FWIW it's worth, it's a "bug" in valgrind. The manpage of mbind does not exactly match the kernel requirements on mbind parameters. And valgrind fails at respecting the manpage anyway. See https://bugs.kde.org/show_bug.cgi?id=280083 for the mess...
Brice Le 13/08/2011 15:07, Brice Goglin a écrit : > I think I am seeing this too on a custom program, so probably not your > application's fault. > Brice > > > > Le 13/08/2011 10:37, Gabriele Fatigati a écrit : >> >> >> Dearhwloc users and developers, >> >> I'm using hwloc 1.2 stable version Intel 11 compiled and checking my >> little application with valgrind 3.5. >> >> My app calls hwloc_set_area_membind_nodeset() function from a OpenMP >> thread: >> >> hwloc_set_area_membind_nodeset(topology, mem, 10000, nodeset, >> HWLOC_MEMBIND_BIND, HWLOC_MEMBIND_THREAD | HWLOC_MEMBIND_STRICT | >> HWLOC_MEMBIND_NOCPUBIND ) >> >> membind seems to work well, but valgrind give me a follow warning: >> >> ==2904== Syscall param mbind(nodemask) points to unaddressable byte(s) >> ==2904== at 0x4FF33C1: syscall6 (in /usr/lib64/libnuma.so.1) >> ==2904== by 0x4FF3436: mbind (in /usr/lib64/libnuma.so.1) >> ==2904== by 0x4C208AC: hwloc_linux_set_area_membind >> (topology-linux.c:1071) >> ==2904== by 0x4C1AC3E: hwloc_set_area_membind_nodeset (bind.c:396) >> ==2904== by 0x402165: bind_memory_tonode (main.c:97) >> ==2904== Address 0x5a64978 is 0 bytes after a block of size 8 alloc'd >> ==2904== at 0x4A05140: calloc (vg_replace_malloc.c:418) >> ==2904== by 0x4C20646: hwloc_linux_membind_mask_from_nodeset >> (topology-linux.c:996) >> ==2904== by 0x4C2083E: hwloc_linux_set_area_membind >> (topology-linux.c:1054) >> ==2904== by 0x4C1AC3E: hwloc_set_area_membind_nodeset (bind.c:396) >> ==2904== by 0x401CBB: bind_memory_tonode (main.c:97) >> >> valgrind has --tool=memcheck --leak-check=full exec flags. >> >> It give me the same warning also with just one byte memory bound. >> >> Is it a hwloc warning or my applications warning? >> >> Thanks in forward. >> >> >> >> >> >> -- >> Ing. Gabriele Fatigati >> >> HPC specialist >> >> SuperComputing Applications and Innovation Department >> >> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >> >> www.cineca.it <http://www.cineca.it> Tel: +39 >> 051 6171722 >> >> g.fatigati [AT] cineca.it <http://cineca.it> >> >> >> _______________________________________________ >> hwloc-users mailing list >> hwloc-us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >
