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fix flatmm kernel for bigger size for fp16 datatype (#2302)

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This commit is contained in:
Khushbu Agarwal
2025-06-10 11:13:40 -07:00
committed by GitHub
parent aed0f5880c
commit bd270fe4bc
6 changed files with 91 additions and 98 deletions
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65
example/ck_tile/18_flatmm/run_flatmm_example.inc
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@@ -32,38 +32,20 @@ static constexpr inline auto is_row_major(Layout layout_)
}
// mfma_type, 0:32x32, 1:16x16
template <typename T>
auto shuffle_b(const ck_tile::HostTensor<T>& t, std::string mfma_dtype, int mfma_type)
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];
if((mfma_dtype == "bf16" || mfma_dtype == "fp16") && mfma_type == 0)
{
ck_tile::HostTensor<T> t_view({n_ / 32, 32, k_ / 16, 2, 8});
std::copy(t.begin(), t.end(), t_view.begin());
return ck_tile::reference_permute(t_view, {0, 2, 3, 1, 4});
}
else if((mfma_dtype == "bf16" || mfma_dtype == "fp16") && mfma_type == 1)
{
ck_tile::HostTensor<T> t_view({n_ / 16, 16, k_ / 32, 4, 8});
std::copy(t.begin(), t.end(), t_view.begin());
return ck_tile::reference_permute(t_view, {0, 2, 3, 1, 4});
}
else if((mfma_dtype == "int8" || mfma_dtype == "fp8" || mfma_dtype == "bf8") && mfma_type == 0)
{
ck_tile::HostTensor<T> t_view({n_ / 32, 32, k_ / 32, 2, 16});
std::copy(t.begin(), t.end(), t_view.begin());
return ck_tile::reference_permute(t_view, {0, 2, 3, 1, 4});
}
else if((mfma_dtype == "int8" || mfma_dtype == "fp8" || mfma_dtype == "bf8") && mfma_type == 1)
{
ck_tile::HostTensor<T> t_view({n_ / 16, 16, k_ / 64, 4, 16});
std::copy(t.begin(), t.end(), t_view.begin());
return ck_tile::reference_permute(t_view, {0, 2, 3, 1, 4});
}
return t;
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>
@@ -149,10 +131,11 @@ int run_flatmm_example_with_layouts(int argc,
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;
using ADataType = typename GemmBasicTypeConfig<PrecType>::ADataType;
using BDataType = typename GemmBasicTypeConfig<PrecType>::BDataType;
using CDataType = typename GemmBasicTypeConfig<PrecType>::CDataType;
using AccDataType = typename GemmBasicTypeConfig<PrecType>::AccDataType;
using FlatmmConfig = FlatmmConfig<ADataType>;
ck_tile::index_t M = arg_parser.get_int("m");
ck_tile::index_t N = arg_parser.get_int("n");
@@ -163,8 +146,9 @@ int run_flatmm_example_with_layouts(int argc,
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");
int n_warmup = arg_parser.get_int("warmup");
int n_repeat = arg_parser.get_int("repeat");
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));
@@ -188,13 +172,8 @@ int run_flatmm_example_with_layouts(int argc,
c_rslt_host.SetZero();
// do pre-shuffle
std::string mfma = arg_parser.get_str("prec");
#if defined(USING_MFMA_16x16x32) && defined(ENABLE_FP8)
ck_tile::index_t mfma_type = 1;
#else
ck_tile::index_t mfma_type = 0;
#endif
ck_tile::HostTensor<BDataType> b_shuffle_host = shuffle_b(b_origin_host, mfma, mfma_type);
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());