print bandwidth in benchmark

modify print to log warn

control usm and p2p by env variable

default is p2p,  enable usm:
     export CCL_DG2_USM=1

control usm and p2p by env variable

default is p2p,  enable usm:
    export CCL_DG2_USM=1

enable p2p allreduce

fix_fdset_buffer_overflow_issue

Revert "optimize req_workgroup calculate" for hang issue

This reverts commit 20bfd0e.

Intel(R) oneAPI Collective Communications Library (oneCCL) 2021.14 (u…

…xlfoundation#144)

Merge pull request uxlfoundation#135 from nikitaxgusev/release/ccl_20…

…21.13.1

Intel(R) oneAPI Collective Communications Library (oneCCL) 2021.13.1

Merge pull request uxlfoundation#125 from nikitaxgusev/release/ccl_20…

…21.13

Intel(R) oneAPI Collective Communications Library (oneCCL) 2021.13