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alibaba--mnn/source/backend/opencl/execution/buffer/LayerNormBufExecution.cpp
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2026-07-13 13:33:03 +08:00

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//
// LayerNormBufExecution.cpp
// MNN
//
// Created by MNN on 2023/07/05.
// Copyright © 2018, Alibaba Group Holding Limited
//
#ifndef MNN_OPENCL_BUFFER_CLOSED
#include "backend/opencl/execution/buffer/LayerNormBufExecution.hpp"
namespace MNN {
namespace OpenCL {
LayerNormBufExecution::LayerNormBufExecution(const std::vector<Tensor*>& inputs, const MNN::Op* op, Backend* backend)
: CommonExecution(backend, op) {
mOpenCLBackend = static_cast<OpenCLBackend*>(backend);
auto runtime = mOpenCLBackend->getOpenCLRuntime();
const auto* layer_norm_param = op->main_as_LayerNorm();
mResource.reset(new LayernormResource);
if (nullptr != layer_norm_param->axis()) {
mResource->axis_size = layer_norm_param->axis()->size();
}
mResource->epsilon_ = layer_norm_param->epsilon();
mResource->group_ = layer_norm_param->group();
mResource->RMSNorm = layer_norm_param->useRMSNorm();
auto bufferUnitSize =
mOpenCLBackend->getPrecision() != BackendConfig::Precision_High ? sizeof(half_float::half) : sizeof(float);
auto kernel =
runtime->buildKernel("layernorm_buf", "layernorm_buf", {"-DLOCAL_SIZE=512"}, mOpenCLBackend->getPrecision());
OPENCL_CHECK_KERNEL_CTOR(kernel);
mResource->mMaxWorkGroupSize = static_cast<uint32_t>(runtime->getMaxWorkGroupSize(kernel));
mResource->has_gamma_beta_ = (layer_norm_param->gamma() && layer_norm_param->beta());
int gammasize = 0;
if (mResource->has_gamma_beta_) {
MNN_ASSERT(layer_norm_param->gamma()->size() == layer_norm_param->beta()->size());
gammasize = layer_norm_param->gamma()->size();
}
mResource->has_gamma_beta_ =
mResource->has_gamma_beta_ || (layer_norm_param->external() && layer_norm_param->external()->size() > 1 &&
layer_norm_param->external()->data()[1] > 0);
if (mResource->has_gamma_beta_ && gammasize == 0) {
gammasize = layer_norm_param->external()->data()[1] / sizeof(float);
}
auto staticMapAlloc = mOpenCLBackend->getStaticAllocatorMMap();
if (mResource->has_gamma_beta_) {
{
auto error = CL_SUCCESS;
int size = gammasize;
if (mOpenCLBackend->getRuntime()->hint().useCachedMmap && staticMapAlloc != nullptr) {
mResource->mGammaBuffer = staticMapAlloc.get()->allocBuffer(ALIGN_UP4(size) * bufferUnitSize);
} else {
mResource->mGammaBuffer.reset(new cl::Buffer(mOpenCLBackend->getOpenCLRuntime()->context(),
CL_MEM_READ_WRITE | CL_MEM_ALLOC_HOST_PTR,
ALIGN_UP4(size) * bufferUnitSize));
}
if (mOpenCLBackend->getRuntime()->hint().useCachedMmap <= 1) {
auto GammaPtrCL = mOpenCLBackend->getOpenCLRuntime()->commandQueue().enqueueMapBuffer(
*(mResource->mGammaBuffer.get()), true, CL_MAP_WRITE, 0, ALIGN_UP4(size) * bufferUnitSize, nullptr,
nullptr, &error);
const float* gamma_data = layer_norm_param->gamma()->data();
if (GammaPtrCL != nullptr && error == CL_SUCCESS) {
if (mOpenCLBackend->getPrecision() != BackendConfig::Precision_High) {
for (int i = 0; i < size; i++) {
((half_float::half*)GammaPtrCL)[i] = (half_float::half)(gamma_data[i]);
}
for (int i = size; i < ALIGN_UP4(size); i++) {
((half_float::half*)GammaPtrCL)[i] = (half_float::half)(0.0f);
}
} else {
::memset(GammaPtrCL, 0, ALIGN_UP4(size) * sizeof(float));
::memcpy(GammaPtrCL, gamma_data, size * sizeof(float));
}
} else {
MNN_ERROR("Map error GammaPtrCL == nullptr \n");
}
mOpenCLBackend->getOpenCLRuntime()->commandQueue().enqueueUnmapMemObject(*mResource->mGammaBuffer.get(),
GammaPtrCL);
}
}
{
auto error = CL_SUCCESS;
int size = gammasize;
if (mOpenCLBackend->getRuntime()->hint().useCachedMmap && staticMapAlloc != nullptr) {
mResource->mBetaBuffer = staticMapAlloc.get()->allocBuffer(ALIGN_UP4(size) * bufferUnitSize);
} else {
mResource->mBetaBuffer.reset(new cl::Buffer(mOpenCLBackend->getOpenCLRuntime()->context(),
CL_MEM_READ_WRITE | CL_MEM_ALLOC_HOST_PTR,
ALIGN_UP4(size) * bufferUnitSize));
}
if (mOpenCLBackend->getRuntime()->hint().useCachedMmap <= 1) {
auto BetaPtrCL = mOpenCLBackend->getOpenCLRuntime()->commandQueue().enqueueMapBuffer(
*(mResource->mBetaBuffer.get()), true, CL_MAP_WRITE, 0, ALIGN_UP4(size) * bufferUnitSize, nullptr,
nullptr, &error);
const float* beta_data = layer_norm_param->beta()->data();
if (BetaPtrCL != nullptr && error == CL_SUCCESS) {
if (mOpenCLBackend->getPrecision() != BackendConfig::Precision_High) {
for (int i = 0; i < size; i++) {
((half_float::half*)BetaPtrCL)[i] = (half_float::half)(beta_data[i]);
}
for (int i = size; i < ALIGN_UP4(size); i++) {
((half_float::half*)BetaPtrCL)[i] = (half_float::half)(0.0f);
}
} else {
::memset(BetaPtrCL, 0, ALIGN_UP4(size) * sizeof(float));
::memcpy(BetaPtrCL, beta_data, size * sizeof(float));
}
} else {
MNN_ERROR("Map error BetaPtrCL == nullptr \n");
}
mOpenCLBackend->getOpenCLRuntime()->commandQueue().enqueueUnmapMemObject(*mResource->mBetaBuffer.get(),
BetaPtrCL);
}
}
}
}
LayerNormBufExecution::LayerNormBufExecution(std::shared_ptr<LayernormResource> resource, const Op* op,
Backend* backend)
: CommonExecution(backend, op) {
mResource = resource;
mOpenCLBackend = (OpenCLBackend*)backend;
}
bool LayerNormBufExecution::onClone(Backend* bn, const Op* op, Execution** dst) {
if (!mValid) {
return false;
}
if (nullptr == dst) {
return true;
}
*dst = new LayerNormBufExecution(mResource, op, bn);
return true;
}
int LayerNormBufExecution::getLocalSize(int size, int maxGroupSize) {
int local_size = 1;
while (local_size * 2 <= maxGroupSize && local_size * 2 <= size) {
local_size *= 2;
}
return local_size;
}
ErrorCode LayerNormBufExecution::onEncode(const std::vector<Tensor*>& inputs, const std::vector<Tensor*>& outputs) {
Tensor* input = inputs[0];
Tensor* output = outputs[0];
auto runtime = ((OpenCLBackend*)backend())->getOpenCLRuntime();
auto MaxLocalSize =
std::min(std::min(runtime->getMaxWorkItemSizes()[0], mResource->mMaxWorkGroupSize), (uint32_t)256);
const auto layout = TensorUtils::getDescribe(input)->dimensionFormat;
bool isNC4HW4 = layout == MNN_DATA_FORMAT_NC4HW4;
std::vector<int> inputShape = tensorShapeFormat(input);
std::vector<int> outputShape = tensorShapeFormat(output);
int rank = inputs.at(0)->dimensions();
int outter_size = 1;
int inner_size = 1;
for (int i = 0; i < rank - mResource->axis_size; ++i) {
outter_size *= inputs.at(0)->length(i);
}
for (int i = rank - mResource->axis_size; i < rank; ++i) {
inner_size *= inputs.at(0)->length(i);
}
if (mResource->group_ > 1) {
outter_size = inputs[0]->length(0) * mResource->group_;
inner_size = 1;
for (int i = 1; i < rank; i++) {
inner_size *= inputs[0]->length(i);
}
inner_size /= mResource->group_;
}
if (isNC4HW4) {
inner_size = inputs.at(0)->length(1);
outter_size = 1;
for (int i = 0; i < rank; i++) {
if (i != 1) {
outter_size *= inputs.at(0)->length(i);
}
}
}
bool splitBinaryLN = (isNC4HW4 && inputs.size() == 2 && outputs.size() == 2);
int local_size;
std::string kernelName;
if (isNC4HW4) {
int channelUnit = UP_DIV(inner_size, 4);
local_size = getLocalSize(channelUnit, MaxLocalSize);
if (splitBinaryLN) {
// The second stage kernel (LayerNorm only)
kernelName = "layernorm_c4_buf";
} else {
kernelName = "layernorm_c4_buf";
}
} else {
local_size = getLocalSize(inner_size / 4, MaxLocalSize);
kernelName = "layernorm_buf";
}
std::set<std::string> buildOptions;
buildOptions.emplace("-DLOCAL_SIZE=" + std::to_string(local_size));
if (mResource->RMSNorm) {
buildOptions.emplace("-DRMSNORM");
}
if (mResource->has_gamma_beta_) {
buildOptions.emplace("-DGAMMA_BETA");
}
if (!isNC4HW4 && inner_size % 4 != 0) {
buildOptions.emplace("-DPACK_LEAVE");
}
if (splitBinaryLN) {
// ---------- Two-kernel SPLIT path ----------
int total_size_float = outter_size * inner_size;
int gws_x = UP_DIV(total_size_float, 4);
mUnits.resize(2);
// unit[0]: binary_add_c4_buf (1D + vload4, following binary_buf.cl pattern)
{
auto& u0 = mUnits[0];
std::set<std::string> addOpts;
if (total_size_float % 4 != 0) {
addOpts.emplace("-DPACK_LEAVE");
}
u0.kernel =
runtime->buildKernel("layernorm_buf", "binary_add_c4_buf", addOpts, mOpenCLBackend->getPrecision());
OPENCL_CHECK_KERNEL(u0.kernel);
std::vector<uint32_t> gwsVec = {(uint32_t)gws_x, 1u};
uint32_t maxWGS = static_cast<uint32_t>(runtime->getMaxWorkGroupSize(u0.kernel));
uint32_t aidx = 0;
cl_int aret = CL_SUCCESS;
aret |= u0.kernel->get().setArg(aidx++, gws_x);
aret |= u0.kernel->get().setArg(aidx++, openCLBuffer(inputs[0]));
aret |= u0.kernel->get().setArg(aidx++, openCLBuffer(inputs[1]));
aret |= u0.kernel->get().setArg(aidx++, openCLBuffer(outputs[0]));
aret |= u0.kernel->get().setArg(aidx++, total_size_float);
MNN_CHECK_CL_SUCCESS(aret, "setArg binary_add_c4_buf");
std::vector<uint32_t> lwsVec = localWS2DDefault(gwsVec, maxWGS, runtime, "binary_add_c4_buf", u0.kernel,
mOpenCLBackend->getCLTuneLevel(), "layernorm_buf")
.first;
mOpenCLBackend->recordKernel2d(u0.kernel, gwsVec, lwsVec);
u0.globalWorkSize = {gwsVec[0], gwsVec[1]};
u0.localWorkSize = {lwsVec[0], lwsVec[1]};
}
// unit[1]: layernorm_c4_buf (reads output0 residual, writes output1 norm)
{
auto& u1 = mUnits[1];
u1.kernel =
runtime->buildKernel("layernorm_buf", "layernorm_c4_buf", buildOptions, mOpenCLBackend->getPrecision());
OPENCL_CHECK_KERNEL(u1.kernel);
mGWS = {(uint32_t)local_size, (uint32_t)outter_size};
mLWS = {(uint32_t)local_size, 1};
uint32_t lidx = 0;
cl_int lret = CL_SUCCESS;
lret |= u1.kernel->get().setArg(lidx++, mGWS[0]);
lret |= u1.kernel->get().setArg(lidx++, mGWS[1]);
lret |= u1.kernel->get().setArg(lidx++, openCLBuffer(outputs[0])); // input = residual
lret |= u1.kernel->get().setArg(lidx++, openCLBuffer(outputs[1])); // output = norm
lret |= u1.kernel->get().setArg(lidx++, (int32_t)inner_size);
if (mResource->has_gamma_beta_) {
lret |= u1.kernel->get().setArg(lidx++, *mResource->mGammaBuffer.get());
lret |= u1.kernel->get().setArg(lidx++, *mResource->mBetaBuffer.get());
}
lret |= u1.kernel->get().setArg(lidx++, mResource->epsilon_);
MNN_CHECK_CL_SUCCESS(lret, "setArg layernorm_c4_buf (SPLIT)");
mOpenCLBackend->recordKernel2d(u1.kernel, mGWS, mLWS);
u1.globalWorkSize = {mGWS[0], mGWS[1]};
u1.localWorkSize = {mLWS[0], mLWS[1]};
}
return NO_ERROR;
}
// ---------- Single-kernel path (no residual add, or non-NC4HW4) ----------
mUnits.resize(1);
auto& unit = mUnits[0];
unit.kernel = runtime->buildKernel("layernorm_buf", kernelName, buildOptions, mOpenCLBackend->getPrecision());
OPENCL_CHECK_KERNEL(unit.kernel);
mGWS = {static_cast<uint32_t>(local_size), static_cast<uint32_t>(outter_size)};
mLWS = {static_cast<uint32_t>(local_size), 1};
uint32_t idx = 0;
cl_int ret = CL_SUCCESS;
ret |= unit.kernel->get().setArg(idx++, mGWS[0]);
ret |= unit.kernel->get().setArg(idx++, mGWS[1]);
ret |= unit.kernel->get().setArg(idx++, openCLBuffer(input));
ret |= unit.kernel->get().setArg(idx++, openCLBuffer(output));
ret |= unit.kernel->get().setArg(idx++, static_cast<int32_t>(inner_size));
if (mResource->has_gamma_beta_) {
ret |= unit.kernel->get().setArg(idx++, *mResource->mGammaBuffer.get());
ret |= unit.kernel->get().setArg(idx++, *mResource->mBetaBuffer.get());
}
ret |= unit.kernel->get().setArg(idx++, mResource->epsilon_);
MNN_CHECK_CL_SUCCESS(ret, "setArg LayerNormBufExecution");
mOpenCLBackend->recordKernel2d(unit.kernel, mGWS, mLWS);
unit.globalWorkSize = {mGWS[0], mGWS[1]};
unit.localWorkSize = {mLWS[0], mLWS[1]};
return NO_ERROR;
}
class LayerNormBufCreator : public OpenCLBackend::Creator {
public:
virtual ~LayerNormBufCreator() = default;
virtual Execution* onCreate(const std::vector<Tensor*>& inputs, const std::vector<Tensor*>& outputs,
const MNN::Op* op, Backend* backend) const override {
for (int i = 0; i < inputs.size(); ++i) {
TensorUtils::setTensorSupportPack(inputs[i], false);
}
for (int i = 0; i < outputs.size(); ++i) {
TensorUtils::setTensorSupportPack(outputs[i], false);
}
OPENCL_CREATOR_CHECK(new LayerNormBufExecution(inputs, op, backend));
}
};
REGISTER_OPENCL_OP_CREATOR(LayerNormBufCreator, OpType_LayerNorm, BUFFER);
} // namespace OpenCL
} // namespace MNN
#endif /* MNN_OPENCL_BUFFER_CLOSED */