
> due either to not compiling with -g or with the version of binutils he
> is using. I've successfully used binutils versions 2.15.92 and 2.16.1,
> but have run into some issues with binutils-2.17.
> We don't hear all that much from mpiP users, so if you run into annoying
> issues with mpiP that you'd like sorted out or just have general
> questions or comments about the tool, please let us know at
> mpip-help_at_[hidden] .
> Thanks!
> -Chris