Outubro 2008
Prof. Ismael H. F. Santos -  ismael@tecgraf.puc-rio.br                                                          2
Multicomputer Operating Systems (3)
nRelation between blocking, buffering, and reliable communications.
Necessary
No
Block sender until message delivered
Necessary
No
Block sender until message received
Not necessary
No
Block sender until message sent
Not necessary
Yes
Block sender until buffer not full
Reliable comm. guaranteed?
Send buffer
Synchronization point