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Fix WebGPU buffer segment offset alignment #27853

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Merged
guschmue merged 1 commit into from
Mar 27, 2026
Merged

Fix WebGPU buffer segment offset alignment #27853

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6 changes: 6 additions & 0 deletions onnxruntime/core/providers/webgpu/webgpu_context.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,12 @@ void WebGpuContext::Initialize(const WebGpuContextConfig& config) {
device_queue_ = device_.GetQueue();
// cache device limits
ORT_ENFORCE(Device().GetLimits(&device_limits_));
// Align maxStorageBufferBindingSize down to minStorageBufferOffsetAlignment so that
// buffer segment offsets are always properly aligned for WebGPU bind group creation.
if (device_limits_.minStorageBufferOffsetAlignment > 0) {
device_limits_.maxStorageBufferBindingSize -=
(device_limits_.maxStorageBufferBindingSize % device_limits_.minStorageBufferOffsetAlignment);
}
// cache device features
wgpu::SupportedFeatures supported_features;
Device().GetFeatures(&supported_features);
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