[ET-VK][conv1d] Implement height-packed depthwise conv1d operator#18548
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SS-JIA merged 2 commits intogh/SS-JIA/494/origfrom Mar 27, 2026
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[ET-VK][conv1d] Implement height-packed depthwise conv1d operator#18548SS-JIA merged 2 commits intogh/SS-JIA/494/origfrom
SS-JIA merged 2 commits intogh/SS-JIA/494/origfrom
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Pull Request resolved: #18333 Implement a depthwise conv1d operator using height-packed layout where channels are the packed dimension (WHCN dim 1). Depthwise conv applies a separate filter to each channel independently (groups=C), so 4 channels can be processed in parallel using element-wise vec4 FMA over kernel positions. Thread mapping: X=C/4, Y=L_out, Z=N. Each thread computes one output texel (4 channels at one spatial position). Inner loop iterates over kernel positions K with bounds-checked input access for padding. Weight [C,1,K] is prepacked as channels-packed so each vec4 load gives 4 channels' weights at one kernel position. Supports both buffer and texture3d storage, fp32/fp16, optional bias, and arbitrary stride/padding/dilation. Registered as et_vk.conv1d_dw.default (standalone custom op). Performance on Adreno 750 (S24): - [1,128,4096] K=31 buffer f16: 231 GFLOP/s - [1,128,4096] K=31 buffer f32: 155 GFLOP/s - [1,512,2048] K=5 buffer f32: 66 GFLOP/s ghstack-source-id: 358903219 @exported-using-ghexport Differential Revision: [D97344091](https://our.internmc.facebook.com/intern/diff/D97344091/)
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18548
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…rt pipeline Pull Request resolved: #18334 Integrate the new height-packed conv1d_pw and conv1d_dw operators into the aten.convolution.default dispatch path so they are automatically used during model export. In op_registry.py, add a pick_conv_storage function that inspects the convolution node at partition time. For 1D convolutions where the op is pointwise (kernel_size=1) or depthwise (groups=C_in) and channels are 4-aligned, it selects HEIGHT_PACKED_TEXTURE for input/output instead of the default CHANNELS_PACKED_TEXTURE. All other cases (conv2d, grouped conv1d with K>1, unaligned channels) retain channels-packed behavior. In Convolution.cpp, add a height-packed routing block at the top of the conv1d path. When the input tensor is height-packed, it dispatches to et_vk.conv1d_pw.default or et_vk.conv1d_dw.default via VK_GET_OP_FN. Falls through to the existing channels-packed add_conv1d_node path otherwise. ghstack-source-id: 358903217 @exported-using-ghexport Differential Revision: [D97344090](https://our.internmc.facebook.com/intern/diff/D97344090/)
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #18333 by @SS-JIA
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/495/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/495/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/494/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/495/orig
Differential Revision: D97344091
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