src/nb/reuse_allocator_benchmark.cc - cobalt - Git at Google

 /*
  * Copyright 2016 Google Inc. All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <map>
 #include <sstream>
 #include <string>
 #include <vector>

 #include "nb/allocator.h"
 #include "nb/allocator_decorator.h"
 #include "nb/fixed_no_free_allocator.h"
 #include "nb/reuse_allocator.h"
 #include "starboard/client_porting/wrap_main/wrap_main.h"
 #include "starboard/event.h"
 #include "starboard/file.h"
 #include "starboard/log.h"
 #include "starboard/memory.h"
 #include "starboard/system.h"
 #include "starboard/time.h"
 #include "starboard/types.h"

 namespace {

 inline bool IsAligned(void* ptr, std::size_t boundary) {
   uintptr_t ptr_as_int = reinterpret_cast<uintptr_t>(ptr);
   return ptr_as_int % boundary == 0;
 }

 // An allocation or free.
 // We use 'id' rather than raw pointer since the pointer values are
 // meaningless across runs.
 struct AllocationCommand {
   uint32_t id;
   uint32_t size;
   uint32_t alignment;
 };

 std::string ReadFileContent(const std::string& pathname) {
   SB_DLOG(ERROR) << pathname;
   SbFile file =
       SbFileOpen(pathname.c_str(), kSbFileOpenOnly | kSbFileRead, NULL, NULL);
   SB_DCHECK(SbFileIsValid(file));
   SbFileInfo file_info;
   bool result = SbFileGetInfo(file, &file_info);
   SB_DCHECK(result);

   std::vector<char> buffer(file_info.size);
   int bytes_read = SbFileRead(file, &buffer[0], buffer.size());
   SB_DCHECK(bytes_read == file_info.size);
   SbFileClose(file);

   return std::string(buffer.begin(), buffer.end());
 }

 void LoadAllocationPlayback(std::vector<AllocationCommand>* commands,
                             const std::string& filename) {
   char buffer[SB_FILE_MAX_NAME * 16];
   bool result = SbSystemGetPath(kSbSystemPathSourceDirectory, buffer,
                                 SB_ARRAY_SIZE(buffer));
   SB_DCHECK(result);
   std::string path_name = buffer;
   path_name += SB_FILE_SEP_CHAR;
   path_name += "nb";
   path_name += SB_FILE_SEP_CHAR;
   path_name += "testdata";
   path_name += SB_FILE_SEP_CHAR;
   path_name += filename;

   std::map<uint64_t, uint32_t> address_map;
   // Parse each line of this playback file.
   // Each line is a 64-bit hex address, and a 32-bit size and alignment.
   std::stringstream file_stream(ReadFileContent(path_name));

   std::string line;
   int address_id_counter = 0;
   while (std::getline(file_stream, line)) {
     if (!line.empty() && *line.rbegin() == '\n') {
       line.resize(line.size() - 1);
     }
     // Skip empty lines and comments.
     if (line.empty() || line[0] == '#') {
       continue;
     }

     uint64_t address;
     uint32_t size;
     uint32_t alignment;
     std::stringstream line_stream(line);
     line_stream << std::hex;
     line_stream >> address;
     line_stream << std::dec;
     line_stream >> size >> alignment;
     SB_DCHECK(address != 0);
     // Convert the addresses into unique IDs. We don't
     // really care what the values are, just need to match up
     // allocations with frees.
     int cur_address_id;
     std::map<uint64_t, uint32_t>::iterator it = address_map.find(address);
     if (it != address_map.end()) {
       cur_address_id = (*it).second;
     } else {
       cur_address_id = address_id_counter++;
       address_map[address] = cur_address_id;
     }

     AllocationCommand cmd;
     cmd.id = cur_address_id;
     cmd.size = size;
     cmd.alignment = alignment;
     commands->push_back(cmd);
   }
 }

 void ReplayCommands(nb::Allocator* allocator,
                     const std::vector<AllocationCommand>& commands,
                     SbTimeMonotonic* elapsed_time,
                     std::size_t* actual_bytes_used,
                     std::size_t* actual_high_water_mark,
                     std::size_t* allocator_bytes_used) {
   SbTimeMonotonic start = SbTimeGetMonotonicNow();
   // Execute each command in commands vector.
   // Record total bytes allocated and report.

   // Map from allocation IDs to pointers returned by the allocator.
   std::map<uint32_t, void*> address_table;
   // Map from allocation IDs to size requested.
   std::map<uint32_t, std::size_t> size_table;
   // How many bytes have we actually requested.
   std::size_t cur_bytes_allocated = 0;

   for (std::vector<AllocationCommand>::const_iterator iter = commands.begin();
        iter != commands.end(); ++iter) {
     const AllocationCommand& cmd = *iter;
     bool is_free = cmd.size == 0 && cmd.alignment == 0;
     if (!is_free) {
       void* ptr = allocator->Allocate(cmd.size, cmd.alignment);
       SB_DCHECK(IsAligned(ptr, cmd.alignment));
       cur_bytes_allocated += cmd.size;
       *actual_high_water_mark =
           std::max(*actual_high_water_mark, cur_bytes_allocated);
       size_table[cmd.id] = cmd.size;
       SB_DCHECK(address_table.find(cmd.id) == address_table.end());
       address_table[cmd.id] = ptr;
     } else {
       std::map<uint32_t, void*>::iterator it = address_table.find(cmd.id);
       SB_DCHECK(it != address_table.end());
       void* ptr = it->second;
       allocator->Free(ptr);
       cur_bytes_allocated -= size_table[cmd.id];
       address_table.erase(it);
     }
   }
   SbTimeMonotonic end = SbTimeGetMonotonicNow();
   *elapsed_time = end - start;
   *actual_bytes_used = cur_bytes_allocated;
   *allocator_bytes_used = allocator->GetAllocated();

   // Free any remaining allocations.
   for (std::map<uint32_t, void*>::iterator it = address_table.begin();
        it != address_table.end(); ++it) {
     allocator->Free(it->second);
   }
 }

 class DefaultAllocator : public nb::Allocator {
  public:
   void* Allocate(std::size_t size) { return Allocate(size, 0); }
   void* Allocate(std::size_t size, std::size_t alignment) {
     return SbMemoryAllocateAligned(alignment, size);
   }
   void* AllocateForAlignment(std::size_t size, std::size_t alignment) {
     return SbMemoryAllocateAligned(alignment, size);
   }
   void Free(void* memory) { SbMemoryFree(memory); }
   std::size_t GetCapacity() const { return 0; }
   std::size_t GetAllocated() const { return 0; }
   void PrintAllocations() const {}
 };

 void MemoryPlaybackTest(const std::string& filename) {
   const std::size_t kFixedNoFreeMemorySize = 512 * 1024 * 1024;
   void* fixed_no_free_memory = SbMemoryAllocate(kFixedNoFreeMemorySize);
   nb::FixedNoFreeAllocator fallback_allocator(fixed_no_free_memory,
                                               kFixedNoFreeMemorySize);
   nb::ReuseAllocator reuse_allocator(&fallback_allocator);

   std::vector<AllocationCommand> commands;
   LoadAllocationPlayback(&commands, filename);

   std::size_t actual_bytes_used = 0;
   std::size_t actual_high_water_mark = 0;
   std::size_t allocator_bytes_used = 0;
   SbTimeMonotonic elapsed_time;
   ReplayCommands(&reuse_allocator, commands, &elapsed_time, &actual_bytes_used,
                  &actual_high_water_mark, &allocator_bytes_used);
   std::size_t allocator_high_water_mark = reuse_allocator.GetCapacity();
   SB_DLOG(INFO) << "Actual used: " << actual_bytes_used;
   SB_DLOG(INFO) << "Actual high water mark: " << actual_high_water_mark;
   SB_DLOG(INFO) << "Allocator used: " << allocator_bytes_used;
   SB_DLOG(INFO) << "Allocator high water mark: " << allocator_high_water_mark;
   SB_DLOG(INFO) << "Elapsed (ms): " << elapsed_time / kSbTimeMillisecond;

   SbMemoryFree(fixed_no_free_memory);

   // Test again using the system allocator, to compare performance.
   DefaultAllocator default_allocator;
   ReplayCommands(&default_allocator, commands, &elapsed_time,
                  &actual_bytes_used, &actual_high_water_mark,
                  &allocator_bytes_used);
   SB_DLOG(INFO) << "Default allocator elapsed (ms): "
                 << elapsed_time / kSbTimeMillisecond;
 }

 int BenchmarkMain(int argc, char** argv) {
   const char* kBenchmarks[] = {
       "mem_history_cobalt.txt", "mem_history_gpu.txt", "mem_history_main.txt",
   };

   for (std::size_t i = 0; i < SB_ARRAY_SIZE(kBenchmarks); ++i) {
     SB_DLOG(INFO) << "Memory playback test: " << kBenchmarks[i];
     MemoryPlaybackTest(kBenchmarks[i]);
   }

   return 0;
 }

 }  // namespace

 STARBOARD_WRAP_SIMPLE_MAIN(BenchmarkMain);
	/*
	* Copyright 2016 Google Inc. All Rights Reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <map>
	#include <sstream>
	#include <string>
	#include <vector>

	#include "nb/allocator.h"
	#include "nb/allocator_decorator.h"
	#include "nb/fixed_no_free_allocator.h"
	#include "nb/reuse_allocator.h"
	#include "starboard/client_porting/wrap_main/wrap_main.h"
	#include "starboard/event.h"
	#include "starboard/file.h"
	#include "starboard/log.h"
	#include "starboard/memory.h"
	#include "starboard/system.h"
	#include "starboard/time.h"
	#include "starboard/types.h"

	namespace {

	inline bool IsAligned(void* ptr, std::size_t boundary) {
	uintptr_t ptr_as_int = reinterpret_cast<uintptr_t>(ptr);
	return ptr_as_int % boundary == 0;
	}

	// An allocation or free.
	// We use 'id' rather than raw pointer since the pointer values are
	// meaningless across runs.
	struct AllocationCommand {
	uint32_t id;
	uint32_t size;
	uint32_t alignment;
	};

	std::string ReadFileContent(const std::string& pathname) {
	SB_DLOG(ERROR) << pathname;
	SbFile file =
	SbFileOpen(pathname.c_str(), kSbFileOpenOnly \| kSbFileRead, NULL, NULL);
	SB_DCHECK(SbFileIsValid(file));
	SbFileInfo file_info;
	bool result = SbFileGetInfo(file, &file_info);
	SB_DCHECK(result);

	std::vector<char> buffer(file_info.size);
	int bytes_read = SbFileRead(file, &buffer[0], buffer.size());
	SB_DCHECK(bytes_read == file_info.size);
	SbFileClose(file);

	return std::string(buffer.begin(), buffer.end());
	}

	void LoadAllocationPlayback(std::vector<AllocationCommand>* commands,
	const std::string& filename) {
	char buffer[SB_FILE_MAX_NAME * 16];
	bool result = SbSystemGetPath(kSbSystemPathSourceDirectory, buffer,
	SB_ARRAY_SIZE(buffer));
	SB_DCHECK(result);
	std::string path_name = buffer;
	path_name += SB_FILE_SEP_CHAR;
	path_name += "nb";
	path_name += SB_FILE_SEP_CHAR;
	path_name += "testdata";
	path_name += SB_FILE_SEP_CHAR;
	path_name += filename;

	std::map<uint64_t, uint32_t> address_map;
	// Parse each line of this playback file.
	// Each line is a 64-bit hex address, and a 32-bit size and alignment.
	std::stringstream file_stream(ReadFileContent(path_name));

	std::string line;
	int address_id_counter = 0;
	while (std::getline(file_stream, line)) {
	if (!line.empty() && *line.rbegin() == '\n') {
	line.resize(line.size() - 1);
	}
	// Skip empty lines and comments.
	if (line.empty() \|\| line[0] == '#') {
	continue;
	}

	uint64_t address;
	uint32_t size;
	uint32_t alignment;
	std::stringstream line_stream(line);
	line_stream << std::hex;
	line_stream >> address;
	line_stream << std::dec;
	line_stream >> size >> alignment;
	SB_DCHECK(address != 0);
	// Convert the addresses into unique IDs. We don't
	// really care what the values are, just need to match up
	// allocations with frees.
	int cur_address_id;
	std::map<uint64_t, uint32_t>::iterator it = address_map.find(address);
	if (it != address_map.end()) {
	cur_address_id = (*it).second;
	} else {
	cur_address_id = address_id_counter++;
	address_map[address] = cur_address_id;
	}

	AllocationCommand cmd;
	cmd.id = cur_address_id;
	cmd.size = size;
	cmd.alignment = alignment;
	commands->push_back(cmd);
	}
	}

	void ReplayCommands(nb::Allocator* allocator,
	const std::vector<AllocationCommand>& commands,
	SbTimeMonotonic* elapsed_time,
	std::size_t* actual_bytes_used,
	std::size_t* actual_high_water_mark,
	std::size_t* allocator_bytes_used) {
	SbTimeMonotonic start = SbTimeGetMonotonicNow();
	// Execute each command in commands vector.
	// Record total bytes allocated and report.

	// Map from allocation IDs to pointers returned by the allocator.
	std::map<uint32_t, void*> address_table;
	// Map from allocation IDs to size requested.
	std::map<uint32_t, std::size_t> size_table;
	// How many bytes have we actually requested.
	std::size_t cur_bytes_allocated = 0;

	for (std::vector<AllocationCommand>::const_iterator iter = commands.begin();
	iter != commands.end(); ++iter) {
	const AllocationCommand& cmd = *iter;
	bool is_free = cmd.size == 0 && cmd.alignment == 0;
	if (!is_free) {
	void* ptr = allocator->Allocate(cmd.size, cmd.alignment);
	SB_DCHECK(IsAligned(ptr, cmd.alignment));
	cur_bytes_allocated += cmd.size;
	*actual_high_water_mark =
	std::max(*actual_high_water_mark, cur_bytes_allocated);
	size_table[cmd.id] = cmd.size;
	SB_DCHECK(address_table.find(cmd.id) == address_table.end());
	address_table[cmd.id] = ptr;
	} else {
	std::map<uint32_t, void*>::iterator it = address_table.find(cmd.id);
	SB_DCHECK(it != address_table.end());
	void* ptr = it->second;
	allocator->Free(ptr);
	cur_bytes_allocated -= size_table[cmd.id];
	address_table.erase(it);
	}
	}
	SbTimeMonotonic end = SbTimeGetMonotonicNow();
	*elapsed_time = end - start;
	*actual_bytes_used = cur_bytes_allocated;
	*allocator_bytes_used = allocator->GetAllocated();

	// Free any remaining allocations.
	for (std::map<uint32_t, void*>::iterator it = address_table.begin();
	it != address_table.end(); ++it) {
	allocator->Free(it->second);
	}
	}

	class DefaultAllocator : public nb::Allocator {
	public:
	void* Allocate(std::size_t size) { return Allocate(size, 0); }
	void* Allocate(std::size_t size, std::size_t alignment) {
	return SbMemoryAllocateAligned(alignment, size);
	}
	void* AllocateForAlignment(std::size_t size, std::size_t alignment) {
	return SbMemoryAllocateAligned(alignment, size);
	}
	void Free(void* memory) { SbMemoryFree(memory); }
	std::size_t GetCapacity() const { return 0; }
	std::size_t GetAllocated() const { return 0; }
	void PrintAllocations() const {}
	};

	void MemoryPlaybackTest(const std::string& filename) {
	const std::size_t kFixedNoFreeMemorySize = 512 * 1024 * 1024;
	void* fixed_no_free_memory = SbMemoryAllocate(kFixedNoFreeMemorySize);
	nb::FixedNoFreeAllocator fallback_allocator(fixed_no_free_memory,
	kFixedNoFreeMemorySize);
	nb::ReuseAllocator reuse_allocator(&fallback_allocator);

	std::vector<AllocationCommand> commands;
	LoadAllocationPlayback(&commands, filename);

	std::size_t actual_bytes_used = 0;
	std::size_t actual_high_water_mark = 0;
	std::size_t allocator_bytes_used = 0;
	SbTimeMonotonic elapsed_time;
	ReplayCommands(&reuse_allocator, commands, &elapsed_time, &actual_bytes_used,
	&actual_high_water_mark, &allocator_bytes_used);
	std::size_t allocator_high_water_mark = reuse_allocator.GetCapacity();
	SB_DLOG(INFO) << "Actual used: " << actual_bytes_used;
	SB_DLOG(INFO) << "Actual high water mark: " << actual_high_water_mark;
	SB_DLOG(INFO) << "Allocator used: " << allocator_bytes_used;
	SB_DLOG(INFO) << "Allocator high water mark: " << allocator_high_water_mark;
	SB_DLOG(INFO) << "Elapsed (ms): " << elapsed_time / kSbTimeMillisecond;

	SbMemoryFree(fixed_no_free_memory);

	// Test again using the system allocator, to compare performance.
	DefaultAllocator default_allocator;
	ReplayCommands(&default_allocator, commands, &elapsed_time,
	&actual_bytes_used, &actual_high_water_mark,
	&allocator_bytes_used);
	SB_DLOG(INFO) << "Default allocator elapsed (ms): "
	<< elapsed_time / kSbTimeMillisecond;
	}

	int BenchmarkMain(int argc, char** argv) {
	const char* kBenchmarks[] = {
	"mem_history_cobalt.txt", "mem_history_gpu.txt", "mem_history_main.txt",
	};

	for (std::size_t i = 0; i < SB_ARRAY_SIZE(kBenchmarks); ++i) {
	SB_DLOG(INFO) << "Memory playback test: " << kBenchmarks[i];
	MemoryPlaybackTest(kBenchmarks[i]);
	}

	return 0;
	}

	} // namespace

	STARBOARD_WRAP_SIMPLE_MAIN(BenchmarkMain);