Tensor-parallel communication overlap with userbuffer backend #6362
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ericharper
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Apr 11, 2023
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| ub_tp_comm_overlap_cfg: null | ||
| # A yaml file with userbuffer communicator configurations. This file should provide `method`, `dtype`, `num_sm`, `num_splits`, | ||
| # `cga_size`, `num_splits`, `set_sm_margin`, and `aggregate` for the communicators to use custom settings. | ||
| # If the configuration file is not provided a default setting is used for all communicators. |
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Why is this a yaml file? Should it just be
ub_tp_comm_overlap_cfg:
method: blah
dtype: blah
...
?
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The two choices were either a config object or config file since there are two many UB related args
ericharper
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Apr 11, 2023
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| logging.info( | ||
| "Userbuffer tensor-parallel communication overlap is available with both Transformer Engine and sequence-parallelism." | ||
| ) |
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this should be .warning and maybe add ".. only available with ... Setting ub_tp_comm_overlap to True"
ericharper
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Apr 11, 2023
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| # Initialize userbuffer communicators. Initialization is done only once at the | ||
| # beginning of the first training step. | ||
| if self.initialize_ub: | ||
| input_shape = [ | ||
| self.cfg.get('encoder_seq_length') * self.cfg.get('micro_batch_size'), | ||
| self.cfg.get('hidden_size'), | ||
| ] | ||
| ub_cfg_file_name = self.cfg.get('ub_tp_comm_overlap_cfg', None) | ||
| if ub_cfg_file_name is not None: | ||
| try: | ||
| import yaml | ||
|
|
||
| with open(ub_cfg_file_name, 'r') as ub_cfg_file: | ||
| ub_cfgs = yaml.safe_load(ub_cfg_file) | ||
| except (ImportError, TypeError): | ||
| print("Fail to read ub_tp_comm_overlap config file.") | ||
| else: | ||
| ub_cfgs = None | ||
| te_module.initialize_ub( | ||
| shape=input_shape, | ||
| tp_size=self.cfg.get('tensor_model_parallel_size'), | ||
| use_fp8=self.cfg.get('fp8'), | ||
| ub_cfgs=ub_cfgs, | ||
| ) | ||
| self.initialize_ub = False |
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Can this go in the .setup method then? (since it is only called once at beginning of training)
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Also, can we make it a private method and then call the it?
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To add; I'm not a fan of how we're importing the whole file from TE (which isn't a part of the API)
ericharper
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Apr 11, 2023
Signed-off-by: Sangkug Lym <[email protected]>
erhoo82
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* add interfaces for tp_communication overlap * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Interface to provide custom userbuffer communicator settings by yaml file * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Jenkinsfile Signed-off-by: Sangkug Lym <[email protected]> --------- Signed-off-by: Sangkug Lym <[email protected]> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Eric Harper <[email protected]>
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What does this PR do ?
Add (1) interfaces to TE and initialized (2) process group setting to support tensor-parallel communication overlap with userbuffer backend.
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