2.8.3-1

Optimization for Tree allreduce on A100.
Improve aggregation performance.
Use shared buffers for inter-node send/recv.
Add NVTX profiling hooks.
Accelerate alltoall connections by merging communication for all
channels.
Add support for one hop communication through NVLink, for faster
send/recv communication on cubemesh topologies like DGX-1.
Improve alltoall scheduling to better balance intra/inter node
communication.
Increase send/recv parallelism by 8x, each warp sending or
receiving to a different peer.
Net: move to v4.
Net: make flush operation asynchronous to accelerate alltoall.
Net: define maximum number of requests.
Fix hang when using LL128 protocol after 2^31 steps.
Fix #379 : topology injection failing when using less GPUs than
described in the XML.
Fix #394 : protocol mismatch causing hangs or crashes when using
one GPU per node.

pkg/debian/control.in

@@ -9,7 +9,7 @@ Package: libnccl${nccl:Major}
 Section: libs
 Architecture: ${pkg:Arch}
 Depends: ${misc:Depends}, ${shlibs:Depends}
-Description: NVIDIA Collectives Communication Library (NCCL) Runtime
+Description: NVIDIA Collective Communication Library (NCCL) Runtime
  NCCL (pronounced "Nickel") is a stand-alone library of standard collective
  communication routines for GPUs, implementing all-reduce, all-gather, reduce,
  broadcast, and reduce-scatter.
@@ -21,7 +21,7 @@ Package: libnccl-dev
 Section: libdevel
 Architecture: ${pkg:Arch}
 Depends: ${misc:Depends}, ${shlibs:Depends}, libnccl${nccl:Major} (= ${binary:Version})
-Description: NVIDIA Collectives Communication Library (NCCL) Development Files
+Description: NVIDIA Collective Communication Library (NCCL) Development Files
  NCCL (pronounced "Nickel") is a stand-alone library of standard collective
  communication routines for GPUs, implementing all-reduce, all-gather, reduce,
  broadcast, and reduce-scatter.