Variable size buffer management

benchmarks/CMakeLists.txt

@@ -24,7 +24,25 @@ add_executable(timestamp timestamp.cpp)
 target_include_directories(timestamp PUBLIC ../catkit_core)
 target_link_libraries(timestamp PUBLIC catkit_core)
 
+# Free list allocator benchmark
+add_executable(free_list_allocator free_list_allocator.cpp)
+target_include_directories(free_list_allocator PUBLIC ../catkit_core)
+target_link_libraries(free_list_allocator PUBLIC catkit_core)
+
+# Pool allocator benchmark
+add_executable(pool_allocator pool_allocator.cpp)
+target_include_directories(pool_allocator PUBLIC ../catkit_core)
+target_link_libraries(pool_allocator PUBLIC catkit_core)
+
+# Hash map benchmark
+add_executable(hash_map hash_map.cpp)
+target_include_directories(hash_map PUBLIC ../catkit_core)
+target_link_libraries(hash_map PUBLIC catkit_core)
+
 # Add install files
 install(TARGETS datastream_latency DESTINATION bin)
 install(TARGETS datastream_submit DESTINATION bin)
 install(TARGETS timestamp DESTINATION bin)
+install(TARGETS free_list_allocator DESTINATION bin)
+install(TARGETS pool_allocator DESTINATION bin)
+install(TARGETS hash_map DESTINATION bin)

benchmarks/free_list_allocator.cpp

@@ -0,0 +1,141 @@
+#include "FreeListAllocator.h"
+#include "Timing.h"
+#include <iostream>
+
+void benchmark_linux_scalability()
+{
+	const size_t N = 10000000;
+
+	const size_t NUM_BLOCKS = N * 2;
+	const size_t ALIGNMENT = 32;
+
+	auto *handles = new FreeListAllocator::BlockHandle[N];
+
+	size_t buffer_size = FreeListAllocator::ComputeMetadataBufferSize(NUM_BLOCKS);
+	char *buffer = new char[buffer_size];
+
+	auto allocator = FreeListAllocator::Create(buffer, NUM_BLOCKS, ALIGNMENT, NUM_BLOCKS * ALIGNMENT);
+
+	auto start = GetTimeStamp();
+
+	for (size_t i = 0; i < N; ++i)
+	{
+		handles[i] = allocator->Allocate(16);
+	}
+
+	for (size_t i = 0; i < N; ++i)
+	{
+		allocator->Deallocate(handles[i]);
+	}
+
+	auto end = GetTimeStamp();
+
+	std::cout << "Linux Scalability:" << std::endl;
+	std::cout << "Time: " << (end - start) / 1e9 << " sec" << std::endl;
+	std::cout << "Throughput: " << 2 * N / ((end - start) / 1e9) << " ops/s" << std::endl;
+    std::cout << "Time per operation: " << (end - start) / (2 * N) << " ns" << std::endl;
+
+	delete[] handles;
+	delete[] buffer;
+}
+
+void benchmark_threadtest()
+{
+	const size_t N = 100;
+	const size_t M = 100000;
+	const size_t NUM_BLOCKS = N * 2;
+	const size_t ALIGNMENT = 32;
+
+	auto *handles = new FreeListAllocator::BlockHandle[M];
+
+	size_t buffer_size = FreeListAllocator::ComputeMetadataBufferSize(NUM_BLOCKS);
+	char *buffer = new char[buffer_size];
+
+	auto allocator = FreeListAllocator::Create(buffer, NUM_BLOCKS, ALIGNMENT, NUM_BLOCKS * ALIGNMENT);
+
+	auto start = GetTimeStamp();
+
+	for (size_t i = 0; i < M; ++i)
+	{
+		for (size_t j = 0; j < N; ++j)
+		{
+			handles[j] = allocator->Allocate(16);
+		}
+
+		for (size_t j = 0; j < N; ++j)
+		{
+			allocator->Deallocate(handles[j]);
+		}
+	}
+
+	auto end = GetTimeStamp();
+
+	std::cout << "Threadtest:" << std::endl;
+	std::cout << "Time: " << (end - start) / 1e9 << " sec" << std::endl;
+	std::cout << "Throughput: " << 2 * N * M / ((end - start) / 1e9) << " ops/s" << std::endl;
+    std::cout << "Time per operation: " << (end - start) / (2 * N * M) << " ns" << std::endl;
+
+	delete[] handles;
+}
+
+void benchmark_larson()
+{
+	const size_t ALIGNMENT = 32;
+
+	const size_t N = 10000000;
+	const size_t M = 1000;
+	const size_t MIN_SIZE = 16;
+	const size_t MAX_SIZE = 128;
+	const size_t NUM_BLOCKS = M * 2;
+
+	auto *handles = new FreeListAllocator::BlockHandle[M];
+	for (size_t i = 0; i < M; ++i)
+	{
+		handles[i] = -1;
+	}
+
+	size_t buffer_size = FreeListAllocator::ComputeMetadataBufferSize(NUM_BLOCKS);
+	char *buffer = new char[buffer_size];
+
+	auto allocator = FreeListAllocator::Create(buffer, NUM_BLOCKS, ALIGNMENT, MAX_SIZE * NUM_BLOCKS);
+
+	auto *indices = new size_t[N];
+	auto *sizes = new size_t[N];
+	for (size_t i = 0; i < N; ++i)
+	{
+		indices[i] = rand() % M;
+		sizes[i] = (MIN_SIZE + (rand() % (MAX_SIZE - MIN_SIZE))) * ALIGNMENT;
+	}
+
+	auto start = GetTimeStamp();
+
+	for (size_t i = 0; i < N; ++i)
+	{
+		size_t index = indices[i];
+		size_t size = sizes[i];
+
+		if (handles[index] != -1)
+		{
+			allocator->Deallocate(handles[index]);
+		}
+
+		handles[index] = allocator->Allocate(size);
+	}
+
+	auto end = GetTimeStamp();
+	std::cout << "Larson benchmark:" << std::endl;
+	std::cout << "Time: " << (end - start) / 1e9 << " sec" << std::endl;
+	std::cout << "Throughput: " << (N * 2 - M) / ((end - start) / 1e9) << " ops/s" << std::endl;
+    std::cout << "Time per operation: " << (end - start) / (2 * N - M) << " ns" << std::endl;
+
+	delete[] handles;
+}
+
+int main(int argc, char **argv)
+{
+	benchmark_linux_scalability();
+	benchmark_threadtest();
+	benchmark_larson();
+
+	return 0;
+}

benchmarks/hash_map.cpp

@@ -0,0 +1,61 @@
+#include "HashMap.h"
+#include "Timing.h"
+
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+    typedef HashMap<uint16_t, 16384, 13> MyHashMap;
+
+    std::size_t buffer_size = MyHashMap::CalculateBufferSize();
+    std::cout << "Buffer size: " << buffer_size << " bytes" << std::endl;
+    char *buffer = new char[buffer_size];
+
+    MyHashMap map(buffer);
+    map.Initialize();
+
+    std::uint64_t total_time = 0;
+    std::size_t N = 5000;
+
+    for (size_t i = 0; i < N; ++i)
+    {
+        std::string key = "key" + std::to_string(i);
+
+        auto start = GetTimeStamp();
+        bool success = map.Insert(key, uint16_t(i));
+        auto end = GetTimeStamp();
+
+        if (!success)
+        {
+            std::cout << "Insertion failed." << std::endl;
+        }
+
+        total_time += end - start;
+    }
+
+    std::cout << "Insertion time: " << total_time / N << " ns" << std::endl;
+
+    total_time = 0;
+
+    for (size_t i = 0; i < N; ++i)
+    {
+        std::string key = "key" + std::to_string(i);
+
+        auto start = GetTimeStamp();
+        auto *value = map.Find(key);
+        auto end = GetTimeStamp();
+
+        if (value == nullptr || *value != i)
+        {
+            std::cout << "Key not found." << std::endl;
+        }
+
+        total_time += end - start;
+    }
+
+    std::cout << "Lookup time: " << total_time / N << " ns" << std::endl;
+
+    delete[] buffer;
+
+    return 0;
+}

benchmarks/pool_allocator.cpp

@@ -0,0 +1,44 @@
+#include "PoolAllocator.h"
+#include "Timing.h"
+#include <iostream>
+
+void benchmark_linux_scalability()
+{
+	const size_t N = 10000000;
+    const size_t CAPACITY = 2 * N;
+
+    char *buffer = new char[PoolAllocator::CalculateMetadataBufferSize(CAPACITY)];
+
+	auto allocator = PoolAllocator::Create(buffer, CAPACITY);
+
+	auto *handles = new PoolAllocator::BlockHandle[N];
+
+	auto start = GetTimeStamp();
+
+	for (size_t i = 0; i < N; ++i)
+	{
+		handles[i] = allocator->Allocate();
+	}
+
+	for (size_t i = 0; i < N; ++i)
+	{
+		allocator->Deallocate(handles[i]);
+	}
+
+	auto end = GetTimeStamp();
+
+	std::cout << "Linux Scalability:" << std::endl;
+	std::cout << "Time: " << (end - start) / 1e9 << " sec" << std::endl;
+	std::cout << "Throughput: " << 2 * N / ((end - start) / 1e9) << " ops/s" << std::endl;
+    std::cout << "Time per operation: " << (end - start) / (2 * N) << " ns" << std::endl;
+
+	delete[] handles;
+    delete[] buffer;
+}
+
+int main(int argc, char **argv)
+{
+	benchmark_linux_scalability();
+
+	return 0;
+}

catkit_core/CMakeLists.txt

@@ -33,6 +33,8 @@ add_library(catkit_core STATIC
     Tracing.cpp
     Types.cpp
     Util.cpp
+    PoolAllocator.cpp
+    FreeListAllocator.cpp
     proto/core.pb.cc
     proto/logging.pb.cc
     proto/testbed.pb.cc