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[WIP][js/webgpu] Optimize matmulnbits #22360

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[WIP][js/webgpu] Optimize matmulnbits #22360

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@qjia7 qjia7 commented Oct 9, 2024 •
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Description

This PR further optimizes matmulnbits specially for iGPUs. The phi3 demo becomes ~12 tokens/second from ~8 tokens on iGPUs.

Some todos:

  1. Make the optimization more general, Remove the blockSize = 32 limitation.
  2. Tune the parameter, such as workgroupSize, components size (currently only support components = 1), to see the performance change.
  3. remove duplicated code to simple the shader.

@qjia7
[js/webgpu] Optimize matmulnbits
93bd839 
This PR further optimizes matmulnbits specially for iGPUs.
The phi3 demo becomes ~12 tokens/second from ~8 tokens on iGPUs.
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