add onnx dequantize linear channel wise pattern for NPU #30265
+92
−8
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Details:
when DequantizeLinear OP met requirements of NPU (sym INT4, channel-wised Quantization) the performance raised a lot
This PR is going to optimize the decomposition OPs in ONNX frontend (DequantizeLinear) to match the NPU optimize pattern, before this PR, the INT4 phi3 onnx model using NPUW runs:
1st token 8000ms, 2nd token 9040ms, 3rd+ token avg 4000ms
apply this PR, the same model could reach to:
1st token 3400ms, 2nd token 3400ms, 3rd+ token avg 250ms
16x speed up in NPUW for phi3 model