SizeClassChunkManagementStrategy Class — netty Architecture

Source Code

buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java lines 662–684

    private static final class SizeClassChunkManagementStrategy implements ChunkManagementStrategy {
        // To amortize activation/deactivation of chunks, we should have a minimum number of segments per chunk.
        // We choose 32 because it seems neither too small nor too big.
        // For segments of 16 KiB, the chunks will be half a megabyte.
        private static final int MIN_SEGMENTS_PER_CHUNK = 32;
        private final int segmentSize;
        private final int chunkSize;

        private SizeClassChunkManagementStrategy(int segmentSize) {
            this.segmentSize = ObjectUtil.checkPositive(segmentSize, "segmentSize");
            chunkSize = Math.max(MIN_CHUNK_SIZE, segmentSize * MIN_SEGMENTS_PER_CHUNK);
        }

        @Override
        public ChunkController createController(MagazineGroup group) {
            return new SizeClassChunkController(group, segmentSize, chunkSize);
        }

        @Override
        public ChunkCache createChunkCache(boolean isThreadLocal) {
            return new ConcurrentQueueChunkCache();
        }
    }