143 lines
6.1 KiB
C++
143 lines
6.1 KiB
C++
#pragma once
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#include <torch/python.h>
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#include "../../jit/compiler.hpp"
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#include "../../jit/device_runtime.hpp"
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#include "../../jit/kernel_runtime.hpp"
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#include "../../utils/exception.hpp"
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#include "../../utils/format.hpp"
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#include "../../utils/math.hpp"
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#include "../heuristics/sm100.hpp"
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#include "runtime_utils.hpp"
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namespace deep_gemm {
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class SM100BF16GemmRuntime final: public LaunchRuntime<SM100BF16GemmRuntime> {
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public:
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struct Args {
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int m, n, k, num_groups;
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const std::string& compiled_dims;
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GemmConfig gemm_config;
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LaunchArgs launch_args;
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void* grouped_layout;
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CUtensorMap tensor_map_a;
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CUtensorMap tensor_map_b;
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CUtensorMap tensor_map_c;
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CUtensorMap tensor_map_d;
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};
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static std::string generate_impl(const Args& args) {
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return fmt::format(R"(
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#include <deep_gemm/impls/sm100_bf16_gemm.cuh>
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using namespace deep_gemm;
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static void __instantiate_kernel() {{
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auto ptr = reinterpret_cast<void*>(&sm100_bf16_gemm_impl<
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{}, {},
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{}, {}, {},
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{}, {}, {},
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{},
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{}, {}, {},
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{},
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{}, {},
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{}, {},
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{},
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{}, {}, {},
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{}
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>);
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}};
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)",
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to_string(args.gemm_config.major_a), to_string(args.gemm_config.major_b),
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get_compiled_dim(args.m, 'm', args.compiled_dims), get_compiled_dim(args.n, 'n', args.compiled_dims), get_compiled_dim(args.k, 'k', args.compiled_dims),
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args.gemm_config.block_m, args.gemm_config.block_n, args.gemm_config.block_k,
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args.num_groups,
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args.gemm_config.smem_config.swizzle_a_mode, args.gemm_config.smem_config.swizzle_b_mode, args.gemm_config.smem_config.swizzle_cd_mode,
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args.gemm_config.num_stages,
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args.gemm_config.thread_config.num_non_epilogue_threads, args.gemm_config.thread_config.num_epilogue_threads,
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args.gemm_config.multicast_config.num_multicast, args.gemm_config.multicast_config.is_multicast_on_a,
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args.gemm_config.num_sms,
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to_string(args.gemm_config.gemm_type), args.gemm_config.with_accumulation, to_string(args.gemm_config.cd_dtype),
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args.gemm_config.tc_util);
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}
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static void launch_impl(const KernelHandle& kernel, const LaunchConfigHandle& config, Args args) {
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// TODO: optimize `args` copy
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DG_CUDA_UNIFIED_CHECK(launch_kernel(kernel, config,
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args.grouped_layout, args.m, args.n, args.k,
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args.tensor_map_a, args.tensor_map_b,
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args.tensor_map_c, args.tensor_map_d));
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}
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};
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static void sm100_bf16_gemm(const torch::Tensor& a,
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const torch::Tensor& b,
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const std::optional<torch::Tensor>& c,
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const torch::Tensor& d,
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const int& m, const int& n, const int& k,
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const cute::UMMA::Major& major_a, const cute::UMMA::Major& major_b,
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const std::string& compiled_dims) {
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const auto& aligned_k = align(k, 64);
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const auto& config = get_best_config<SM100ArchSpec>(
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GemmType::Normal, KernelType::KernelNoSF,
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m, n, k, 1, major_a, major_b,
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torch::kBFloat16, d.scalar_type(), c.has_value(),
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device_runtime->get_num_sms());
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const auto& cd = c.value_or(d);
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const auto& tensor_map_a = make_tma_a_desc(major_a, a, m, k,
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SM100ArchSpec::get_ab_load_block_m(config.multicast_config, config.block_m),
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config.block_k,
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static_cast<int>(a.stride(get_non_contiguous_dim(major_a))), 1,
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config.smem_config.swizzle_a_mode);
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const auto& tensor_map_b = make_tma_b_desc(major_b, b, n, k,
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SM100ArchSpec::get_ab_load_block_n(config.multicast_config, config.block_n),
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config.block_k,
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static_cast<int>(b.stride(get_non_contiguous_dim(major_b))), 1,
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config.smem_config.swizzle_b_mode);
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const auto& tensor_map_d = make_tma_cd_desc(d, m, n,
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SM100ArchSpec::get_cd_store_block_m(config.block_m),
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SM100ArchSpec::get_cd_store_block_n(config.block_n),
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static_cast<int>(d.stride(-2)), 1,
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config.smem_config.swizzle_cd_mode);
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const auto& tensor_map_c = make_tma_cd_desc(cd, m, n,
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SM100ArchSpec::get_cd_store_block_m(config.block_m),
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SM100ArchSpec::get_cd_store_block_n(config.block_n),
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static_cast<int>(cd.stride(-2)), 1,
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config.smem_config.swizzle_cd_mode);
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// Duplicate the accumulator if necessary
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if (c.has_value()) {
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if (c->data_ptr() == d.data_ptr()) {
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DG_HOST_ASSERT(c->sizes() == d.sizes() and c->strides() == d.strides());
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} else {
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// ReSharper disable once CppExpressionWithoutSideEffects
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d.copy_(c.value());
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}
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}
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// Launch
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const SM100BF16GemmRuntime::Args& args = {
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.m = m, .n = n, .k = aligned_k,
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.num_groups = 1,
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.compiled_dims = compiled_dims,
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.gemm_config = config,
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.launch_args = LaunchArgs(config.num_sms, config.thread_config.num_threads,
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config.smem_config.smem_size,
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config.multicast_config.num_multicast),
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.grouped_layout = nullptr,
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.tensor_map_a = tensor_map_a,
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.tensor_map_b = tensor_map_b,
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.tensor_map_c = tensor_map_c,
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.tensor_map_d = tensor_map_d
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};
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const auto& code = SM100BF16GemmRuntime::generate(args);
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const auto& runtime = compiler->build("sm100_bf16_gemm", code);
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SM100BF16GemmRuntime::launch(runtime, args);
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}
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} // namespace deep_gemm
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