[Paddle] Add deterministic option in DotProductAttention

[Wong4j]

Description

The custormers need an option to enable deterministic Attention. Their usual setting is to turn on FLAGS_cudnn_deterministic=1. So, when user sets FLAGS_cudnn_deterministic=1, workspace optimization is enabled.

Fixes # (issue)

Type of change

• [ ] Documentation change (change only to the documentation, either a fix or a new content)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Infra/Build change
• [ ] Code refractor

Changes

Please list the changes introduced in this PR:

• Change A
• Change B

Checklist:

• [x] I have read and followed the contributing guidelines
• [x] The functionality is complete
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[cyanguwa]

Hi @Wong4j , could you use the same environment variable name as in PyTorch please? NVTE_FUSED_ATTN_FORCE_WORKSPACE_OPT. Just so we are more consistent across TE.

https://github.com/NVIDIA/TransformerEngine/blob/6ee92c4bcfdc78bd0c3c29bbbaf3c02d1fcacd51/transformer_engine/pytorch/attention.py#L4053-L4067

Thanks.

[Wong4j]

@cyanguwa The environment variable names are already consistent. I just copied this part from pytorch. The only difference is that in paddle, self.deterministic is turned on by self.deterministic = bool(int(os.getenv("FLAGS_cudnn_deterministic", "0"))). This is the way customers are used to doing it. While in pytorch, it's self.deterministic = (not bool(int(os.getenv("NVTE_ALLOW_NONDETERMINISTIC_ALGO", "1"))) or torch.are_deterministic_algorithms_enabled())

[zlsh80826]

/te-ci paddle

[jeng1220]

@Wong4j will implement NVTE_ALLOW_NONDETERMINISTIC_ALGO in this PR.

[zlsh80826]

/te-ci paddle

[zlsh80826]

/te-ci paddle

[jeng1220]

LGTM

[jeng1220]

@cyanguwa , Could you please merge the code if anything looks fine?