TE integration via full TransformerLayer #1297
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Will merge this after the finegrained TE PR |
| "The mask will be discarded") | ||
| hidden_states, attention_mask = args | ||
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| fp8_format = Format.HYBRID # E4M3 during forward pass, E5M2 during backward pass |
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should instead accept neox_arg from the new te_fp8_format
| layer_number=i, | ||
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| elif layer_type in ["TE"]: |
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needs tested with PP and TP, since we'd be relying on two external codebases (deepspeed for PP, TE for TP) whose topologies probably don't play nicely together.
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| RUN DS_BUILD_FUSED_LAMB=1 DS_BUILD_FUSED_ADAM=1 DS_BUILD_TRANSFORMER=1 DS_BUILD_STOCHASTIC_TRANSFORMER=1 DS_BUILD_UTILS=1 \ | ||
| TORCH_CUDA_ARCH_LIST="8.0 9.0+PTX" \ | ||
| python -m pip install git+https://github.com/microsoft/DeepSpeed.git@v0.14.4 |
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this should probably instead be latest deeperspeed. Can't hardcode the arch list.
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This is a sketch of using the attention picking mechanism ("global", "flash", NEW: "TE") to use the high level TransformerLayer from TransformerEngine. This is more of a prototype to show that integration with deepspeed is possible and what perf to expect.
Things that work:
Many aspects are hardcoded, e.g. RoPE and activation checkpointing can not be reconfigured from the config files. #1282 is much more elaborate in that it exposes TE layers on a much lower level. Meanwhile this PR could serve as a benchmark, showing what is possible with TE on a classic GPT2 style network.
I kept the implementation as minimal as possible, there is room for further performance depending on the workload. There is e.g. sequence parallelism and different memory layouts.
The dockerfile now uses a later ngc pytorch container and installs a later deepspeed tag from source for compatibility.