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Description
c10d version 1F1B schedule.
We use
nstages
chunks to warm up the pipeline, then we enter a 1F1B stable phase, and lastly usenstages
to cool down the pipeline.Ref: https://arxiv.org/pdf/2104.04473.pdf.
API
Implementation Details
To avoid writing duplicated code, we modularize the original code in FillDrain implementation into
forward_one_chunk
andbackward_one_chunk
. Then the two different schedules can share these modular code and just focus on the schedule itself.Test
Added "schedule" option to test: