OS X (Snow Leopard) ラップトップで C++ で並列コードを書いており、memchecker でデバッグしようとしています。以下を使用して、valgrind をサポートする OpenMPI のビルドに成功しましたconfigure --prefix=/opt/openmpi-1.4.3/ --enable-debug --enable-memchecker --with-valgrind=/opt/valgrind-3.6.0/ FFLAGS=-m64 F90FLAGS=-m64(Fortran フラグは無視してください。これは、私の Fortran コンパイラが GCC からのものであるためです)。
アプリケーションを実行すると
mpirun -np 2 valgrind --suppressions=/opt/openmpi-1.4.3/share/openmpi/openmpi-valgrind.supp --leak-check=yes --dsymutil=yes ./program
Valgrind から大量の警告が表示されます (ほとんどの警告は、最後のヒープ サマリーからのものです)。以下に警告の小さなスニペットを含めました。彼らから得たのは、Valgrind が MPI ライブラリのメモリ リークと初期化されていない値を検出したということですが、私はそれにはあまり関心がありません。私が書いたコードからの警告が欲しい。OpenMPI が提供する抑制ファイルを使用して Valgrind を既に実行していますが、明らかにそれだけでは十分ではありません。OpenMPI ディストリビューションで検出された他のすべての警告を簡単に無視するにはどうすればよいですか? OS X で Valgrind を使用して OpenMPI デバッグ用の抑制ファイルを見つけることは可能ですか?
最初の警告は
==1531== Syscall param writev(vector[...]) points to uninitialised byte(s)
==1531== at 0x1014E16E2: writev (in /usr/lib/libSystem.B.dylib)
==1531== by 0x101AEA4C5: mca_oob_tcp_peer_send (in /opt/openmpi-1.4.3/lib/openmpi/mca_oob_tcp.so)
==1531== by 0x101AF0B88: mca_oob_tcp_send_nb (in /opt/openmpi-1.4.3/lib/openmpi/mca_oob_tcp.so)
==1531== by 0x101AC7F48: orte_rml_oob_send (in /opt/openmpi-1.4.3/lib/openmpi/mca_rml_oob.so)
==1531== by 0x101AC8AA1: orte_rml_oob_send_buffer (in /opt/openmpi-1.4.3/lib/openmpi/mca_rml_oob.so)
==1531== by 0x101B3489E: allgather (in /opt/openmpi-1.4.3/lib/openmpi/mca_grpcomm_bad.so)
==1531== by 0x101B3525D: modex (in /opt/openmpi-1.4.3/lib/openmpi/mca_grpcomm_bad.so)
==1531== by 0x1000A48E6: ompi_mpi_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000F7806: MPI_Init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100001AF2: main (main.cpp:34)
==1531== Address 0x101a8911b is 107 bytes inside a block of size 256 alloc'd
==1531== at 0x10002DB2D: realloc (vg_replace_malloc.c:525)
==1531== by 0x1012240B6: opal_dss_buffer_extend (in /opt/openmpi-1.4.3/lib/libopen- pal.0.dylib)
==1531== by 0x101225CF7: opal_dss_copy_payload (in /opt/openmpi-1.4.3/lib/libopen-pal.0.dylib)
==1531== by 0x101B347CA: allgather (in /opt/openmpi-1.4.3/lib/openmpi/mca_grpcomm_bad.so)
==1531== by 0x101B3525D: modex (in /opt/openmpi-1.4.3/lib/openmpi/mca_grpcomm_bad.so)
==1531== by 0x1000A48E6: ompi_mpi_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000F7806: MPI_Init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100001AF2: main (main.cpp:34)
実行後、ヒープ サマリーの小さなスニペットは次のようになります。
==1531== 88 bytes in 1 blocks are definitely lost in loss record 1,950 of 2,194
==1531== at 0x10002D915: malloc (vg_replace_malloc.c:236)
==1531== by 0x100073888: opal_obj_new (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073808: opal_obj_new_debug (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073C17: ompi_attr_create_keyval_impl (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073FCF: ompi_attr_create_keyval (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100077C96: create_comm (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x10007798A: ompi_attr_create_predefined (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000737CF: ompi_attr_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000A4840: ompi_mpi_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000F7806: MPI_Init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100001AF2: main (main.cpp:34)
...
==1531== 88 bytes in 1 blocks are definitely lost in loss record 1,952 of 2,194
==1531== at 0x10002D915: malloc (vg_replace_malloc.c:236)
==1531== by 0x100073888: opal_obj_new (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073808: opal_obj_new_debug (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073C17: ompi_attr_create_keyval_impl (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073FCF: ompi_attr_create_keyval (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x10014CEC5: PMPI_Keyval_create (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1065ACFE6: ???
==1531== by 0x10658867B: ???
==1531== by 0x10017A591: module_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100179985: mca_io_base_file_select (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100089D55: ompi_file_open (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1000E1ED1: MPI_File_open (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531==
==1531== 88 bytes in 1 blocks are definitely lost in loss record 1,953 of 2,194
==1531== at 0x10002D915: malloc (vg_replace_malloc.c:236)
==1531== by 0x100073888: opal_obj_new (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073808: opal_obj_new_debug (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073C17: ompi_attr_create_keyval_impl (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x100073FCF: ompi_attr_create_keyval (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x10014CEC5: PMPI_Keyval_create (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)
==1531== by 0x1065A6210: ???
==1531== by 0x106597149: ???
==1531== by 0x106596AAB: ???
==1531== by 0x1065AD14C: ???
==1531== by 0x10658867B: ???
==1531== by 0x10017A591: module_init (in /opt/openmpi-1.4.3/lib/libmpi.0.dylib)