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109 lines
5.0 KiB
Plaintext
109 lines
5.0 KiB
Plaintext
// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "helper.h"
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#include "paddle/extension.h"
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template <paddle::DataType D>
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void SwapCacheImpl(const paddle::Tensor& cache_gpu, // gpu
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const int64_t& cache_cpu_pointer, // cpu
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const int64_t& max_block_num_cpu,
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const std::vector<int64_t>& swap_block_ids_gpu,
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const std::vector<int64_t>& swap_block_ids_cpu,
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// const paddle::Tensor& swap_block_ids_dst, // cpu
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// const paddle::Tensor& swap_block_ids_src, // cpu
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int mode) {
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typedef PDTraits<D> traits_;
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typedef typename traits_::DataType DataType_;
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typedef typename traits_::data_t data_t;
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data_t* cache_gpu_ptr = const_cast<data_t*>(cache_gpu.data<data_t>());
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auto* cache_cpu_ptr = reinterpret_cast<data_t*>(cache_cpu_pointer);
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auto cache_shape = cache_gpu.shape();
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// auto* swap_block_ids_dst_ptr = swap_block_ids_dst.data<int32_t>();
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// auto* swap_block_ids_src_ptr = swap_block_ids_src.data<int32_t>();
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// const int swap_block_length = swap_block_ids_dst.shape()[0];
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const int64_t max_block_num_gpu = cache_shape[0];
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const int num_heads = cache_shape[1];
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const int block_size = cache_shape[2];
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const int head_dim = cache_shape[3];
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const int64_t cache_stride = num_heads * block_size * head_dim;
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auto stream = cache_gpu.stream();
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for (int i = 0; i < swap_block_ids_gpu.size(); ++i) {
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int64_t gpu_block_id = swap_block_ids_gpu[i];
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int64_t cpu_block_id = swap_block_ids_cpu[i];
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assert(gpu_block_id >= 0 && gpu_block_id < max_block_num_gpu);
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assert(cpu_block_id >= 0 && cpu_block_id < max_block_num_cpu);
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auto *cache_gpu_ptr_now = cache_gpu_ptr + gpu_block_id * cache_stride;
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auto *cache_cpu_ptr_now = cache_cpu_ptr + cpu_block_id * cache_stride;
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if (mode == 0) { // copy from device to host
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cudaMemcpyAsync(cache_cpu_ptr_now, cache_gpu_ptr_now, cache_stride * sizeof(DataType_), cudaMemcpyDeviceToHost, stream);
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// cudaMemcpy(cache_dst_ptr_now, cache_src_ptr_now, cache_stride * sizeof(DataType_), cudaMemcpyDeviceToHost);
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} else { // copy from host to device
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cudaMemcpyAsync(cache_gpu_ptr_now, cache_cpu_ptr_now, cache_stride * sizeof(DataType_), cudaMemcpyHostToDevice, stream);
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// cudaMemcpy(cache_dst_ptr_now, cache_src_ptr_now, cache_stride * sizeof(DataType_), cudaMemcpyHostToDevice);
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}
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}
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cudaStreamSynchronize(stream);
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}
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void SwapCache(const paddle::Tensor& cache_gpu, // gpu
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int64_t cache_cpu_ptr, // cpu memory pointer
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int64_t max_block_num_cpu, // cpu max block num
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const std::vector<int64_t>& swap_block_ids_gpu,
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const std::vector<int64_t>& swap_block_ids_cpu,
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int rank,
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int mode) {
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cudaSetDevice(rank); // used for distributed launch
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switch (cache_gpu.dtype()) {
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case paddle::DataType::BFLOAT16:
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return SwapCacheImpl<paddle::DataType::BFLOAT16>(
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cache_gpu,
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cache_cpu_ptr,
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max_block_num_cpu,
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swap_block_ids_gpu,
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swap_block_ids_cpu,
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mode);
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case paddle::DataType::FLOAT16:
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return SwapCacheImpl<paddle::DataType::FLOAT16>(
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cache_gpu,
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cache_cpu_ptr,
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max_block_num_cpu,
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swap_block_ids_gpu,
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swap_block_ids_cpu,
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mode);
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case paddle::DataType::UINT8:
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return SwapCacheImpl<paddle::DataType::UINT8>(
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cache_gpu,
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cache_cpu_ptr,
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max_block_num_cpu,
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swap_block_ids_gpu,
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swap_block_ids_cpu,
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mode);
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default:
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PD_THROW("Unsupported data type.");
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}
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}
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PD_BUILD_STATIC_OP(swap_cache)
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.Inputs({"cache_gpu",})
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.Attrs({"cache_cpu_ptr: int64_t",
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"max_block_num_cpu: int64_t",
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"swap_block_ids_gpu: std::vector<int64_t>",
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"swap_block_ids_cpu: std::vector<int64_t>",
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"rank: int",
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"mode: int",})
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.Outputs({"cache_dst_out"})
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.SetInplaceMap({{"cache_gpu", "cache_dst_out"}})
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.SetKernelFn(PD_KERNEL(SwapCache));
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