com.nvidia.spark.rapids.SpillableColumnarBatch.scala Maven / Gradle / Ivy
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Creates the distribution package of the RAPIDS plugin for Apache Spark
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/*
* Copyright (c) 2020-2024, NVIDIA CORPORATION.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.nvidia.spark.rapids
import ai.rapids.cudf.{ContiguousTable, DeviceMemoryBuffer, HostMemoryBuffer}
import com.nvidia.spark.rapids.Arm.{closeOnExcept, withResource}
import org.apache.spark.TaskContext
import org.apache.spark.sql.types.DataType
import org.apache.spark.sql.vectorized.ColumnarBatch
/**
* Holds a ColumnarBatch that the backing buffers on it can be spilled.
*/
trait SpillableColumnarBatch extends AutoCloseable {
/**
* The number of rows stored in this batch.
*/
def numRows(): Int
/**
* Set a new spill priority.
*/
def setSpillPriority(priority: Long): Unit
/**
* Increment the reference count for this batch (if applicable) and
* return this for easy chaining.
*/
def incRefCount(): SpillableColumnarBatch
/**
* Get the columnar batch.
* @note It is the responsibility of the caller to close the batch.
* @note If the buffer is compressed data then the resulting batch will be built using
* `GpuCompressedColumnVector`, and it is the responsibility of the caller to deal
* with decompressing the data if necessary.
*/
def getColumnarBatch(): ColumnarBatch
def sizeInBytes: Long
def dataTypes: Array[DataType]
}
/**
* Cudf does not support a table with columns and no rows. This takes care of making one of those
* spillable, even though in reality there is no backing buffer. It does this by just keeping the
* row count in memory, and not dealing with the catalog at all.
*/
class JustRowsColumnarBatch(numRows: Int)
extends SpillableColumnarBatch {
override def numRows(): Int = numRows
override def setSpillPriority(priority: Long): Unit = () // NOOP nothing to spill
def getColumnarBatch(): ColumnarBatch = {
GpuSemaphore.acquireIfNecessary(TaskContext.get())
new ColumnarBatch(Array.empty, numRows)
}
override def close(): Unit = () // NOOP nothing to close
override val sizeInBytes: Long = 0L
override def dataTypes: Array[DataType] = Array.empty
// There is no off heap data and close is a noop so just return this
override def incRefCount(): SpillableColumnarBatch = this
}
/**
* The implementation of [[SpillableColumnarBatch]] that points to buffers that can be spilled.
* @note the buffer should be in the cache by the time this is created and this is taking over
* ownership of the life cycle of the batch. So don't call this constructor directly please
* use `SpillableColumnarBatch.apply` instead.
*/
class SpillableColumnarBatchImpl (
handle: RapidsBufferHandle,
rowCount: Int,
sparkTypes: Array[DataType])
extends SpillableColumnarBatch {
private var refCount = 1
override def dataTypes: Array[DataType] = sparkTypes
/**
* The number of rows stored in this batch.
*/
override def numRows(): Int = rowCount
private def withRapidsBuffer[T](fn: RapidsBuffer => T): T = {
withResource(RapidsBufferCatalog.acquireBuffer(handle)) { rapidsBuffer =>
fn(rapidsBuffer)
}
}
override lazy val sizeInBytes: Long =
withRapidsBuffer(_.memoryUsedBytes)
/**
* Set a new spill priority.
*/
override def setSpillPriority(priority: Long): Unit = {
handle.setSpillPriority(priority)
}
override def getColumnarBatch(): ColumnarBatch = {
withRapidsBuffer { rapidsBuffer =>
GpuSemaphore.acquireIfNecessary(TaskContext.get())
rapidsBuffer.getColumnarBatch(sparkTypes)
}
}
override def incRefCount(): SpillableColumnarBatch = {
if (refCount <= 0) {
throw new IllegalStateException("Use after free on SpillableColumnarBatchImpl")
}
refCount += 1
this
}
/**
* Remove the `ColumnarBatch` from the cache.
*/
override def close(): Unit = {
refCount -= 1
if (refCount == 0) {
// closing my reference
handle.close()
}
// TODO this is causing problems so we need to look into this
// https://github.com/NVIDIA/spark-rapids/issues/10161
// else if (refCount < 0) {
// throw new IllegalStateException("Double free on SpillableColumnarBatchImpl")
// }
}
override def toString: String =
s"SCB $handle $rowCount ${sparkTypes.toList} $refCount"
}
class JustRowsHostColumnarBatch(numRows: Int)
extends SpillableColumnarBatch {
override def numRows(): Int = numRows
override def setSpillPriority(priority: Long): Unit = () // NOOP nothing to spill
def getColumnarBatch(): ColumnarBatch = {
new ColumnarBatch(Array.empty, numRows)
}
override def close(): Unit = () // NOOP nothing to close
override val sizeInBytes: Long = 0L
override def dataTypes: Array[DataType] = Array.empty
// There is no off heap data and close is a noop so just return this
override def incRefCount(): SpillableColumnarBatch = this
}
/**
* The implementation of [[SpillableHostColumnarBatch]] that points to buffers that can be spilled.
* @note the buffer should be in the cache by the time this is created and this is taking over
* ownership of the life cycle of the batch. So don't call this constructor directly please
* use `SpillableHostColumnarBatch.apply` instead.
*/
class SpillableHostColumnarBatchImpl (
handle: RapidsBufferHandle,
rowCount: Int,
sparkTypes: Array[DataType],
catalog: RapidsBufferCatalog)
extends SpillableColumnarBatch {
private var refCount = 1
override def dataTypes: Array[DataType] = sparkTypes
/**
* The number of rows stored in this batch.
*/
override def numRows(): Int = rowCount
private def withRapidsHostBatchBuffer[T](fn: RapidsHostBatchBuffer => T): T = {
withResource(catalog.acquireHostBatchBuffer(handle)) { rapidsBuffer =>
fn(rapidsBuffer)
}
}
override lazy val sizeInBytes: Long = {
withRapidsHostBatchBuffer(_.memoryUsedBytes)
}
/**
* Set a new spill priority.
*/
override def setSpillPriority(priority: Long): Unit = {
handle.setSpillPriority(priority)
}
override def getColumnarBatch(): ColumnarBatch = {
withRapidsHostBatchBuffer { hostBatchBuffer =>
hostBatchBuffer.getHostColumnarBatch(sparkTypes)
}
}
override def incRefCount(): SpillableColumnarBatch = {
if (refCount <= 0) {
throw new IllegalStateException("Use after free on SpillableHostColumnarBatchImpl")
}
refCount += 1
this
}
/**
* Remove the `ColumnarBatch` from the cache.
*/
override def close(): Unit = {
refCount -= 1
if (refCount == 0) {
// closing my reference
handle.close()
} else if (refCount < 0) {
throw new IllegalStateException("Double free on SpillableHostColumnarBatchImpl")
}
}
}
object SpillableColumnarBatch {
/**
* Create a new SpillableColumnarBatch.
*
* @note This takes over ownership of batch, and batch should not be used after this.
* @param batch the batch to make spillable
* @param priority the initial spill priority of this batch
*/
def apply(batch: ColumnarBatch,
priority: Long): SpillableColumnarBatch = {
val numRows = batch.numRows()
if (batch.numCols() <= 0) {
// We consumed it
batch.close()
new JustRowsColumnarBatch(numRows)
} else {
val types = GpuColumnVector.extractTypes(batch)
val handle = addBatch(batch, priority)
new SpillableColumnarBatchImpl(
handle,
numRows,
types)
}
}
/**
* Create a new SpillableColumnarBatch
* @note This takes over ownership of `ct`, and `ct` should not be used after this.
* @param ct contiguous table containing the batch GPU data
* @param sparkTypes array of Spark types describing the data schema
* @param priority the initial spill priority of this batch
*/
def apply(
ct: ContiguousTable,
sparkTypes: Array[DataType],
priority: Long): SpillableColumnarBatch = {
withResource(ct) { _ =>
val handle = RapidsBufferCatalog.addContiguousTable(ct, priority)
new SpillableColumnarBatchImpl(handle, ct.getRowCount.toInt, sparkTypes)
}
}
private[this] def allFromSameBuffer(batch: ColumnarBatch): Boolean = {
var bufferAddr = 0L
var isSet = false
val numColumns = batch.numCols()
(0 until numColumns).forall { i =>
batch.column(i) match {
case fb: GpuColumnVectorFromBuffer =>
if (!isSet) {
bufferAddr = fb.getBuffer.getAddress
isSet = true
true
} else {
bufferAddr == fb.getBuffer.getAddress
}
case _ => false
}
}
}
private[this] def addBatch(
batch: ColumnarBatch,
initialSpillPriority: Long): RapidsBufferHandle = {
withResource(batch) { batch =>
val numColumns = batch.numCols()
if (GpuCompressedColumnVector.isBatchCompressed(batch)) {
val cv = batch.column(0).asInstanceOf[GpuCompressedColumnVector]
val buff = cv.getTableBuffer
RapidsBufferCatalog.addBuffer(buff, cv.getTableMeta, initialSpillPriority)
} else if (GpuPackedTableColumn.isBatchPacked(batch)) {
val cv = batch.column(0).asInstanceOf[GpuPackedTableColumn]
RapidsBufferCatalog.addContiguousTable(
cv.getContiguousTable,
initialSpillPriority)
} else if (numColumns > 0 &&
allFromSameBuffer(batch)) {
val cv = batch.column(0).asInstanceOf[GpuColumnVectorFromBuffer]
val buff = cv.getBuffer
RapidsBufferCatalog.addBuffer(buff, cv.getTableMeta, initialSpillPriority)
} else {
RapidsBufferCatalog.addBatch(batch, initialSpillPriority)
}
}
}
}
object SpillableHostColumnarBatch {
/**
* Create a new SpillableColumnarBatch backed by host columns.
*
* @note This takes over ownership of batch, and batch should not be used after this.
* @param batch the batch to make spillable
* @param priority the initial spill priority of this batch
*/
def apply(
batch: ColumnarBatch,
priority: Long,
catalog: RapidsBufferCatalog = RapidsBufferCatalog.singleton): SpillableColumnarBatch = {
val numRows = batch.numRows()
if (batch.numCols() <= 0) {
// We consumed it
batch.close()
new JustRowsHostColumnarBatch(numRows)
} else {
val types = RapidsHostColumnVector.extractColumns(batch).map(_.dataType())
val handle = addHostBatch(batch, priority, catalog)
new SpillableHostColumnarBatchImpl(
handle,
numRows,
types,
catalog)
}
}
private[this] def addHostBatch(
batch: ColumnarBatch,
initialSpillPriority: Long,
catalog: RapidsBufferCatalog): RapidsBufferHandle = {
withResource(batch) { batch =>
catalog.addBatch(batch, initialSpillPriority)
}
}
}
/**
* Just like a SpillableColumnarBatch but for buffers.
*/
class SpillableBuffer(
handle: RapidsBufferHandle) extends AutoCloseable {
/**
* Set a new spill priority.
*/
def setSpillPriority(priority: Long): Unit = {
handle.setSpillPriority(priority)
}
/**
* Use the device buffer.
*/
def getDeviceBuffer(): DeviceMemoryBuffer = {
withResource(RapidsBufferCatalog.acquireBuffer(handle)) { rapidsBuffer =>
rapidsBuffer.getDeviceMemoryBuffer
}
}
/**
* Remove the buffer from the cache.
*/
override def close(): Unit = {
handle.close()
}
}
/**
* This represents a spillable `HostMemoryBuffer` and adds an interface to access
* this host buffer at the host layer, unlike `SpillableBuffer` (device)
* @param handle an object used to refer to this buffer in the spill framework
* @param length a metadata-only length that is kept in the `SpillableHostBuffer`
* instance. Used in cases where the backing host buffer is larger
* than the number of usable bytes.
* @param catalog this was added for tests, it defaults to
* `RapidsBufferCatalog.singleton` in the companion object.
*/
class SpillableHostBuffer(handle: RapidsBufferHandle,
val length: Long,
catalog: RapidsBufferCatalog) extends AutoCloseable {
/**
* Set a new spill priority.
*/
def setSpillPriority(priority: Long): Unit = {
handle.setSpillPriority(priority)
}
/**
* Remove the buffer from the cache.
*/
override def close(): Unit = {
handle.close()
}
def getHostBuffer(): HostMemoryBuffer = {
withResource(catalog.acquireBuffer(handle)) { rapidsBuffer =>
rapidsBuffer.getHostMemoryBuffer
}
}
}
object SpillableBuffer {
/**
* Create a new SpillableBuffer.
* @note This takes over ownership of buffer, and buffer should not be used after this.
* @param buffer the buffer to make spillable
* @param priority the initial spill priority of this buffer
*/
def apply(
buffer: DeviceMemoryBuffer,
priority: Long): SpillableBuffer = {
val meta = MetaUtils.getTableMetaNoTable(buffer.getLength)
val handle = withResource(buffer) { _ =>
RapidsBufferCatalog.addBuffer(buffer, meta, priority)
}
new SpillableBuffer(handle)
}
}
object SpillableHostBuffer {
/**
* Create a new SpillableBuffer.
* @note This takes over ownership of buffer, and buffer should not be used after this.
* @param length the actual length of the data within the host buffer, which
* must be <= than buffer.getLength, otherwise this function throws
* and closes `buffer`
* @param buffer the buffer to make spillable
* @param priority the initial spill priority of this buffer
*/
def apply(buffer: HostMemoryBuffer,
length: Long,
priority: Long,
catalog: RapidsBufferCatalog = RapidsBufferCatalog.singleton): SpillableHostBuffer = {
closeOnExcept(buffer) { _ =>
require(length <= buffer.getLength,
s"Attempted to add a host spillable with a length ${length} B which is " +
s"greater than the backing host buffer length ${buffer.getLength} B")
}
val meta = MetaUtils.getTableMetaNoTable(buffer.getLength)
val handle = withResource(buffer) { _ =>
catalog.addBuffer(buffer, meta, priority)
}
new SpillableHostBuffer(handle, length, catalog)
}
}
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