ai.rapids.cudf.nvcomp

Class BatchedLZ4Decompressor

java.lang.Object

ai.rapids.cudf.nvcomp.BatchedLZ4Decompressor

public class BatchedLZ4Decompressor
extends Object

LZ4 decompressor that operates on multiple input buffers in a batch

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BatchedLZ4Decompressor.BatchedMetadata Opaque metadata object for batched LZ4 decompression

Constructor Summary

Constructors

Constructor and Description
BatchedLZ4Decompressor()

Method Summary

Modifier and Type	Method and Description
static void	decompressAsync(BaseDeviceMemoryBuffer[] inputs, BaseDeviceMemoryBuffer tempBuffer, BatchedLZ4Decompressor.BatchedMetadata metadata, BaseDeviceMemoryBuffer[] outputs, Cuda.Stream stream) Asynchronously decompress a batch of buffers
static DeviceMemoryBuffer[]	decompressAsync(BaseDeviceMemoryBuffer[] inputs, Cuda.Stream stream) Asynchronously decompress a batch of buffers
static BatchedLZ4Decompressor.BatchedMetadata	getMetadata(BaseDeviceMemoryBuffer[] inputs, Cuda.Stream stream) Get the metadata associated with a batch of compressed buffers
static long[]	getOutputSizes(BatchedLZ4Decompressor.BatchedMetadata metadata, int numOutputs) Get the amount of ouptut storage required to decopmress a batch of buffers
static long	getTempSize(BatchedLZ4Decompressor.BatchedMetadata metadata) Get the amount of temporary storage required to decompress a batch of buffers

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BatchedLZ4Decompressor

public BatchedLZ4Decompressor()

Method Detail

getMetadata

public static BatchedLZ4Decompressor.BatchedMetadata getMetadata(BaseDeviceMemoryBuffer[] inputs,
                                                                 Cuda.Stream stream)

Get the metadata associated with a batch of compressed buffers

Parameters:

inputs - compressed buffers that will be decompressed

stream - CUDA stream to use

Returns:

opaque metadata object

getTempSize

public static long getTempSize(BatchedLZ4Decompressor.BatchedMetadata metadata)

Get the amount of temporary storage required to decompress a batch of buffers

Parameters:

metadata - metadata retrieved from the compressed buffers

Returns:

amount in bytes of temporary storage space required to decompress the buffer batch

getOutputSizes

public static long[] getOutputSizes(BatchedLZ4Decompressor.BatchedMetadata metadata,
                                    int numOutputs)

Get the amount of ouptut storage required to decopmress a batch of buffers

Parameters:

metadata - metadata retrieved from the compressed buffers

numOutputs - number of buffers in the batch

Returns:

amount in bytes of temporary storage space required to decompress the buffer batch

decompressAsync

public static void decompressAsync(BaseDeviceMemoryBuffer[] inputs,
                                   BaseDeviceMemoryBuffer tempBuffer,
                                   BatchedLZ4Decompressor.BatchedMetadata metadata,
                                   BaseDeviceMemoryBuffer[] outputs,
                                   Cuda.Stream stream)

Asynchronously decompress a batch of buffers

Parameters:

inputs - buffers to decompress

tempBuffer - temporary buffer

metadata - metadata retrieved from the compressed buffers

outputs - output buffers that will contain the compressed results

stream - CUDA stream to use

decompressAsync

public static DeviceMemoryBuffer[] decompressAsync(BaseDeviceMemoryBuffer[] inputs,
                                                   Cuda.Stream stream)

Asynchronously decompress a batch of buffers

Parameters:

inputs - buffers to decompress

stream - CUDA stream to use

Returns:

output buffers containing compressed data corresponding to the input buffers