Looks to me like a false positive - we do malloc some space, and do access different parts of it. However, it looks like we are inside the space at all times.
I’d suppress it > On Jul 23, 2015, at 12:47 AM, Schlottke-Lakemper, Michael > <m.schlottke-lakem...@aia.rwth-aachen.de> wrote: > > Hi folks, > > recently we’ve been getting a Valgrind error in PMPI_Init for our suite of > regression tests: > > ==5922== Invalid read of size 4 > ==5922== at 0x61CC5C0: opal_os_dirpath_create (in > /aia/opt/openmpi-1.8.7/lib64/libopen-pal.so.6.2.2) > ==5922== by 0x5F207E5: orte_session_dir (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x5F34F04: orte_ess_base_app_setup (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x7E96679: rte_init (in > /aia/opt/openmpi-1.8.7/lib64/openmpi/mca_ess_env.so) > ==5922== by 0x5F12A77: orte_init (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x509883C: ompi_mpi_init (in > /aia/opt/openmpi-1.8.7/lib64/libmpi.so.1.6.2) > ==5922== by 0x50B843A: PMPI_Init (in > /aia/opt/openmpi-1.8.7/lib64/libmpi.so.1.6.2) > ==5922== by 0xEBA79C: ZFS::run() (in > /aia/r018/scratch/mic/.zfstester/.zacc_cron/zacc_cron_r9063/zfs_gnu_production) > ==5922== by 0x4DC243: main (in > /aia/r018/scratch/mic/.zfstester/.zacc_cron/zacc_cron_r9063/zfs_gnu_production) > ==5922== Address 0x710f670 is 48 bytes inside a block of size 51 alloc'd > ==5922== at 0x4C29110: malloc (in > /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) > ==5922== by 0x61CC572: opal_os_dirpath_create (in > /aia/opt/openmpi-1.8.7/lib64/libopen-pal.so.6.2.2) > ==5922== by 0x5F207E5: orte_session_dir (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x5F34F04: orte_ess_base_app_setup (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x7E96679: rte_init (in > /aia/opt/openmpi-1.8.7/lib64/openmpi/mca_ess_env.so) > ==5922== by 0x5F12A77: orte_init (in > /aia/opt/openmpi-1.8.7/lib64/libopen-rte.so.7.0.6) > ==5922== by 0x509883C: ompi_mpi_init (in > /aia/opt/openmpi-1.8.7/lib64/libmpi.so.1.6.2) > ==5922== by 0x50B843A: PMPI_Init (in > /aia/opt/openmpi-1.8.7/lib64/libmpi.so.1.6.2) > ==5922== by 0xEBA79C: ZFS::run() (in > /aia/r018/scratch/mic/.zfstester/.zacc_cron/zacc_cron_r9063/zfs_gnu_production) > ==5922== by 0x4DC243: main (in > /aia/r018/scratch/mic/.zfstester/.zacc_cron/zacc_cron_r9063/zfs_gnu_production) > ==5922== > > What is weird is that it seems to depend on the pbs/torque session we’re in: > sometimes the error does not occur and all and all tests run fine (this is in > fact the only Valgrind error we’re having at the moment). Other times every > single test we’re running has this error. > > Has anyone seen this or might be able to offer an explanation? If it is a > false-positive, I’d be happy to suppress it :) > > Thanks a lot in advance > > Michael > > P.S.: This error is not covered/suppressed by the default ompi suppression > file in $PREFIX/share/openmpi. > > > -- > Michael Schlottke-Lakemper > > SimLab Highly Scalable Fluids & Solids Engineering > Jülich Aachen Research Alliance (JARA-HPC) > RWTH Aachen University > Wüllnerstraße 5a > 52062 Aachen > Germany > > Phone: +49 (241) 80 95188 > Fax: +49 (241) 80 92257 > Mail: m.schlottke-lakem...@aia.rwth-aachen.de > <mailto:m.schlottke-lakem...@aia.rwth-aachen.de> > Web: http://www.jara.org/jara-hpc <http://www.jara.org/jara-hpc> > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/07/27303.php
