static PooledByteBufferAllocator()
{
int defaultPageSize = SystemPropertyUtil.GetInt("io.netty.allocator.pageSize", 8192);
Exception pageSizeFallbackCause = null;
try
{
ValidateAndCalculatePageShifts(defaultPageSize);
}
catch (Exception t)
{
pageSizeFallbackCause = t;
defaultPageSize = 8192;
}
DefaultPageSize = defaultPageSize;
int defaultMaxOrder = SystemPropertyUtil.GetInt("io.netty.allocator.maxOrder", 11);
Exception maxOrderFallbackCause = null;
try
{
ValidateAndCalculateChunkSize(DefaultPageSize, defaultMaxOrder);
}
catch (Exception t)
{
maxOrderFallbackCause = t;
defaultMaxOrder = 11;
}
DefaultMaxOrder = defaultMaxOrder;
// todo: Determine reasonable default for heapArenaCount
// Assuming each arena has 3 chunks, the pool should not consume more than 50% of max memory.
// Use 2 * cores by default to reduce contention as we use 2 * cores for the number of EventLoops
// in NIO and EPOLL as well. If we choose a smaller number we will run into hotspots as allocation and
// deallocation needs to be synchronized on the PoolArena.
// See https://github.com/netty/netty/issues/3888
int defaultMinNumArena = Environment.ProcessorCount * 2;
DefaultNumHeapArena = Math.Max(0, SystemPropertyUtil.GetInt("io.netty.allocator.numHeapArenas", defaultMinNumArena));
DefaultNumDirectArena = Math.Max(0, SystemPropertyUtil.GetInt("io.netty.allocator.numDirectArenas", defaultMinNumArena));
// cache sizes
DefaultTinyCacheSize = SystemPropertyUtil.GetInt("io.netty.allocator.tinyCacheSize", 512);
DefaultSmallCacheSize = SystemPropertyUtil.GetInt("io.netty.allocator.smallCacheSize", 256);
DefaultNormalCacheSize = SystemPropertyUtil.GetInt("io.netty.allocator.normalCacheSize", 64);
// 32 kb is the default maximum capacity of the cached buffer. Similar to what is explained in
// 'Scalable memory allocation using jemalloc'
DefaultMaxCachedBufferCapacity = SystemPropertyUtil.GetInt("io.netty.allocator.maxCachedBufferCapacity", 32 * 1024);
// the number of threshold of allocations when cached entries will be freed up if not frequently used
DefaultCacheTrimInterval = SystemPropertyUtil.GetInt(
"io.netty.allocator.cacheTrimInterval", 8192);
Default = new PooledByteBufferAllocator(PlatformDependent.DirectBufferPreferred);
}
protected sealed override void Deallocate()
{
if (this.Handle >= 0)
{
long handle = this.Handle;
this.Handle = -1;
this.Memory = default(T);
this.Chunk.Arena.Free(this.Chunk, handle, this.MaxLength, this.Cache);
this.Chunk = null;
this.allocator = null;
this.Recycle();
}
}
internal IByteBuffer Allocate(PooledByteBufferAllocator allocator)
{
Debug.Assert(allocator is object);
#if DEBUG
if (Log.DebugEnabled)
{
Log.Debug("{} allocate, estimated size = {}", nameof(ReceiveBufferSizeEstimate), _receiveBufferSize);
}
#endif
return(allocator.Buffer(_receiveBufferSize));
}
void Init0(PoolChunk <T> chunk, long handle, int offset, int length, int maxLength, PoolThreadCache <T> cache)
{
Debug.Assert(handle >= 0);
Debug.Assert(chunk != null);
this.Chunk = chunk;
this.Memory = chunk.Memory;
this.allocator = chunk.Arena.Parent;
this.Cache = cache;
this.Handle = handle;
this.Offset = offset;
this.Length = length;
this.MaxLength = maxLength;
}
// TODO: Test if adding padding helps under contention
//private long pad0, pad1, pad2, pad3, pad4, pad5, pad6, pad7;
protected PoolArena(
PooledByteBufferAllocator parent,
int pageSize,
int maxOrder,
int pageShifts,
int chunkSize)
{
Parent = parent;
PageSize = pageSize;
_maxOrder = maxOrder;
PageShifts = pageShifts;
ChunkSize = chunkSize;
SubpageOverflowMask = ~(pageSize - 1);
_tinySubpagePools = NewSubpagePoolArray(NumTinySubpagePools);
for (int i = 0; i < _tinySubpagePools.Length; i++)
{
_tinySubpagePools[i] = NewSubpagePoolHead(pageSize);
}
NumSmallSubpagePools = pageShifts - 9;
_smallSubpagePools = NewSubpagePoolArray(NumSmallSubpagePools);
for (int i = 0; i < _smallSubpagePools.Length; i++)
{
_smallSubpagePools[i] = NewSubpagePoolHead(pageSize);
}
_q100 = new PoolChunkList <T>(this, null, 100, int.MaxValue, chunkSize);
_q075 = new PoolChunkList <T>(this, _q100, 75, 100, chunkSize);
_q050 = new PoolChunkList <T>(this, _q075, 50, 100, chunkSize);
_q025 = new PoolChunkList <T>(this, _q050, 25, 75, chunkSize);
_q000 = new PoolChunkList <T>(this, _q025, 1, 50, chunkSize);
_qInit = new PoolChunkList <T>(this, _q000, int.MinValue, 25, chunkSize);
_q100.PrevList(_q075);
_q075.PrevList(_q050);
_q050.PrevList(_q025);
_q025.PrevList(_q000);
_q000.PrevList(null);
_qInit.PrevList(_qInit);
var metrics = new List <IPoolChunkListMetric>(6);
metrics.Add(_qInit);
metrics.Add(_q000);
metrics.Add(_q025);
metrics.Add(_q050);
metrics.Add(_q075);
metrics.Add(_q100);
_chunkListMetrics = metrics;
}
unsafe void Init0(PoolChunk <T> chunk, long handle, int offset, int length, int maxLength, PoolThreadCache <T> cache)
{
Debug.Assert(handle >= 0);
Debug.Assert(chunk is object);
Chunk = chunk;
Memory = chunk.Memory;
_allocator = chunk.Arena.Parent;
Origin = chunk.NativePointer;
Cache = cache;
Handle = handle;
Offset = offset;
Length = length;
MaxLength = maxLength;
}
// TODO: Test if adding padding helps under contention
//private long pad0, pad1, pad2, pad3, pad4, pad5, pad6, pad7;
protected PoolArena(PooledByteBufferAllocator parent, int pageSize, int maxOrder, int pageShifts, int chunkSize, int maxChunkCount)
{
this.Parent = parent;
this.PageSize = pageSize;
this.maxOrder = maxOrder;
this.PageShifts = pageShifts;
this.ChunkSize = chunkSize;
this.maxChunkCount = maxChunkCount;
this.SubpageOverflowMask = ~(pageSize - 1);
this.tinySubpagePools = this.NewSubpagePoolArray(NumTinySubpagePools);
for (int i = 0; i < this.tinySubpagePools.Length; i++)
{
this.tinySubpagePools[i] = this.NewSubpagePoolHead(pageSize);
}
this.NumSmallSubpagePools = pageShifts - 9;
this.smallSubpagePools = this.NewSubpagePoolArray(this.NumSmallSubpagePools);
for (int i = 0; i < this.smallSubpagePools.Length; i++)
{
this.smallSubpagePools[i] = this.NewSubpagePoolHead(pageSize);
}
this.q100 = new PoolChunkList <T>(null, 100, int.MaxValue, chunkSize);
this.q075 = new PoolChunkList <T>(this.q100, 75, 100, chunkSize);
this.q050 = new PoolChunkList <T>(this.q075, 50, 100, chunkSize);
this.q025 = new PoolChunkList <T>(this.q050, 25, 75, chunkSize);
this.q000 = new PoolChunkList <T>(this.q025, 1, 50, chunkSize);
this.qInit = new PoolChunkList <T>(this.q000, int.MinValue, 25, chunkSize);
this.q100.PrevList(this.q075);
this.q075.PrevList(this.q050);
this.q050.PrevList(this.q025);
this.q025.PrevList(this.q000);
this.q000.PrevList(null);
this.qInit.PrevList(this.qInit);
var metrics = new List <IPoolChunkListMetric>(6);
metrics.Add(this.qInit);
metrics.Add(this.q000);
metrics.Add(this.q025);
metrics.Add(this.q050);
metrics.Add(this.q075);
metrics.Add(this.q100);
this.chunkListMetrics = metrics;
}
public PoolThreadLocalCache(PooledByteBufferAllocator owner)
{
this.owner = owner;
}
internal PooledByteBufferAllocatorMetric(PooledByteBufferAllocator allocator)
{
_allocator = allocator;
}
public DirectArena(PooledByteBufferAllocator parent, int pageSize, int maxOrder, int pageShifts, int chunkSize)
: base(parent, pageSize, maxOrder, pageShifts, chunkSize)
{
_memoryChunks = new List <MemoryChunk>();
}
public HeapArena(PooledByteBufferAllocator parent, int pageSize, int maxOrder, int pageShifts, int chunkSize)
: base(parent, pageSize, maxOrder, pageShifts, chunkSize)
{
}
async Task EnsureServerInitializedAsync()
{
if (this.ServerAddress != null)
{
return;
}
int threadCount = Environment.ProcessorCount;
var executorGroup = new MultithreadEventLoopGroup(threadCount);
var bufAllocator = new PooledByteBufferAllocator(16 * 1024, 10 * 1024 * 1024 / threadCount); // reserve 10 MB for 64 KB buffers
BlobSessionStatePersistenceProvider sessionStateProvider = await BlobSessionStatePersistenceProvider.CreateAsync(
this.settingsProvider.GetSetting("BlobSessionStatePersistenceProvider.StorageConnectionString"),
this.settingsProvider.GetSetting("BlobSessionStatePersistenceProvider.StorageContainerName"));
TableQos2StatePersistenceProvider qos2StateProvider = await TableQos2StatePersistenceProvider.CreateAsync(
this.settingsProvider.GetSetting("TableQos2StatePersistenceProvider.StorageConnectionString"),
this.settingsProvider.GetSetting("TableQos2StatePersistenceProvider.StorageTableName"));
var settings = new Settings(this.settingsProvider);
var authProvider = new SasTokenAuthenticationProvider();
var topicNameRouter = new TopicNameRouter();
DeviceClientFactoryFunc deviceClientFactoryFactory = IotHubDeviceClient.PreparePoolFactory(settings.IotHubConnectionString + ";DeviceId=stub", "a", 1);
ServerBootstrap server = new ServerBootstrap()
.Group(executorGroup)
.Channel<TcpServerSocketChannel>()
.ChildOption(ChannelOption.Allocator, bufAllocator)
.ChildOption(ChannelOption.AutoRead, false)
.ChildHandler(new ActionChannelInitializer<IChannel>(ch =>
{
ch.Pipeline.AddLast(TlsHandler.Server(this.tlsCertificate));
ch.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(true, 256 * 1024),
new MqttIotHubAdapter(
settings,
deviceClientFactoryFactory,
sessionStateProvider,
authProvider,
topicNameRouter,
qos2StateProvider),
new XUnitLoggingHandler(this.output));
}));
IChannel serverChannel = await server.BindAsync(IPAddress.Any, this.ProtocolGatewayPort);
this.ScheduleCleanup(async () =>
{
await serverChannel.CloseAsync();
await executorGroup.ShutdownGracefullyAsync();
});
this.ServerAddress = IPAddress.Loopback;
}
static PooledByteBufferAllocator()
{
int defaultPageSize = SystemPropertyUtil.GetInt("io.netty.allocator.pageSize", 8192);
Exception pageSizeFallbackCause = null;
try
{
ValidateAndCalculatePageShifts(defaultPageSize);
}
catch (Exception t)
{
pageSizeFallbackCause = t;
defaultPageSize = 8192;
}
DEFAULT_PAGE_SIZE = defaultPageSize;
int defaultMaxOrder = SystemPropertyUtil.GetInt("io.netty.allocator.maxOrder", 11);
Exception maxOrderFallbackCause = null;
try
{
ValidateAndCalculateChunkSize(DEFAULT_PAGE_SIZE, defaultMaxOrder);
}
catch (Exception t)
{
maxOrderFallbackCause = t;
defaultMaxOrder = 11;
}
DEFAULT_MAX_ORDER = defaultMaxOrder;
// Determine reasonable default for nHeapArena and nDirectArena.
// Assuming each arena has 3 chunks, the pool should not consume more than 50% of max memory.
// Use 2 * cores by default to reduce contention as we use 2 * cores for the number of EventLoops
// in NIO and EPOLL as well. If we choose a smaller number we will run into hotspots as allocation and
// deallocation needs to be synchronized on the PoolArena.
// See https://github.com/netty/netty/issues/3888
int defaultMinNumArena = Environment.ProcessorCount * 2;
int defaultChunkSize = DEFAULT_PAGE_SIZE << DEFAULT_MAX_ORDER;
DEFAULT_NUM_HEAP_ARENA = Math.Max(0, SystemPropertyUtil.GetInt("dotNetty.allocator.numHeapArenas", defaultMinNumArena));
// cache sizes
DEFAULT_TINY_CACHE_SIZE = SystemPropertyUtil.GetInt("io.netty.allocator.tinyCacheSize", 512);
DEFAULT_SMALL_CACHE_SIZE = SystemPropertyUtil.GetInt("io.netty.allocator.smallCacheSize", 256);
DEFAULT_NORMAL_CACHE_SIZE = SystemPropertyUtil.GetInt("io.netty.allocator.normalCacheSize", 64);
// 32 kb is the default maximum capacity of the cached buffer. Similar to what is explained in
// 'Scalable memory allocation using jemalloc'
DEFAULT_MAX_CACHED_BUFFER_CAPACITY = SystemPropertyUtil.GetInt("io.netty.allocator.maxCachedBufferCapacity", 32 * 1024);
// the number of threshold of allocations when cached entries will be freed up if not frequently used
DEFAULT_CACHE_TRIM_INTERVAL = SystemPropertyUtil.GetInt(
"io.netty.allocator.cacheTrimInterval", 8192);
if (Logger.DebugEnabled)
{
Logger.Debug("-Dio.netty.allocator.numHeapArenas: {}", DEFAULT_NUM_HEAP_ARENA);
if (pageSizeFallbackCause == null)
{
Logger.Debug("-Dio.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE);
}
else
{
Logger.Debug("-Dio.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE, pageSizeFallbackCause);
}
if (maxOrderFallbackCause == null)
{
Logger.Debug("-Dio.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER);
}
else
{
Logger.Debug("-Dio.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER, maxOrderFallbackCause);
}
Logger.Debug("-Dio.netty.allocator.chunkSize: {}", DEFAULT_PAGE_SIZE << DEFAULT_MAX_ORDER);
Logger.Debug("-Dio.netty.allocator.tinyCacheSize: {}", DEFAULT_TINY_CACHE_SIZE);
Logger.Debug("-Dio.netty.allocator.smallCacheSize: {}", DEFAULT_SMALL_CACHE_SIZE);
Logger.Debug("-Dio.netty.allocator.normalCacheSize: {}", DEFAULT_NORMAL_CACHE_SIZE);
Logger.Debug("-Dio.netty.allocator.maxCachedBufferCapacity: {}", DEFAULT_MAX_CACHED_BUFFER_CAPACITY);
Logger.Debug("-Dio.netty.allocator.cacheTrimInterval: {}", DEFAULT_CACHE_TRIM_INTERVAL);
}
Default = new PooledByteBufferAllocator();
}
