This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "MPICH primary repository". The branch, master has been updated via 1182a62aaa1b016f9fefcf78485b6b80b765eb47 (commit) from 1ffd39ba42b3ef1c6ae7e09484d7257b756bfab1 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- http://git.mpich.org/mpich.git/commitdiff/1182a62aaa1b016f9fefcf78485b6b80b7... commit 1182a62aaa1b016f9fefcf78485b6b80b765eb47 Author: Xin Zhao <[email protected]> Date: Fri Jul 19 02:18:07 2013 -0500 fix bug of zero-byte shared window allocation. In MPIDI_CH3I_Win_allocate_shared, if the size of shared memory segment is 0, we just set window's base to NULL, do not allocate shared memory segment and mutex memory region. In MPIDI_CH3I_SHM_Win_free, we detach the shared memory segment and mutex memory region only when the size of shared memory segment is not 0. Signed-off-by: Pavan Balaji <[email protected]> diff --git a/src/mpid/ch3/channels/nemesis/src/ch3_rma_shm.c b/src/mpid/ch3/channels/nemesis/src/ch3_rma_shm.c index 09b101b..08c6a1d 100644 --- a/src/mpid/ch3/channels/nemesis/src/ch3_rma_shm.c +++ b/src/mpid/ch3/channels/nemesis/src/ch3_rma_shm.c @@ -68,16 +68,19 @@ int MPIDI_CH3_SHM_Win_free(MPID_Win **win_ptr) if ((*win_ptr)->shm_allocated) { /* free shm_base_addrs that's only used for shared memory windows */ MPIU_Free((*win_ptr)->shm_base_addrs); - /* detach from shared memory segment */ - mpi_errno = MPIU_SHMW_Seg_detach((*win_ptr)->shm_segment_handle, (char **)&(*win_ptr)->shm_base_addr, + + if ((*win_ptr)->shm_segment_len > 0) { + /* detach from shared memory segment */ + mpi_errno = MPIU_SHMW_Seg_detach((*win_ptr)->shm_segment_handle, (char **)&(*win_ptr)->shm_base_addr, (*win_ptr)->shm_segment_len); - if (mpi_errno) MPIU_ERR_POP(mpi_errno); + if (mpi_errno) MPIU_ERR_POP(mpi_errno); - MPIU_SHMW_Hnd_finalize(&(*win_ptr)->shm_segment_handle); + MPIU_SHMW_Hnd_finalize(&(*win_ptr)->shm_segment_handle); + } } /* Free shared process mutex memory region */ - if ((*win_ptr)->shm_mutex) { + if ((*win_ptr)->shm_mutex && (*win_ptr)->shm_segment_len > 0) { if ((*win_ptr)->comm_ptr->rank == 0) { MPIDI_CH3I_SHM_MUTEX_DESTROY(*win_ptr); diff --git a/src/mpid/ch3/channels/nemesis/src/ch3_win_fns.c b/src/mpid/ch3/channels/nemesis/src/ch3_win_fns.c index 138b473..8942ed2 100644 --- a/src/mpid/ch3/channels/nemesis/src/ch3_win_fns.c +++ b/src/mpid/ch3/channels/nemesis/src/ch3_win_fns.c @@ -133,6 +133,11 @@ static int MPIDI_CH3I_Win_allocate_shared(MPI_Aint size, int disp_unit, MPID_Inf (*win_ptr)->shm_segment_len += (*win_ptr)->sizes[i]; } + if ((*win_ptr)->shm_segment_len == 0) { + (*win_ptr)->base = NULL; + } + + else { mpi_errno = MPIU_SHMW_Hnd_init(&(*win_ptr)->shm_segment_handle); if (mpi_errno) MPIU_ERR_POP(mpi_errno); @@ -252,6 +257,7 @@ static int MPIDI_CH3I_Win_allocate_shared(MPI_Aint size, int disp_unit, MPID_Inf } (*win_ptr)->base = (*win_ptr)->shm_base_addrs[rank]; + } /* get the base addresses of the windows. Note we reuse tmp_buf from above since it's at least as large as we need it for this allgather. */ ----------------------------------------------------------------------- Summary of changes: src/mpid/ch3/channels/nemesis/src/ch3_rma_shm.c | 13 ++++++++----- src/mpid/ch3/channels/nemesis/src/ch3_win_fns.c | 6 ++++++ 2 files changed, 14 insertions(+), 5 deletions(-) hooks/post-receive -- MPICH primary repository