2.20.3-1

Add support for alternating rings, allow for cross-nic rings without
cross-rail communication.
Add support for user buffer registration for network send/recv.
Optimize aggregated operations to better utilize all channels.
Add flattening for BCM PCI gen5 switches.
Add support for inter-node NVLink communication
Add support for port fusion in NET/IB.
Add support for ReduceScatter and AllGather using Collnet.
Update net API to v8.
Fix hang during A2A connection.

src/device/generate.py

@@ -74,11 +74,11 @@ else:
 ################################################################################
 
 algos_of_coll = {
-  "AllGather":     ["RING","NVLS"],
+  "AllGather":     ["RING","COLLNET_DIRECT","NVLS"],
   "AllReduce":     all_algos,
   "Broadcast":     ["RING"],
   "Reduce":        ["RING"],
-  "ReduceScatter": ["RING","NVLS"],
+  "ReduceScatter": ["RING","COLLNET_DIRECT","NVLS"],
   "SendRecv":      [None]
 }