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[ET-VK][ez] Handle zero-element tensors when building Vulkan graph #11984

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Merged
merged 4 commits into from
Jun 26, 2025
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[ET-VK][ez] Handle zero-element tensors when building Vulkan graph #11984

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[ET-VK][ez] Handle zero-element tensors when building Vulkan graph
SS-JIA Jun 25, 2025
4301387
Update on "[ET-VK][ez] Handle zero-element tensors when building Vulk…
SS-JIA Jun 25, 2025
0cf946c
Update on "[ET-VK][ez] Handle zero-element tensors when building Vulk…
SS-JIA Jun 25, 2025
bc7ce16
Update on "[ET-VK][ez] Handle zero-element tensors when building Vulk…
SS-JIA Jun 26, 2025
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30 changes: 17 additions & 13 deletions backends/vulkan/serialization/vulkan_graph_serialize.py
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Original file line number Diff line number Diff line change
Expand Up @@ -191,19 +191,23 @@ def serialize_constant_tensors(

current_offset = len(raw_bytes)
for tensor in const_tensors:
array_type = ctypes.c_char * tensor.untyped_storage().nbytes()
array = ctypes.cast(
tensor.untyped_storage().data_ptr(),
ctypes.POINTER(array_type),
).contents

tensor_bytes = bytes(array)
# Pad the tensor bytes to the next 16 byte boundary
raw_bytes += tensor_bytes
raw_bytes += b"\x00" * padding_required(len(tensor_bytes))

vk_graph.constants.append(VkBytes(current_offset, len(tensor_bytes)))
current_offset += aligned_size(len(tensor_bytes))
if tensor.numel() == 0:
vk_graph.constants.append(VkBytes(current_offset, 0))
continue
else:
array_type = ctypes.c_char * tensor.untyped_storage().nbytes()
array = ctypes.cast(
tensor.untyped_storage().data_ptr(),
ctypes.POINTER(array_type),
).contents

tensor_bytes = bytes(array)
# Pad the tensor bytes to the next 16 byte boundary
raw_bytes += tensor_bytes
raw_bytes += b"\x00" * padding_required(len(tensor_bytes))

vk_graph.constants.append(VkBytes(current_offset, len(tensor_bytes)))
current_offset += aligned_size(len(tensor_bytes))


def serialize_custom_shaders(
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