By default use mmap() to allocate memory for the symmetric heap.
It is safer and more portable choice than sysv and verbs.
Signed-off-by: Alex Mikheev <alexm@mellanox.com>
In order to have an effect, ibv_fork_init should be called in the
beginning of the verbs initialization flow - before the calls to the
ibv_create_qp and ibv_create_cq verbs.
These functions are called from the oob/ud code and by the time the
other verbs components (btl openib, pml yalla, ...) call ibv_fork_init,
it's too late. This commit forces the call to ibv_fork_init (if it's
requested) right at the beginning of all the components that are using
verbs.
(ibv_fork_init() can be safely called multiple times)
This commit also removes the btl_openib_want_fork_support mca parameter
and adds a new mca parameter instead - opal_verbs_want_fork_support.
Through this new parameter, fork support may be requested for ALL
components.
The default value for this parameter is set to 1.
Before this commit the btl_openib_want_fork_support parameter didn't
provide fork support for the openib btl if its value was set to 1.
(because when openib called ibv_fork_init, it was already after the
calls to ibv_create_* in oob/ud and thereofre it failed).
Use experimental verbs to allocate memory at fixed base
virtual address.
verbs will disqualify itself if shared_mr is disabled
or not supported and it is impossible to allocate memory
starting at fixed base virtual address.
verbs contig pages allocator did not guarantee fixed va, now it does.
(cherry picked from commit fd77ebd452)
Apply Jeff`s comments
Update with Jeff commits
(cherry picked from commit open-mpi/ompi-release@4dc487fc3d)
Use experimental verbs to allocate memory at fixed base
virtual address.
verbs will disqualify itself if shared_mr is disabled
or not supported and it is impossible to allocate memory
starting at fixed base virtual address.
verbs contig pages allocator did not guarantee fixed va, now it does.
Added use_hp flag in sshmem/sysv variable to control huge page usage;
Added shared_mr sshmem/verbs;
Both paraemetes are set in auto.
Fix help messages
fixed by Igor, reviewed by @miked-mellanox and @alex-mikheev
check for possibility of heap2heap copy was incorrect
in case when shared heaps have different virtual
addresses on same host.
It seems that ibv_exp_reg_mr() on CIB cards may return
different VAs for heap on same node. On CX3 addresses are
the same.
reviewed by miked
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r31969.
new OFED changed struct layout and static assignment caused segv.
detect struct new layout and use dynamic assignment
fixed by AlexM, reviewed by Miked
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r31502.
Use only contig allocator if shared_mr() is not supported
Fixes ibv_exp_reg_mr() parameters passing.
Fixes incorrect handling of sshmem_verbs_hca_name option.
fixed by AlexM, reviewed by Mike
cmr=v1.8.1:reviewer=ompi-rm1.8
This commit was SVN r31379.
- similar to opal/shmem
- next step is some refactoring and merge into opal/shmem
Developed by Igor, reviewed by AlexM, MikeD
This commit fixes trac:4261.
This commit was SVN r30855.
The following Trac tickets were found above:
Ticket 4261 --> https://svn.open-mpi.org/trac/ompi/ticket/4261
