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[NPUW] Phi-3 2K accuracy fix #32426

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Merged
merged 6 commits into from
Oct 22, 2025
Merged

[NPUW] Phi-3 2K accuracy fix #32426

merged 6 commits into from
Oct 22, 2025

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@AsyaPronina
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@AsyaPronina AsyaPronina commented Oct 15, 2025 •
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Details:

  • Added Phi3SlidingMask pass that replaces formula :
1. Range(0, atten_mask_len) <= (Range(past_kv_len, atten_mask_len).T - sliding_window)
2. Range(0, atten_mask_len) > (Range(past_kv_len, atten_mask_len).T - sliding_window)
3. Result = 1 | 2

to

 1. Range(0, atten_mask_len) <= (position_ids.T - sliding_window)
 2. Range(0, atten_mask_len) > (Range(past_kv_len, atten_mask_len).T - sliding_window)
 3. Intermediate_result_1 = 1 | 2
 4. Range(0, atten_mask_len) <= (Range(past_kv_len, atten_mask_len).T - sliding_window)
 5. Range(0, atten_mask_len) >= past_kv_len
 6.  Intermediate_result_2 = 4 & 5
 7. Result = Intermediate_result_1 | Intermediate_result_2
 8. To clean from attention to padding tokens: Result |= !(attention_mask[past_kv_len, atten_mask_len]).T

to create correct final sliding window mask for left-padded present tokens and right-padded past ones

Tickets:

@AsyaPronina AsyaPronina requested review from a team as code owners October 15, 2025 17:40
@github-actions github-actions bot added category: NPU OpenVINO NPU plugin category: NPUW NPUW plugin labels Oct 15, 2025
@AsyaPronina AsyaPronina force-pushed the npuw_fix_phi3_sliding_mask branch from 2a1bacc to 62a8876 Compare October 15, 2025 17:48
@dmatveev dmatveev added this to the 2025.4 milestone Oct 15, 2025
@dmatveev dmatveev self-assigned this Oct 15, 2025
dmatveev
dmatveev reviewed Oct 15, 2025
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Please try to minimize the diff

src/plugins/intel_npu/src/plugin/npuw/llm_compiled_model.cpp Outdated
public:
OPENVINO_MATCHER_PASS_RTTI("npuw::LLMCompiledModel::Phi3SlidingMask");

explicit Phi3SlidingMask() {
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it seems in this particular case explicit is not required.

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Fixed, thanks!

src/plugins/intel_npu/src/plugin/npuw/llm_compiled_model.cpp Outdated
Comment on lines 480 to 405
// Searching for Phi3 sliding mask pattern to extend it to work with right-padded
// past tokens and left-padded present tokens.
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Suggested change
// Searching for Phi3 sliding mask pattern to extend it to work with right-padded
// past tokens and left-padded present tokens.
// Search for the Phi3 sliding mask pattern to extend it to work with right-padded
// past tokens and left-padded present tokens.

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Fixed, thanks!

src/plugins/intel_npu/src/plugin/npuw/llm_compiled_model.cpp
Comment on lines +495 to +420
// past tokens = 3
// present tokens = 5 (starting with current_pos_id = 3)
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out of curiosity, how can we get 5 present tokens with 3 past tokens?

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@AsyaPronina AsyaPronina Oct 15, 2025 •
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It can be done in speculative decoding case, for example
However, 3 and 5 case was described as general simple case for dynamic shapes

src/plugins/intel_npu/src/plugin/npuw/llm_compiled_model.cpp
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If you introduced a new pass, why there are changes to the existing code? Have you also moved stuff around?
Since the changes are quite complex nowadays, I'd avoid the unnecessary diffs to focus only on the relevant ones.

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Sure, will do!

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Fixed, thanks!

@dmatveev dmatveev changed the title [NPUW] Patch Phi-3 Sliding window mask to work with different paddings of past and present tokens [NPUW] Phi-3 2K accuracy fix Oct 17, 2025
@AsyaPronina AsyaPronina force-pushed the npuw_fix_phi3_sliding_mask branch 3 times, most recently from f7e27e9 to 4fed7fb Compare October 20, 2025 09:01
dmatveev
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src/plugins/intel_npu/src/plugin/npuw/llm_compiled_model.cpp Outdated

LOG_DEBUG("Try patch Phi-3 sliding window mask, if it exists.");
patch_phi3_sliding_mask(kvcache_model);
ov::save_model(kvcache_model, "swa_patched.xml");
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This shouldn't be here

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Fixed, thanks!

@AsyaPronina AsyaPronina force-pushed the npuw_fix_phi3_sliding_mask branch 4 times, most recently from 6fadef6 to 8b1a295 Compare October 21, 2025 14:17
@AsyaPronina AsyaPronina force-pushed the npuw_fix_phi3_sliding_mask branch from c4bb342 to b142dc0 Compare October 21, 2025 15:26
@dmatveev dmatveev added this pull request to the merge queue Oct 22, 2025
Merged via the queue into openvinotoolkit:master with commit 31ba12a Oct 22, 2025
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@dmatveev dmatveev deleted the npuw_fix_phi3_sliding_mask branch October 22, 2025 12:43
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@dmatveev dmatveev dmatveev left review comments

@smirnov-alexey smirnov-alexey smirnov-alexey approved these changes

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category: NPU OpenVINO NPU plugin category: NPUW NPUW plugin Code Freeze

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@AsyaPronina @dmatveev @smirnov-alexey