Commits on May 12, 2020

1. prov/rxd: Changing from a static to a dynamic av Implementation …

   The current implementation of rxd av is dependent on FI_OFI_RXD_MAX_PEERS
   environment variable which must be specified to determine the maximum
   number of peers that it can support.This also restricts the possibility of
   any new peers more than the intially specified count to join the communication
   at run time.
   This patch removes the dependence of the number of peers which can communicate
   via rxd on the environment variables by allowing expansion of the address vector
   and the peers stored per endpoint dynamically.
   
   As the peer list can grow dynamically upon an RTS event or an address insertion
   the endpoint needs to maintain its unique peer list indexed by a rxd_addr.
   Each endpoint also maintains a mapping between the fi_addr and the rxd_addr
   in order to access a peer during a send/inject operation. This is needed
   since the dg_addr/fi_addr in the AV may be shared across endpoints but
   each endpoint will have its own unique rxd_addr for a peer.
   
   data structures added:
   
   - rxd_ep->fi_rxdaddr_hash: Used to map fi_addr to a unique rxd_addr per endpoint.
   - rxd_ep->ep_rxdaddr_hash: To ensure that a peer endpoint is created only once
     for a peer_list.
   - rxd_ep->peer_pool	 : The peer list is implemented using bufpool.
   - rxd_av->ep_dgaddr_hash : A hash table to ensure unique entries into the dg_av.
   - rxd_av->util_av	 : To store the fi_addr-->dg_addr mapping
   
   Signed-off-by: Nikhil Nanal <[email protected]>

   

   nikhilnanal committed May 12, 2020
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