internal void Free(object buffer) { #if ENABLE // Check to see whether or not the cache is disabled. if (m_CacheName == null) { return; } #endif if (PinnableBufferCacheEventSource.Log.IsEnabled()) { PinnableBufferCacheEventSource.Log.FreeBuffer(m_CacheName, PinnableBufferCacheEventSource.AddressOf(buffer), buffer.GetHashCode(), m_FreeList.Count); } // After we've done 3 gen1 GCs, assume that all buffers have aged into gen2 on the free path. if ((m_gen1CountAtLastRestock + 3) > GC.CollectionCount(GC.MaxGeneration - 1)) { lock (this) { if (GC.GetGeneration(buffer) < GC.MaxGeneration) { // The buffer is not aged, so put it in the non-aged free list. m_moreThanFreeListNeeded = true; PinnableBufferCacheEventSource.Log.FreeBufferStillTooYoung(m_CacheName, m_NotGen2.Count); m_NotGen2.Add(buffer); m_gen1CountAtLastRestock = GC.CollectionCount(GC.MaxGeneration - 1); return; } } } // If we discovered that it is indeed Gen2, great, put it in the Gen2 list. m_FreeList.Push(buffer); }
internal object Allocate() { #if ENABLE // Check to see whether or not the cache is disabled. if (m_CacheName == null) { return(m_factory()); } #endif // Fast path, get it from our Gen2 aged m_FreeList. object returnBuffer; if (!m_FreeList.TryPop(out returnBuffer)) { Restock(out returnBuffer); } // Computing free count is expensive enough that we don't want to compute it unless logging is on. if (PinnableBufferCacheEventSource.Log.IsEnabled()) { int numAllocCalls = Interlocked.Increment(ref m_numAllocCalls); if (numAllocCalls >= 1024) { lock (this) { int previousNumAllocCalls = Interlocked.Exchange(ref m_numAllocCalls, 0); if (previousNumAllocCalls >= 1024) { int nonGen2Count = 0; foreach (object o in m_FreeList) { if (GC.GetGeneration(o) < GC.MaxGeneration) { nonGen2Count++; } } PinnableBufferCacheEventSource.Log.WalkFreeListResult(m_CacheName, m_FreeList.Count, nonGen2Count); } } } PinnableBufferCacheEventSource.Log.AllocateBuffer(m_CacheName, PinnableBufferCacheEventSource.AddressOf(returnBuffer), returnBuffer.GetHashCode(), GC.GetGeneration(returnBuffer), m_FreeList.Count); } return(returnBuffer); }