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composable_kernel/example/ck_tile/18_flatmm/run_flatmm_example.inc

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// SPDX-License-Identifier: MIT
// Copyright (c) 2024-2025, Advanced Micro Devices, Inc. All rights reserved.
#pragma once
#include <type_traits>
template <typename T>
constexpr const char* DataTypeToString()
{
if constexpr(std::is_same_v<T, ck_tile::half_t>)
{
return "fp16";
}
else if constexpr(std::is_same_v<T, ck_tile::fp8_t>)
{
return "fp8";
}
else if constexpr(std::is_same_v<T, ck_tile::bf8_t>)
{
return "bf8";
}
else if constexpr(std::is_same_v<T, ck_tile::bf16_t>)
{
return "bf16";
}
else
{
return "unknown";
}
}
template <typename Layout>
static constexpr inline auto is_row_major(Layout layout_)
{
return ck_tile::bool_constant<std::is_same_v<ck_tile::remove_cvref_t<decltype(layout_)>,
ck_tile::tensor_layout::gemm::RowMajor>>{};
}
// mfma_type, 0:32x32, 1:16x16
template <typename FlatmmConfig, typename T>
auto shuffle_b(const ck_tile::HostTensor<T>& t)
{
assert(t.get_lengths().size() == 2);
int n_ = t.get_lengths()[1];
int k_ = t.get_lengths()[0];
constexpr int divisor = FlatmmConfig::N_Warp_Tile == 32 ? 2 : 4;
ck_tile::HostTensor<T> t_view({n_ / FlatmmConfig::N_Warp_Tile,
FlatmmConfig::N_Warp_Tile,
k_ / FlatmmConfig::K_Warp_Tile,
divisor,
FlatmmConfig::K_Warp_Tile / divisor});
std::copy(t.begin(), t.end(), t_view.begin());
return ck_tile::reference_permute(t_view, {0, 2, 3, 1, 4});
}
template <typename ADataType, typename BDataType, typename AccDataType, typename CDataType>
auto calculate_rtol_atol(const ck_tile::index_t K,
const ck_tile::index_t kbatch,
const float max_accumulated_value)
{
using ComputeType =
std::conditional_t<sizeof(ADataType) < sizeof(BDataType), ADataType, BDataType>;
// Calculate thresholds
const auto rtol = ck_tile::get_relative_threshold<ComputeType, CDataType, AccDataType>(
ck_tile::integer_divide_ceil(K, kbatch));
const auto atol = ck_tile::get_absolute_threshold<ComputeType, CDataType, AccDataType>(
max_accumulated_value / kbatch, ck_tile::integer_divide_ceil(K, kbatch));
// Calculate error due to split_k accumulation
const auto rtol_split_k =
ck_tile::get_relative_threshold<CDataType, CDataType, CDataType>(kbatch);
const auto atol_split_k = ck_tile::get_absolute_threshold<CDataType, CDataType, CDataType>(
max_accumulated_value, kbatch);
// Use higher threshold
return ck_tile::make_tuple(std::max(rtol, rtol_split_k), std::max(atol, atol_split_k));
}
template <typename FlatmmConfig,
typename ADataType,
typename BDataType,
typename DsDatatype,
typename AccDataType,
typename CDataType,
typename ALayout,
typename BLayout,
typename DsLayout,
typename ELayout,
bool persistent,
typename CDEElementWise>
float flatmm_calc(const ck_tile::FlatmmHostArgs<>& args, const ck_tile::stream_config& s);
template <typename FlatmmConfig,
typename ADataType,
typename BDataType,
typename DsDatatype,
typename AccDataType,
typename CDataType,
typename ALayout,
typename BLayout,
typename DsLayout,
typename CLayout,
typename CDEElementWise = ck_tile::element_wise::PassThrough>
float invoke_flatmm(ck_tile::DeviceMem& a_dev_buf,
ck_tile::DeviceMem& b_shuffle_dev_buf,
ck_tile::DeviceMem& c_dev_buf,
ck_tile::index_t M,
ck_tile::index_t N,
ck_tile::index_t K,
ck_tile::index_t stride_A,
ck_tile::index_t stride_B,
ck_tile::index_t stride_C,
ck_tile::index_t kbatch,
int n_warmup,
int n_repeat)
{
ck_tile::FlatmmHostArgs<> args = {a_dev_buf.GetDeviceBuffer(),
b_shuffle_dev_buf.GetDeviceBuffer(),
{},
c_dev_buf.GetDeviceBuffer(),
kbatch,
M,
N,
K,
stride_A,
stride_B,
{},
stride_C};
float ave_time = flatmm_calc<FlatmmConfig,
ADataType,
BDataType,
DsDatatype,
AccDataType,
CDataType,
ALayout,
BLayout,
DsLayout,
CLayout,
false,
CDEElementWise>(
args, ck_tile::stream_config{nullptr, true, 1, n_warmup, n_repeat, true, true, 50});
std::size_t flop = std::size_t(2) * M * N * K;
std::size_t num_byte =
sizeof(ADataType) * M * K + sizeof(BDataType) * N * K + sizeof(CDataType) * M * N;
float tflops = static_cast<float>(flop) / 1.E9 / ave_time;
float gb_per_sec = num_byte / 1.E6 / ave_time;
std::cout << "Run Flatmm kernel with DataType = " << DataTypeToString<ADataType>()
<< " M =" << M << " N =" << N << " K =" << K << " StrideA =" << stride_A
<< " StrideB =" << stride_B << " StrideC =" << stride_C << " : " << ave_time
<< " ms, " << tflops << " TFlops, " << gb_per_sec << " GB/s, " << std::endl;
return ave_time;
}
template <typename PrecType,
typename FlatmmConfig,
typename ALayout,
typename BLayout,
typename CLayout>
int run_flatmm_example_with_layouts(int argc,
char* argv[],
const ALayout a_layout = ALayout{},
const BLayout b_layout = BLayout{},
[[maybe_unused]] const CLayout c_layout = CLayout{})
{
auto [result, arg_parser] = create_args(argc, argv);
if(!result)
return -1;
using ADataType = typename GemmBasicTypeConfig<PrecType>::ADataType;
using BDataType = typename GemmBasicTypeConfig<PrecType>::BDataType;
using CDataType = typename GemmBasicTypeConfig<PrecType>::CDataType;
using AccDataType = typename GemmBasicTypeConfig<PrecType>::AccDataType;
ck_tile::index_t M = arg_parser.get_int("m");
ck_tile::index_t N = arg_parser.get_int("n");
ck_tile::index_t K = arg_parser.get_int("k");
ck_tile::index_t stride_A = arg_parser.get_int("stride_a");
ck_tile::index_t stride_B = arg_parser.get_int("stride_b");
ck_tile::index_t stride_C = arg_parser.get_int("stride_c");
ck_tile::index_t kbatch = arg_parser.get_int("split_k");
int n_warmup = arg_parser.get_int("warmup");
int n_repeat = arg_parser.get_int("repeat");
ck_tile::index_t init_method = arg_parser.get_int("init");
// persistent not added
stride_A = ck_tile::get_default_stride(M, K, stride_A, is_row_major(a_layout));
stride_B = ck_tile::get_default_stride(K, N, stride_B, is_row_major(b_layout));
stride_C = ck_tile::get_default_stride(M, N, stride_C, is_row_major(CLayout{}));
ck_tile::HostTensor<ADataType> a_host(
ck_tile::host_tensor_descriptor(M, K, stride_A, is_row_major(a_layout)));
ck_tile::HostTensor<BDataType> b_origin_host(
ck_tile::host_tensor_descriptor(K, N, stride_B, is_row_major(b_layout)));
ck_tile::HostTensor<CDataType> c_rslt_host(
ck_tile::host_tensor_descriptor(M, N, stride_C, is_row_major(CLayout{})));
// TODO: add different init types
if(init_method == 0)
{
ck_tile::FillUniformDistribution<ADataType>{-.5f, .5f}(a_host);
ck_tile::FillUniformDistribution<BDataType>{-.5f, .5f}(b_origin_host);
}
else if(init_method == 1)
{
ck_tile::FillMonotonicSeq<ADataType>{}(a_host);
ck_tile::FillMonotonicSeq<BDataType>{}(b_origin_host);
}
else if(init_method == 2)
{
ck_tile::FillUniformDistribution<ADataType>{1.f, 1.f}(a_host);
ck_tile::FillUniformDistribution<BDataType>{1.f, 1.f}(b_origin_host);
}
else
{
a_host.SetZero();
b_origin_host.SetZero();
}
ck_tile::DeviceMem a_dev_buf(a_host.get_element_space_size_in_bytes());
ck_tile::DeviceMem c_dev_buf(c_rslt_host.get_element_space_size_in_bytes());
a_dev_buf.ToDevice(a_host.data());
c_rslt_host.SetZero();
// do pre-shuffle
ck_tile::HostTensor<BDataType> b_shuffle_host = shuffle_b<FlatmmConfig>(b_origin_host);
ck_tile::DeviceMem b_shuffle_dev_buf(b_shuffle_host.get_element_space_size_in_bytes());
b_shuffle_dev_buf.ToDevice(b_shuffle_host.data());
invoke_flatmm<FlatmmConfig,
ADataType,
BDataType,
ck_tile::tuple<>,
AccDataType,
CDataType,
ALayout,
BLayout,
ck_tile::tuple<>,
CLayout>(a_dev_buf,
b_shuffle_dev_buf,
c_dev_buf,
M,
N,
K,
stride_A,
stride_B,
stride_C,
kbatch,
n_warmup,
n_repeat);
c_dev_buf.FromDevice(c_rslt_host.data());
bool pass = true;
if(arg_parser.get_int("v") == 1)
{
ck_tile::HostTensor<CDataType> c_ref_host(
ck_tile::host_tensor_descriptor(M, N, stride_C, is_row_major(CLayout{})));
c_ref_host.SetZero();
ck_tile::reference_gemm<ADataType, BDataType, AccDataType, CDataType>(
a_host, b_origin_host, c_ref_host);
const float max_accumulated_value =
*std::max_element(c_ref_host.mData.begin(), c_ref_host.mData.end());
const auto rtol_atol = calculate_rtol_atol<ADataType, BDataType, AccDataType, CDataType>(
K, kbatch, max_accumulated_value);
pass = ck_tile::check_err(c_rslt_host,
c_ref_host,
"Error: Incorrect results!",
rtol_atol.at(ck_tile::number<0>{}),
rtol_atol.at(ck_tile::number<1>{}));
std::cout << "Relative error threshold: " << rtol_atol.at(ck_tile::number<0>{})
<< " Absolute error threshold: " << rtol_atol.at(ck_tile::number<1>{})
<< std::endl;
std::cout << "The CPU veification result is:" << (pass ? "correct" : "fail") << std::endl;
}
else if(arg_parser.get_int("v") == 2)
{
ck_tile::DeviceMem b_origin_dev_buf(b_origin_host.get_element_space_size_in_bytes());
b_origin_dev_buf.ToDevice(b_origin_host.data());
ck_tile::HostTensor<CDataType> c_gpu_ref_host(
ck_tile::host_tensor_descriptor(M, N, stride_C, is_row_major(CLayout{})));
ck_tile::DeviceMem c_gpu_ref_dev_buf(c_gpu_ref_host.get_element_space_size_in_bytes());
c_gpu_ref_host.SetZero();
c_gpu_ref_dev_buf.SetZero();
ADataType* d_A;
BDataType* d_B;
CDataType* d_C;
ck_tile::hip_check_error(hipMalloc(&d_A, M * K * sizeof(ADataType)));
ck_tile::hip_check_error(hipMalloc(&d_B, N * K * sizeof(BDataType)));
ck_tile::hip_check_error(hipMalloc(&d_C, M * N * sizeof(CDataType)));
ck_tile::hip_check_error(hipMemcpy(
d_A, a_dev_buf.GetDeviceBuffer(), M * K * sizeof(ADataType), hipMemcpyHostToDevice));
ck_tile::hip_check_error(hipMemcpy(d_B,
b_origin_dev_buf.GetDeviceBuffer(),
N * K * sizeof(BDataType),
hipMemcpyHostToDevice));
ck_tile::reference_gemm_gpu<ADataType,
BDataType,
AccDataType,
CDataType,
ALayout,
BLayout,
CLayout>(d_A, d_B, d_C, M, N, K, stride_A, stride_B, stride_C);
ck_tile::hip_check_error(hipMemcpy(c_gpu_ref_dev_buf.GetDeviceBuffer(),
d_C,
M * N * sizeof(CDataType),
hipMemcpyDeviceToHost));
ck_tile::hip_check_error(hipFree(d_A));
ck_tile::hip_check_error(hipFree(d_B));
ck_tile::hip_check_error(hipFree(d_C));
c_gpu_ref_dev_buf.FromDevice(c_gpu_ref_host.data());
const float max_accumulated_value =
*std::max_element(c_gpu_ref_host.mData.begin(), c_gpu_ref_host.mData.end());
const auto rtol_atol = calculate_rtol_atol<ADataType, BDataType, AccDataType, CDataType>(
K, kbatch, max_accumulated_value);
pass = ck_tile::check_err(c_rslt_host,
c_gpu_ref_host,
"Error: Incorrect results!",
rtol_atol.at(ck_tile::number<0>{}),
rtol_atol.at(ck_tile::number<1>{}));
std::cout << "Relative error threshold: " << rtol_atol.at(ck_tile::number<0>{})
<< " Absolute error threshold: " << rtol_atol.at(ck_tile::number<1>{})
<< std::endl;
std::cout << "The GPU veification result is: " << (pass ? "correct" : "fail") << std::endl;
}
return pass;
}
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