Add rotating buff for gemm_multi_d (#1411)

* add rotating_buff for gemm_multi_d

* format

* Update flush_cache.hpp

* Update gtest.cmake

---------
Co-authored-by: Jing Zhang <jizhan@fb.com>
Co-authored-by: Haocong WANG <haocwang@amd.com>

include/ck/host_utility/flush_cache.hpp

@@ -14,6 +14,124 @@
 namespace ck {
 namespace utility {
 
+template <typename Argument, typename DsDataType>
+struct RotatingMemWrapperMultiD
+{
+    static constexpr index_t NumDs = DsDataType::Size();
+
+    using ADataType     = decltype(Argument::p_a_grid);
+    using BDataType     = decltype(Argument::p_b_grid);
+    using DsGridPointer = decltype(Argument::p_ds_grid);
+
+    RotatingMemWrapperMultiD() = delete;
+    RotatingMemWrapperMultiD(Argument& arg_,
+                             std::size_t rotating_count_,
+                             std::size_t size_a_,
+                             std::size_t size_b_,
+                             std::array<std::size_t, NumDs> size_ds_)
+        : arg(arg_),
+          rotating_count(rotating_count_),
+          size_a(size_a_),
+          size_b(size_b_),
+          size_ds(size_ds_)
+    {
+        p_a_grids.push_back(arg.p_a_grid);
+        p_b_grids.push_back(arg.p_b_grid);
+        p_ds_grids.push_back(arg.p_ds_grid);
+        for(size_t i = 1; i < rotating_count; i++)
+        {
+            {
+                void* pADeviceBuf;
+                hip_check_error(hipMalloc(static_cast<void**>(&pADeviceBuf), size_a_));
+                hip_check_error(hipMemcpy(static_cast<void*>(pADeviceBuf),
+                                          const_cast<void*>(p_a_grids[0]),
+                                          size_a_,
+                                          hipMemcpyDeviceToDevice));
+                p_a_grids.push_back(pADeviceBuf);
+            }
+
+            {
+                void* pBDeviceBuf;
+                hip_check_error(hipMalloc(static_cast<void**>(&pBDeviceBuf), size_b_));
+                hip_check_error(hipMemcpy(static_cast<void*>(pBDeviceBuf),
+                                          const_cast<void*>(p_b_grids[0]),
+                                          size_b_,
+                                          hipMemcpyDeviceToDevice));
+                p_b_grids.push_back(pBDeviceBuf);
+            }
+
+            {
+
+                DsGridPointer ds_buffer;
+                static_for<0, NumDs, 1>{}([&](auto j) {
+                    void* pDDeviceBuf;
+                    hip_check_error(hipMalloc(static_cast<void**>(&pDDeviceBuf), size_ds_[j]));
+                    hip_check_error(hipMemcpy(static_cast<void*>(pDDeviceBuf),
+                                              static_cast<const void*>(p_ds_grids[0][j]),
+                                              size_ds_[j],
+                                              hipMemcpyDeviceToDevice));
+
+                    using DDataType = remove_cvref_t<tuple_element_t<j.value, DsDataType>>;
+
+                    ds_buffer(j) = static_cast<const DDataType*>(pDDeviceBuf);
+                });
+
+                p_ds_grids.push_back(ds_buffer);
+            }
+        }
+    }
+
+    void Next()
+    {
+        if(rotating_count > 1)
+        {
+            std::size_t idx = iter++ % rotating_count;
+            arg.p_a_grid    = reinterpret_cast<ADataType>(p_a_grids[idx]);
+            arg.p_b_grid    = reinterpret_cast<BDataType>(p_b_grids[idx]);
+            arg.p_ds_grid   = p_ds_grids[idx];
+        }
+    }
+    void Print()
+    {
+        std::cout << "RotatingMemWrapperMultiD: { size_a: " << size_a << ", size_b: " << size_b
+                  << ", rotating_count: " << rotating_count << "}" << std::endl;
+    }
+    ~RotatingMemWrapperMultiD()
+    {
+        if(rotating_count > 1)
+        {
+            // restore ptr
+            arg.p_a_grid  = reinterpret_cast<ADataType>(p_a_grids[0]);
+            arg.p_b_grid  = reinterpret_cast<BDataType>(p_b_grids[0]);
+            arg.p_ds_grid = p_ds_grids[0];
+
+            // free device mem
+            for(size_t i = 1; i < rotating_count; i++)
+            {
+                hip_check_error(hipFree(const_cast<void*>(p_a_grids[i])));
+                hip_check_error(hipFree(const_cast<void*>(p_b_grids[i])));
+
+                static_for<0, NumDs, 1>{}([&](auto j) {
+                    using DDataType = remove_cvref_t<tuple_element_t<j.value, DsDataType>>;
+                    hip_check_error(
+                        hipFree(static_cast<void*>(const_cast<DDataType*>(p_ds_grids[i][j]))));
+                });
+            }
+        }
+    }
+
+    private:
+    Argument& arg;
+    std::size_t iter                       = 0;
+    std::size_t rotating_count             = 1;
+    std::size_t size_a                     = 0;
+    std::size_t size_b                     = 0;
+    std::array<std::size_t, NumDs> size_ds = {0};
+    std::vector<const void*> p_a_grids;
+    std::vector<const void*> p_b_grids;
+    std::vector<DsGridPointer> p_ds_grids;
+};
+
 template <typename Argument>
 struct RotatingMemWrapper
 {

include/ck/tensor_operation/gpu/device/impl/device_gemm_multiple_d_xdl_cshuffle_v3.hpp

@@ -15,6 +15,7 @@
 #include "ck/tensor_operation/gpu/grid/gridwise_gemm_xdl_cshuffle_v3_multi_d.hpp"
 #include "ck/host_utility/device_prop.hpp"
 #include "ck/host_utility/kernel_launch.hpp"
+#include "ck/host_utility/flush_cache.hpp"
 
 namespace ck {
 namespace tensor_operation {
@@ -163,6 +164,56 @@ struct DeviceGemmMultiD_Xdl_CShuffle_V3 : public DeviceGemmMultipleD<ALayout,
             const bool has_main_k_block_loop = GridwiseGemm::CalculateHasMainKBlockLoop(K_split);
 
             const auto Run = [&](const auto& kernel) {
+                if(stream_config.flush_cache)
+                {
+
+                    std::array<std::size_t, NumDTensor> DsSize;
+
+                    Argument arg_ = arg;
+
+                    const auto ds_grid_desc_m_n = GridwiseGemm::MakeDsGridDescriptor_M_N(
+                        arg_.M, arg_.MPadded, arg_.N, arg_.NPadded, arg_.StrideDs);
+
+                    static_for<0, NumDTensor, 1>{}([&](auto i) {
+                        using DDataType = remove_cvref_t<tuple_element_t<i.value, DsDataType>>;
+                        DsSize[i] = ds_grid_desc_m_n[i].GetElementSpaceSize() * sizeof(DDataType);
+                    });
+                    ck::utility::RotatingMemWrapperMultiD<Argument, DsDataType> rotating_mem(
+                        arg_,
+                        stream_config.rotating_count,
+                        arg_.M * arg_.K * sizeof(ADataType),
+                        arg_.K * arg_.N * sizeof(BDataType),
+                        DsSize);
+                    rotating_mem.Print();
+
+                    auto run_flush_cache = [&]() {
+                        // flush icache
+                        ck::utility::flush_icache();
+                        // rotating mem
+                        rotating_mem.Next();
+                        // clear c mem
+                        if constexpr(!is_same<remove_cvref_t<CDataType>, bhalf_t>::value)
+                        {
+                            if(arg_.KBatch > 1)
+                                hipGetErrorString(
+                                    hipMemsetAsync(arg_.p_c_grid,
+                                                   0,
+                                                   arg_.M * arg_.N * sizeof(CDataType),
+                                                   stream_config.stream_id_));
+                        }
+                    };
+
+                    ave_time = ck::utility::launch_and_time_kernel_with_preprocess<false>(
+                        stream_config,
+                        run_flush_cache,
+                        kernel,
+                        dim3(gdx, gdy, gdz),
+                        dim3(BlockSize),
+                        0,
+                        arg_);
+                }
+                else
+                {
                     if(arg.KBatch > 1)
                         hipGetErrorString(hipMemsetAsync(arg.p_c_grid,
                                                          0,
@@ -171,6 +222,7 @@ struct DeviceGemmMultiD_Xdl_CShuffle_V3 : public DeviceGemmMultipleD<ALayout,
 
                     ave_time = launch_and_time_kernel(
                         stream_config, kernel, dim3(gdx, gdy, gdz), dim3(BlockSize), 0, arg);
+                }
             };
 
             constexpr index_t minimum_occupancy =