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Removed functions iterating over tensors from torch compilation process #224

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@jczaja jczaja commented Sep 25, 2024

Problem:
Recently from dependencies of tgi-gaudi project some torch compile graph breaks were event out and it made some torch compiled graphs much bigger and more memory consuming which in some models could led to Device out-of-memory.

Solution:
Torch compiled graphs that wer causing Device OOM behaviour where related to having loops inside of them that where processing lots of tensors. Those functions with loops were excluded from torch compilation process.

@@ -92,7 +92,6 @@ def biggest_single_chunk(offset):
return 0


@torch_compile_for_eager

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why don't use torch._dynamo.graph_break() in place of mark_step instead of removing compilation of graph?
same question applies to all below cases

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does the change cause the ops within the function to be executed eagerly?

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@jczaja jczaja Sep 26, 2024

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does the change cause the ops within the function to be executed eagerly?

I assume(I have not run logging of fallback to eager events) that functions excluded from torch compile regions (as done in this PR) are now running eager e.g. pytorch ops from code that got torch compile decorator discarded are running eager .

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In some of internal testing it was revealed that excluding those functions(as in this PR) from torch compile region did not have an impact on performance or accuracy.

@jczaja jczaja requested a review from bsochack September 27, 2024 14:12
@mandy-li mandy-li requested review from schoi-habana and removed request for bsochack October 1, 2024 17:59
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lgtm

@tthakkal tthakkal requested a review from mandy-li October 15, 2024 21:19
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4 participants