Visible to Intel only — GUID: GUID-47D35E28-5CA5-4439-98E2-012E03DA3ADA
Fusion of Communication Operations
In some cases, it may be beneficial to postpone execution of communication operations and execute them all together as a single operation in a batch mode. This can reduce operation setup overhead and improve interconnect saturation.
oneCCL provides several knobs to enable and control such optimization:
The fusion is enabled by CCL_FUSION.
The advanced configuration is controlled by:
NOTE:
For now, this functionality is supported for allreduce operations only.