Opened 12 years ago
Closed 12 years ago
#4695 closed Feature Requests (wontfix)
Exposing packed_iarchive::position()
| Reported by: | Owned by: | Matthias Troyer | |
|---|---|---|---|
| Milestone: | Boost 1.46.0 | Component: | mpi |
| Version: | Boost 1.44.0 | Severity: | Optimization |
| Keywords: | Cc: |
Description
I'm transferring variable number of packed objects (of same datatype) using isend/recv. (I'm new to MPI, so I might be wrong -- but is it true that for multiple isends with the same message tag the received message would contain a concatenation?)
Then I'm reading objects out of the buffer using packed_iarchive. Because their number is not known, I need a way to know if I read all objects from archive. packed_iprimitive already has position field.
Is it worth to make position() publicly accessible? The patch against trunk is attached.
Attachments (1)
Change History (5)
by , 12 years ago
| Attachment: | iprimitive_position.diff added |
|---|
comment:1 by , 12 years ago
| Type: | Bugs → Feature Requests |
|---|
comment:2 by , 12 years ago
| Owner: | changed from to |
|---|---|
| Status: | new → assigned |
comment:3 by , 12 years ago
| Milestone: | To Be Determined → Boost-1.46.0 |
|---|
comment:4 by , 12 years ago
| Resolution: | → wontfix |
|---|---|
| Status: | assigned → closed |
No, the messages will not be concatenated but each one will have to be received separately by MPI. When you packed the elements you know how many have arrived. a call to probe() returns a status object that contains the number of elements in a message. This shouldbe sufficient for your purpose.
add position() to packed_iprimitive and binary_buffer_iprimitive