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Intel(R) oneAPI Collective Communications Library (oneCCL) 2021.13
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@nikitaxgusev nikitaxgusev released this 24 Jun 10:42
· 24 commits to master since this release
2021.13
0eb5987
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Learn about vigilant mode.

What's New:

  • Optimizations to limit the memory consumed by oneCCL
  • Optimizations to limit the number of file descriptors maintained opened by oneCCL.
  • Align the support for in-place for the Allgatherv and Reduce-scatter collectives to follow the same behavior as NCCL.
  • In particular, the Allgatherv collective is in place when:
  • send_buff == recv_buff + rank_offset, where rank_offset = sum (recv_counts[i]), for all I<rank.
  • Reduce-scatter is in-place when recv_buff == send_buff + rank *recv_count.
  • When using the environment variable CCL_WORKER_AFFINITY, oneCCL enforces the requirement that the length of the list should be equal to the number of workers.
  • Bug fixes.
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