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gemm_grouped.cu
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/***************************************************************************************************
* Copyright (c) 2017 - 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************************************/
/*! \file
\brief GEMM Grouped Example.
This workload computes a batch of GEMM operations with distinct problem sizes. Pointers to matrices
in Global Memory are passed to the kernel in array (also held in Global Memory). Similarly,
leading dimensions and problem sizes are stored in arrays in GMEM.
This differs from "Batched Array" GEMM because the size of each GEMM problem in the Grouped GEMM
concept may be distinct.
This benchmark program initializes a workspace with random problem sizes for a given number of
groups. Command line options enable overriding M, N, and/or K dimensions with uniform values to
model problems more similar to the traditional batched GEMM.
Additionally, problem sizes are collected and binned to compute the same problem as a series of
conventional batched GEMMs (setup for this problem is not timed). This demonstrates the performance
enhancement achieved by implementing a specialized grouped GEMM kernel.
Examples:
# Runs a grouped GEMM with 100 random problem sizes
$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100
# Runs a grouped GEMM with 100 random problem sizes (with GEMM-K dimension equal to 1024)
$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100 --k=1024 --verbose=true
# Runs a grouped GEMM that is equivalent to a batched GEMM
$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100 --m=2048 --n=1024 --k=1024 --verbose=true
# Execute Grouped GEMM and profile with NSight
$ nv-nsight-cu-cli ./examples/24_gemm_grouped/24_gemm_grouped --m=256 --n=256 --k=256 --verbose=true \
--iterations=1 --reference-check=false
*/
/////////////////////////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <map>
#include <unordered_map>
#include "cutlass/cutlass.h"
#include "cutlass/gemm/gemm.h"
#include "cutlass/gemm/kernel/gemm_grouped.h"
#include "cutlass/gemm/kernel/default_gemm_grouped.h"
#include "cutlass/gemm/device/gemm_grouped.h"
#include "cutlass/gemm/device/gemm_universal.h"
#include "cutlass/util/command_line.h"
#include "cutlass/util/distribution.h"
#include "cutlass/util/device_memory.h"
#include "cutlass/util/tensor_view_io.h"
#include "cutlass/util/host_tensor.h"
#include "cutlass/util/reference/host/gemm_complex.h"
#include "cutlass/util/reference/device/gemm_complex.h"
#include "cutlass/util/reference/host/tensor_compare.h"
#include "cutlass/util/reference/host/tensor_copy.h"
#include "cutlass/util/reference/device/tensor_fill.h"
#include "cutlass/util/reference/host/tensor_norm.h"
/////////////////////////////////////////////////////////////////////////////////////////////////
/// Result structure
struct Result {
double runtime_ms;
double gflops;
cutlass::Status status;
cudaError_t error;
bool passed;
//
// Methods
//
Result(
double runtime_ms = 0,
double gflops = 0,
cutlass::Status status = cutlass::Status::kSuccess,
cudaError_t error = cudaSuccess
):
runtime_ms(runtime_ms), gflops(gflops), status(status), error(error), passed(true) { }
};
/////////////////////////////////////////////////////////////////////////////////////////////////
/// Hash function for cutlass::gemm::GemmCoord
struct HashGemmCoord {
size_t operator()(cutlass::gemm::GemmCoord const &problem) const {
std::hash<int> hasher;
return (hasher(problem.m() * 3)) ^ (hasher(1 + problem.n() * 5)) ^ (hasher(2 + problem.k() * 7));
}
};
/////////////////////////////////////////////////////////////////////////////////////////////////
// Command line options parsing
struct Options {
bool help;
bool error;
bool reference_check;
std::vector<cutlass::gemm::GemmCoord> problem_sizes;
// problem size bins
std::unordered_map<
cutlass::gemm::GemmCoord,
std::vector<int32_t>,
HashGemmCoord> problem_bins;
int alignment;
int problem_count;
int iterations;
int cuda_streams;
bool verbose;
float alpha;
float beta;
std::string benchmark_path;
std::string output_tag;
std::ofstream output_file;
//
// Methods
//
Options():
help(false),
error(false),
alignment(8),
reference_check(true),
problem_count(15),
iterations(20),
cuda_streams(0),
verbose(false),
alpha(1),
beta()
{ }
// Parses the command line
void parse(int argc, char const **args) {
cutlass::CommandLine cmd(argc, args);
if (cmd.check_cmd_line_flag("help")) {
help = true;
return;
}
cmd.get_cmd_line_argument("alignment", alignment, 8);
cmd.get_cmd_line_argument("groups", problem_count, 15);
cmd.get_cmd_line_argument("alpha", alpha, 1.0f);
cmd.get_cmd_line_argument("beta", beta, 0.0f);
cmd.get_cmd_line_argument("iterations", iterations, 20);
cmd.get_cmd_line_argument("streams", cuda_streams, 0);
cmd.get_cmd_line_argument("verbose", verbose, false);
cmd.get_cmd_line_argument("reference-check", reference_check, true);
cmd.get_cmd_line_argument("benchmark", benchmark_path);
std::string output_path;
cmd.get_cmd_line_argument("tag", output_tag);
cmd.get_cmd_line_argument("output_file", output_path);
if (!output_path.empty()) {
std::ios_base::openmode open_mode = std::ios_base::out;
std::ifstream input_file(output_path.c_str());
if (input_file.good()) {
open_mode = std::ios_base::app;
input_file.close();
}
output_file.open(output_path.c_str(), open_mode);
if (output_file.good() && open_mode != std::ios_base::app) {
output_file << "Tag,Provider,Kind,Groups,Runtime,GFLOPs\n";
}
}
// Decide how to initialize the problems
if (!benchmark_path.empty()) {
if (!benchmark_problems()) {
error = true;
problem_sizes.clear();
return;
}
}
else {
randomize_problems(cmd);
}
// Post-process the problem sizes
bin_problems();
}
void randomize_problems(cutlass::CommandLine &cmd) {
//
// For now, randomly choose the problem sizes.
//
int cmd_line_m = -1;
int cmd_line_n = -1;
int cmd_line_k = -1;
cmd.get_cmd_line_argument("m", cmd_line_m);
cmd.get_cmd_line_argument("n", cmd_line_n);
cmd.get_cmd_line_argument("k", cmd_line_k);
problem_sizes.reserve(problem_count);
for (int i = 0; i < problem_count; ++i) {
int m = cmd_line_m;
int n = cmd_line_n;
int k = cmd_line_k;
if (m < 1) {
m = alignment * ((rand() % 256) + 1);
}
if (n < 1) {
n = alignment * ((rand() % 256) + 1);
}
if (k < 1) {
k = alignment * ((rand() % 256) + 1);
}
cutlass::gemm::GemmCoord problem(m, n, k);
problem_sizes.push_back(problem);
}
}
/// Load a benchmark
bool benchmark_problems() {
std::ifstream file(benchmark_path);
if (!file.good()) {
return false;
}
while (file.good()) {
int idx = -1;
std::string extent_str;
file >> idx >> extent_str;
if (idx < 0 || extent_str.empty()) {
break;
}
cutlass::gemm::GemmCoord extent;
std::vector<std::string> tokens;
cutlass::CommandLine::tokenize(tokens, extent_str, 'x');
for (int i = 0; i < int(tokens.size()); ++i) {
int x = std::atoi(tokens.at(i).c_str());
// round up
if (x % alignment) {
x += (alignment - (x % alignment));
}
extent.at(i) = x;
}
if (extent.product()) {
problem_sizes.push_back(extent);
}
}
return true;
}
/// Post processes the problems
void bin_problems() {
problem_count = int(problem_sizes.size());
//
// Insert the problem sizes into a sorted container class. This is *NOT* necessary
// to run the CUTLASS kernel, but it enables the execution of cublas's batched GEMM.
//
for (int i = 0; i < int(problem_sizes.size()); ++i) {
auto it = problem_bins.find(problem_sizes.at(i));
if (it == problem_bins.end()) {
problem_bins.insert({problem_sizes.at(i), std::vector<int32_t>({i}) });
}
else {
it->second.push_back(i);
}
}
}
/// Prints the usage statement.
std::ostream & print_usage(std::ostream &out) const {
out << "24_gemm_grouped\n\n"
<< " This example profiles the performance of a 'grouped' GEMM kernel. This is similar to batched GEMM\n"
<< " in that multiple, independent GEMMs are computed by one grid launch. It differs in that each\n"
<< " 'group' may compute a unique problem size. Problem sizes and pointers to matrices are both stored\n"
<< " in device Global Memory and loaded by the kernel.\n\n"
<< "Options:\n\n"
<< " --help If specified, displays this usage statement.\n\n"
<< " --benchmark=<str> Executes a benchmark problem size.\n"
<< " --output_file=<str> Path to a CSV file to output results. If it exists already, results are appended.\n"
<< " --tag=<str> String tag to prepend to the CSV file.\n"
<< " --groups=<int> Number of individual GEMM problems (default: --groups=15)\n"
<< " --m=<int> Sets the M dimension for all groups. Otherwise, it is selected randomly\n"
<< " --n=<int> Sets the N dimension for all groups. Otherwise, it is selected randomly\n"
<< " --k=<int> Sets the K dimension for all groups. Otherwise, it is selected randomly\n"
<< " --alpha=<f32> Epilogue scalar alpha (real part)\n"
<< " --beta=<f32> Epilogue scalar beta (real part)\n\n"
<< " --iterations=<int> Number of profiling iterations to perform.\n"
<< " --reference-check=<bool> If true, performs reference check.\n"
<< " --verbose=<bool> If true, prints problem sizes and batching structure.\n";
out << "\n\nExamples:\n\n"
<< "# Runs a grouped GEMM with 100 random problem sizes\n"
<< "$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100\n\n"
<< "# Runs a grouped GEMM with 100 random problem sizes (with GEMM-K dimension equal to 1024)\n"
<< "$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100 --k=1024 --verbose=true\n\n"
<< "# Runs a grouped GEMM that is equivalent to a batched GEMM\n"
<< "$ ./examples/24_gemm_grouped/24_gemm_grouped --groups=100 --m=2048 --n=1024 --k=1024 --verbose=true\n\n"
<< "# Runs a grouped GEMM problem given an externally supplied benchmark file. This is a text file in which\n"
<< "# Each line contains a unique group index and an MxNxK triple indicating problemsize.\n"
<< "#\n"
<< "# For example, assume the following are the contents of 'problems.txt'\n"
<< "#\n"
<< "# 0 1024x256x520\n"
<< "# 1 520x264x1024\n"
<< "# 2 96x48x1024\n"
<< "#\n"
<< "$ ./examples/24_gemm_grouped/24_gemm_grouped --benchmark=problems.txt\n\n"
<< "# Execute Grouped GEMM and profile with NSight\n"
<< "$ nv-nsight-cu-cli ./examples/24_gemm_grouped/24_gemm_grouped --m=256 --n=256 --k=256 --verbose=true --iterations=1 --reference-check=false\n\n";
return out;
}
/// Compute performance in GFLOP/s
double gflops(double runtime_s) const {
// Number of real-valued multiply-adds
int64_t fmas = int64_t();
for (auto const & problem : problem_sizes) {
fmas += problem.product();
}
// Two flops per multiply-add
return 2.0 * double(fmas) / double(1.0e9) / runtime_s;
}
};
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Gemm, typename GemmBatched>
class TestbedGrouped {
public:
//
// Type definitions
//
using ElementA = typename Gemm::ElementA;
using ElementB = typename Gemm::ElementB;
using ElementC = typename Gemm::ElementC;
using ElementAccumulator = typename Gemm::ElementAccumulator;
using EpilogueOutputOp = typename Gemm::GemmKernel::Epilogue::OutputOp;
using ElementCompute = typename EpilogueOutputOp::ElementCompute;
using LayoutA = typename Gemm::LayoutA;
using LayoutB = typename Gemm::LayoutB;
using LayoutC = typename Gemm::LayoutC;
using MatrixCoord = typename LayoutC::TensorCoord;
private:
//
// Data members
//
Options & options;
/// Initialization
cutlass::Distribution::Kind init_A;
cutlass::Distribution::Kind init_B;
cutlass::Distribution::Kind init_C;
uint32_t seed;
cutlass::DeviceAllocation<cutlass::gemm::GemmCoord> problem_sizes_device;
std::vector<int64_t> offset_A;
std::vector<int64_t> offset_B;
std::vector<int64_t> offset_C;
std::vector<int64_t> offset_D;
std::vector<int64_t> lda_host;
std::vector<int64_t> ldb_host;
std::vector<int64_t> ldc_host;
std::vector<int64_t> ldd_host;
cutlass::DeviceAllocation<int64_t> lda;
cutlass::DeviceAllocation<int64_t> ldb;
cutlass::DeviceAllocation<int64_t> ldc;
cutlass::DeviceAllocation<int64_t> ldd;
cutlass::DeviceAllocation<ElementA> block_A;
cutlass::DeviceAllocation<ElementB> block_B;
cutlass::DeviceAllocation<ElementC> block_C;
cutlass::DeviceAllocation<ElementC> block_D;
cutlass::DeviceAllocation<ElementA *> ptr_A;
cutlass::DeviceAllocation<ElementB *> ptr_B;
cutlass::DeviceAllocation<ElementC *> ptr_C;
cutlass::DeviceAllocation<ElementC *> ptr_D;
public:
//
// Methods
//
TestbedGrouped(
Options &options_,
cutlass::Distribution::Kind init_A_ = cutlass::Distribution::Uniform,
cutlass::Distribution::Kind init_B_ = cutlass::Distribution::Uniform,
cutlass::Distribution::Kind init_C_ = cutlass::Distribution::Uniform,
uint32_t seed_ = 3080
):
options(options_), init_A(init_A_), init_B(init_B_), init_C(init_C_), seed(seed_) { }
int problem_count() const {
return options.problem_count;
}
private:
/// Helper to initialize a tensor view
template <typename Element>
void initialize_tensor_(
Element *ptr,
size_t capacity,
cutlass::Distribution::Kind dist_kind,
uint32_t seed) {
if (dist_kind == cutlass::Distribution::Uniform) {
Element scope_max, scope_min;
int bits_input = cutlass::sizeof_bits<Element>::value;
int bits_output = cutlass::sizeof_bits<typename Gemm::ElementC>::value;
if (bits_input == 1) {
scope_max = 2;
scope_min = 0;
} else if (bits_input <= 8) {
scope_max = 2;
scope_min = -2;
} else if (bits_output == 16) {
if (cutlass::sizeof_bits<ElementAccumulator>::value <= 16) {
scope_max = 5;
scope_min = -5;
}
else {
scope_max = 8;
scope_min = -8;
}
} else {
scope_max = 8;
scope_min = -8;
}
cutlass::reference::device::BlockFillRandomUniform(
ptr, capacity, seed, scope_max, scope_min, 0);
}
else if (dist_kind == cutlass::Distribution::Gaussian) {
cutlass::reference::device::BlockFillRandomGaussian(
ptr, capacity, seed, Element(), Element(0.5f));
}
else if (dist_kind == cutlass::Distribution::Sequential) {
// Fill with increasing elements
cutlass::reference::device::BlockFillSequential(
ptr, capacity, Element(1), Element());
}
else {
// Fill with all 1s
cutlass::reference::device::BlockFillSequential(
ptr, capacity, Element(), Element(1));
}
}
/// Verbose printing of problem sizes
void print_problem_sizes_() {
// Print groups
std::cout << problem_count() << " groups:\n";
int32_t idx = 0;
int64_t total_tiles = 0;
for (auto const & problem : options.problem_sizes) {
int tiles =
((problem.m() + Gemm::ThreadblockShape::kM - 1) / Gemm::ThreadblockShape::kM) *
((problem.n() + Gemm::ThreadblockShape::kN - 1) / Gemm::ThreadblockShape::kN);
total_tiles += tiles;
std::cout << " [" << idx << "]: "
<< problem.m() << "-by-" << problem.n() << "-by-" << problem.k()
<< " (" << tiles << " threadblock tiles)" << "\n";
++idx;
}
// Print batched GEMM equivalent
size_t bin_idx = 0;
size_t problem_count_check = 0;
std::cout << "\nConventionally executed as " << options.problem_bins.size() << " batched GEMMs:\n";
for (auto const & bin : options.problem_bins) {
std::cout << " [" << bin_idx << "]: "
<< bin.first.m() << "-by-" << bin.first.n() << "-by-" << bin.first.k()
<< ", batch count: " << bin.second.size() << "\n";
++bin_idx;
problem_count_check += bin.second.size();
}
if (problem_count_check != problem_count()) {
std::cout << "\n***\nERROR in BINNING LOGIC!\n***\n" << std::endl;
}
}
/// Initializes data structures
void initialize_() {
//
// Choose random problem sizes
//
// construct a few problems of random sizes
srand(seed);
int64_t total_elements_A = 0;
int64_t total_elements_B = 0;
int64_t total_elements_C = 0;
int64_t total_elements_D = 0;
lda_host.resize(problem_count());
ldb_host.resize(problem_count());
ldc_host.resize(problem_count());
ldd_host.resize(problem_count());
for (int32_t i = 0; i < problem_count(); ++i) {
auto problem = options.problem_sizes.at(i);
lda_host.at(i) = LayoutA::packed({problem.m(), problem.k()}).stride(0);
ldb_host.at(i) = LayoutB::packed({problem.k(), problem.n()}).stride(0);
ldc_host.at(i) = LayoutC::packed({problem.m(), problem.n()}).stride(0);
ldd_host.at(i) = LayoutC::packed({problem.m(), problem.n()}).stride(0);
offset_A.push_back(total_elements_A);
offset_B.push_back(total_elements_B);
offset_C.push_back(total_elements_C);
offset_D.push_back(total_elements_D);
int64_t elements_A = problem.m() * problem.k();
int64_t elements_B = problem.k() * problem.n();
int64_t elements_C = problem.m() * problem.n();
int64_t elements_D = problem.m() * problem.n();
total_elements_A += elements_A;
total_elements_B += elements_B;
total_elements_C += elements_C;
total_elements_D += elements_D;
}
problem_sizes_device.reset(problem_count());
problem_sizes_device.copy_from_host(options.problem_sizes.data());
lda.reset(problem_count());
ldb.reset(problem_count());
ldc.reset(problem_count());
ldd.reset(problem_count());
lda.copy_from_host(lda_host.data());
ldb.copy_from_host(ldb_host.data());
ldc.copy_from_host(ldc_host.data());
ldd.copy_from_host(ldd_host.data());
//
// Assign pointers
//
block_A.reset(total_elements_A);
block_B.reset(total_elements_B);
block_C.reset(total_elements_C);
block_D.reset(total_elements_D);
std::vector<ElementA *> ptr_A_host(problem_count());
std::vector<ElementB *> ptr_B_host(problem_count());
std::vector<ElementC *> ptr_C_host(problem_count());
std::vector<ElementC *> ptr_D_host(problem_count());
for (int32_t i = 0; i < problem_count(); ++i) {
ptr_A_host.at(i) = block_A.get() + offset_A.at(i);
ptr_B_host.at(i) = block_B.get() + offset_B.at(i);
ptr_C_host.at(i) = block_C.get() + offset_C.at(i);
ptr_D_host.at(i) = block_D.get() + offset_D.at(i);
}
ptr_A.reset(problem_count());
ptr_A.copy_from_host(ptr_A_host.data());
ptr_B.reset(problem_count());
ptr_B.copy_from_host(ptr_B_host.data());
ptr_C.reset(problem_count());
ptr_C.copy_from_host(ptr_C_host.data());
ptr_D.reset(problem_count());
ptr_D.copy_from_host(ptr_D_host.data());
//
// Initialize the problems of the workspace
//
initialize_tensor_(block_A.get(), total_elements_A, init_A, seed * 2021);
initialize_tensor_(block_B.get(), total_elements_B, init_B, seed * 2022);
initialize_tensor_(block_C.get(), total_elements_C, init_C, seed * 2023);
cutlass::reference::device::BlockFillSequential(
block_D.get(), total_elements_D, ElementC(), ElementC());
}
/// Verifies the result is a GEMM
bool verify_() {
bool passed = true;
for (int32_t i = 0; i < problem_count(); ++i) {
cutlass::gemm::GemmCoord problem = options.problem_sizes.at(i);
LayoutA layout_A(lda_host.at(i));
LayoutB layout_B(ldb_host.at(i));
LayoutC layout_C(ldc_host.at(i));
LayoutC layout_D(ldd_host.at(i));
MatrixCoord extent_A{problem.m(), problem.k()};
MatrixCoord extent_B{problem.k(), problem.n()};
MatrixCoord extent_C{problem.m(), problem.n()};
cutlass::TensorView<ElementA, LayoutA> view_A(block_A.get() + offset_A.at(i), layout_A, extent_A);
cutlass::TensorView<ElementB, LayoutB> view_B(block_B.get() + offset_B.at(i), layout_B, extent_B);
cutlass::TensorView<ElementC, LayoutC> view_C(block_C.get() + offset_C.at(i), layout_C, extent_C);
cutlass::DeviceAllocation<ElementC> block_Ref(layout_D.capacity(extent_C));
cutlass::TensorView<ElementC, LayoutC> view_Ref_device(block_Ref.get(), layout_D, extent_C);
// Reference GEMM
cutlass::reference::device::GemmComplex<
ElementA, LayoutA,
ElementB, LayoutB,
ElementC, LayoutC,
ElementCompute, ElementAccumulator
>(
problem,
options.alpha,
view_A,
Gemm::kTransformA,
view_B,
Gemm::kTransformB,
options.beta,
view_C,
view_Ref_device,
ElementAccumulator(0)
);
// Copy to host memory
std::vector<ElementC> matrix_D(layout_D.capacity(extent_C));
std::vector<ElementC> matrix_Ref(layout_D.capacity(extent_C));
cutlass::device_memory::copy_to_host(matrix_D.data(), block_D.get() + offset_D.at(i), matrix_D.size());
cutlass::device_memory::copy_to_host(matrix_Ref.data(), block_Ref.get(), matrix_D.size());
cutlass::TensorView<ElementC, LayoutC> view_D( matrix_D.data(), layout_D, extent_C);
cutlass::TensorView<ElementC, LayoutC> view_Ref(matrix_Ref.data(), layout_D, extent_C);
// Reference check
passed = cutlass::reference::host::TensorEquals(view_D, view_Ref);
if (!passed) {
std::cerr << "\n***\nError - problem " << i << " failed the QA check\n***\n" << std::endl;
return passed;
}
}
return passed;
}
public:
/// Returns the number of threadblocks to launch if the kernel can run on the target
/// device. Otherwise, returns zero.
int sufficient() const {
cudaDeviceProp properties;
int device_idx;
cudaError_t result = cudaGetDevice(&device_idx);
if (result != cudaSuccess) {
throw std::runtime_error("cudaGetDevice() API call failed.");
}
result = cudaGetDeviceProperties(&properties, device_idx);
if (result != cudaSuccess) {
throw std::runtime_error("cudaGetDeviceProperties() failed");
}
int occupancy = Gemm::maximum_active_blocks();
return properties.multiProcessorCount * occupancy;
}
/// Executes a Grouped GEMM kernel and measures runtime.
Result profile_grouped() {
Result result;
int threadblock_count = sufficient();
// Early exit
if (!threadblock_count) {
std::cout << "Active CUDA device lacks hardware resources to run CUTLASS Grouped GEMM kernel." << std::endl;
return result;
}
if (options.verbose) {
print_problem_sizes_();
}
result.passed = false;
// Initialize the problem
initialize_();
// Configure the GEMM arguments
typename EpilogueOutputOp::Params epilogue_op(options.alpha, options.beta);
// Configure GEMM arguments
typename Gemm::Arguments args(
problem_sizes_device.get(),
problem_count(),
threadblock_count,
epilogue_op,
ptr_A.get(),
ptr_B.get(),
ptr_C.get(),
ptr_D.get(),
lda.get(),
ldb.get(),
ldc.get(),
ldd.get()
);
// Initialize the GEMM object
Gemm gemm;
result.status = gemm.initialize(args);
if (result.status != cutlass::Status::kSuccess) {
std::cerr << "Failed to initialize CUTLASS Grouped GEMM kernel." << std::endl;
return result;
}
// Run the grouped GEMM object
result.status = gemm.run();
if (result.status != cutlass::Status::kSuccess) {
std::cerr << "Failed to run CUTLASS Grouped GEMM kernel." << std::endl;
return result;
}
// Wait for completion
result.error = cudaDeviceSynchronize();
if (result.error != cudaSuccess) {
std::cerr << "Kernel execution error: " << cudaGetErrorString(result.error);
return result;
}
//
// Verify correctness
//
result.passed = true;
if (options.reference_check) {
result.passed = verify_();
}
//
// Warm-up run of the grouped GEMM object
//
result.status = gemm.run();
if (result.status != cutlass::Status::kSuccess) {
std::cerr << "Failed to run CUTLASS Grouped GEMM kernel." << std::endl;
return result;
}
//
// Construct events
//
cudaEvent_t events[2];
for (auto & event : events) {
result.error = cudaEventCreate(&event);
if (result.error != cudaSuccess) {
std::cerr << "cudaEventCreate() failed: " << cudaGetErrorString(result.error) << std::endl;
return -1;
}
}
// Record an event at the start of a series of GEMM operations
result.error = cudaEventRecord(events[0]);
if (result.error != cudaSuccess) {
std::cerr << "cudaEventRecord() failed: " << cudaGetErrorString(result.error) << std::endl;
return result;
}
//
// Run profiling loop
//
for (int iter = 0; iter < options.iterations; ++iter) {
gemm();
}
//
// Stop profiling loop
//
// Record an event when the GEMM operations have been launched.
result.error = cudaEventRecord(events[1]);
if (result.error != cudaSuccess) {
std::cerr << "cudaEventRecord() failed: " << cudaGetErrorString(result.error) << std::endl;
return result;
}
// Wait for work on the device to complete.
result.error = cudaEventSynchronize(events[1]);
if (result.error != cudaSuccess) {
std::cerr << "cudaEventSynchronize() failed: " << cudaGetErrorString(result.error) << std::endl;
return result;
}
// Measure elapsed runtime
float runtime_ms = 0;
result.error = cudaEventElapsedTime(&runtime_ms, events[0], events[1]);
if (result.error != cudaSuccess) {
std::cerr << "cudaEventElapsed() failed: " << cudaGetErrorString(result.error) << std::endl;
return result;
}
// Compute average runtime and GFLOPs.
result.runtime_ms = double(runtime_ms) / double(options.iterations);
result.gflops = options.gflops(result.runtime_ms / 1000.0);
//
// Cleanup
//
for (auto event : events) {
(void)cudaEventDestroy(event);
}
int32_t idx = 0;
int64_t total_tiles = 0;
for (auto const & problem : options.problem_sizes) {
int tiles =
((problem.m() + Gemm::ThreadblockShape::kM - 1) / Gemm::ThreadblockShape::kM) *
((problem.n() + Gemm::ThreadblockShape::kN - 1) / Gemm::ThreadblockShape::kN);
total_tiles += tiles;
++idx;
}
std::cout << std::endl;
std::cout << "Grouped GEMM (CUTLASS):\n"
<< "====================================================" << std::endl;
std::cout << " " << total_tiles << " total threadblock tiles." << std::endl;
std::cout << std::endl;
std::cout << " " << "Grouped Runtime: " << result.runtime_ms << " ms" << std::endl;
std::cout << " " << "Grouped GFLOPs: " << result.gflops << std::endl;
if (options.output_file.good()) {
options.output_file << options.output_tag << ",CUTLASS,grouped,"
<< problem_count() << "," << result.runtime_ms << "," << result.gflops << std::endl;
}
return result;
}
/// Executes a conventional batched GEMM kernel.
Result profile_batched() {
Result result;
result.passed = false;
//
// Prepare batched GEMM environment
//
int32_t effective_streams = (options.cuda_streams ? options.cuda_streams : 1);
// Array of leading dimensions used by batched GEMM calls
std::vector<cutlass::gemm::GemmCoord> bin_problem_sizes;
std::vector<int32_t> bin_count;
std::vector<int32_t> bin_ldm_A;
std::vector<int32_t> bin_ldm_B;
std::vector<int32_t> bin_ldm_C;
std::vector<int32_t> bin_start;
std::vector<void const *> ptr_A_batched_host;
std::vector<void const *> ptr_B_batched_host;
std::vector<void *> ptr_C_batched_host;
for (auto const & bin : options.problem_bins) {
int first_idx = bin.second.front();
bin_problem_sizes.push_back(options.problem_sizes.at(first_idx));
bin_count.push_back(int32_t(bin.second.size()));
bin_ldm_A.push_back(static_cast<int32_t>(lda_host.at(first_idx)));
bin_ldm_B.push_back(static_cast<int32_t>(ldb_host.at(first_idx)));
bin_ldm_C.push_back(static_cast<int32_t>(ldc_host.at(first_idx)));
if (ptr_A_batched_host.size() % 2) {
ptr_A_batched_host.push_back(nullptr);
ptr_B_batched_host.push_back(nullptr);