[petsc-dev] Uninitialized values with MUMPS

[Stefano Zampini]

Have you ever noticed this from KSP tutorial ex52? I'm wondering whether it
could be related with PETSc interface to MUMPS or it is a problem on the
MUMPS side. The valgrind error come out once the first time the KSP is
solved, then disappear if KSPSolve is repeatedly called.

==31042== Command: ./ex52 -use_mumps_lu
==31042== Parent PID: 31041
==31042==
==31042== Syscall param writev(vector[...]) points to uninitialised byte(s)
==31042==    at 0x70C761B: writev (writev.c:51)
==31042==    by 0x8262108: MPIDU_Sock_writev (sock_immed.i:610)
==31042==    by 0x824B0DB: MPIDI_CH3_iSendv (ch3_isendv.c:84)
==31042==    by 0x823F4F2: MPIDI_CH3_PktHandler_RndvClrToSend
(ch3u_rndv.c:249)
==31042==    by 0x824C417: MPIDI_CH3I_Progress_handle_sock_event
(ch3_progress.c:453)
==31042==    by 0x824C4D7: MPIDI_CH3i_Progress_test (ch3_progress.c:95)
==31042==    by 0x82A9AAF: MPIR_Test_impl (test.c:50)
==31042==    by 0x82A9B88: PMPI_Test (test.c:151)
==31042==    by 0x8224829: mpi_test (testf.c:200)
==31042==    by 0x61A8805: __dmumps_comm_buffer_MOD_dmumps_4
(dmumps_comm_buffer.F:635)
==31042==    by 0x61A8D83: __dmumps_comm_buffer_MOD_dmumps_62
(dmumps_comm_buffer.F:554)
==31042==    by 0x6230D6E: dmumps_242_ (dmumps_part2.F:739)
==31042==  Address 0x9d0af38 is 8 bytes inside a block of size 336 alloc'd
==31042==    at 0x4C2B6CD: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31042==    by 0x61AAE8F: __dmumps_comm_buffer_MOD_dmumps_2
(dmumps_comm_buffer.F:175)
==31042==    by 0x61AB27C: __dmumps_comm_buffer_MOD_dmumps_55
(dmumps_comm_buffer.F:123)
==31042==    by 0x6186B64: dmumps_301_ (dmumps_part8.F:989)
==31042==    by 0x61FBA10: dmumps_ (dmumps_part1.F:665)
==31042==    by 0x60DE3FB: dmumps_f77_ (dmumps_part3.F:6651)
==31042==    by 0x60B7219: dmumps_c (mumps_c.c:422)
==31042==    by 0x59AE73F: MatSolve_MUMPS (mumps.c:591)
==31042==    by 0x58B1DB7: MatSolve (matrix.c:3178)
==31042==    by 0x5CB6A19: PCApply_LU (lu.c:198)
==31042==    by 0x5C1E9DE: PCApply (precon.c:442)
==31042==    by 0x5E0FE44: KSP_PCApply (kspimpl.h:227)


-- 

Ph. D. Stefano Zampini
CINECA
SuperComputing Applications and Innovations Department - SCAI
Via dei Tizii, 6 00185 Roma - ITALY
------------------------------------------------------------------------------------------------------------------------
Email: s.zampini at cineca.it
SkypeID: stefano.zampini
GoogleTalk: stefano.zampini at gmail.com
Tel: +39 06.44486.707
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