Add experimental Project AST JIT for integral add and multiply [fast-ut] [databricks] #15312
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| /* | ||
| * Copyright (c) 2026, 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.Table | ||
| import ai.rapids.cudf.ast.CompiledExpression | ||
| import com.nvidia.spark.Retryable | ||
| import com.nvidia.spark.rapids.Arm.{closeOnExcept, withResource} | ||
| import com.nvidia.spark.rapids.GpuMetric.OP_TIME_LEGACY | ||
| import com.nvidia.spark.rapids.RapidsPluginImplicits._ | ||
| import com.nvidia.spark.rapids.ScalableTaskCompletion.onTaskCompletion | ||
| import com.nvidia.spark.rapids.shims.ShimUnaryExpression | ||
|
|
||
| import org.apache.spark.TaskContext | ||
| import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression} | ||
| import org.apache.spark.sql.types.DataType | ||
| import org.apache.spark.sql.vectorized.ColumnarBatch | ||
|
|
||
| object GpuAstJitExpression { | ||
| private def canUseAstJit(expression: GpuExpression): Boolean = | ||
| GpuBatchUtils.isFixedWidth(expression.dataType) && | ||
| expression.supportsAstJit && expression.containsAstJitOperator | ||
|
|
||
| private def asAstJit(child: GpuExpression): Option[GpuAstJitExpression] = child match { | ||
| case jitExpression: GpuAstJitExpression => Some(jitExpression) | ||
| case astExpression: GpuProjectAstExpression => asAstJit(astExpression.child) | ||
| case other if canUseAstJit(other) => Some(GpuAstJitExpression(other)) | ||
| case _ => None | ||
| } | ||
|
|
||
| private[rapids] def wrapTierExpression(expression: Expression): Expression = expression match { | ||
| case alias @ GpuAlias(child: GpuExpression, _) => | ||
| asAstJit(child).map(GpuProjectAstExpression.replaceChild(alias, _)).getOrElse(alias) | ||
| case other => other | ||
| } | ||
|
igorpeshansky marked this conversation as resolved.
|
||
|
|
||
| private[rapids] def wrapProjectExpressions( | ||
| expressions: List[NamedExpression]): List[NamedExpression] = { | ||
| expressions.map(wrapTierExpression(_).asInstanceOf[NamedExpression]) | ||
| } | ||
|
|
||
| /** Extracts a Project AST JIT wrapper after unwrapping any top-level aliases. */ | ||
| private[rapids] def extractTopLevel(expression: Expression): Option[GpuAstJitExpression] = | ||
| GpuProjectAstExpressionBase.extractTopLevel(expression).collect { | ||
| case jitExpression: GpuAstJitExpression => jitExpression | ||
| } | ||
|
|
||
| private def hasJitCandidate(expression: Expression): Boolean = expression.find { | ||
| case gpuExpression: GpuExpression => | ||
| gpuExpression.supportsAstJit && gpuExpression.containsAstJitOperator | ||
| case _ => false | ||
| }.isDefined | ||
|
|
||
| private def finalBackend(expression: Expression): String = { | ||
| GpuProjectAstExpressionBase.extractTopLevel(expression) match { | ||
| case Some(_: GpuAstJitExpression) => "Project AST JIT" | ||
| case Some(_: GpuProjectAstExpression) => "legacy Project AST" | ||
|
Collaborator
There was a problem hiding this comment. nit: I don't think this explains it very well, and I am not sure a customer is going to understand. If this is not for a customer to follow, then can we make sure it is documented and drop the Project from it? Something like "AST JIT" and "AST Interpreted" feel better to me. |
||
| case _ => "the regular GPU projection" | ||
| } | ||
| } | ||
|
|
||
| private[rapids] def explainFinalSelections( | ||
| expressionTiers: Seq[Seq[Expression]], | ||
| all: Boolean): String = { | ||
| expressionTiers.zipWithIndex.flatMap { case (expressions, tier) => | ||
| val explanations = expressions.iterator.collect { | ||
| case expression if all || | ||
| (extractTopLevel(expression).isEmpty && hasJitCandidate(expression)) => | ||
| s" $expression final backend: ${finalBackend(expression)}\n" | ||
| }.mkString | ||
| if (explanations.nonEmpty) { | ||
| Some(s" TIER $tier\n$explanations") | ||
| } else { | ||
| None | ||
| } | ||
| }.mkString | ||
| } | ||
| } | ||
|
|
||
| case class GpuAstJitExpression(child: GpuExpression) | ||
|
igorpeshansky marked this conversation as resolved.
igorpeshansky marked this conversation as resolved.
|
||
| extends ShimUnaryExpression with GpuProjectAstExpressionBase | ||
| with GpuMetricsInjectable with Retryable with AutoCloseable { | ||
|
|
||
| @transient private[this] var compiledExpression: CompiledExpression = _ | ||
| private[this] var opTime: GpuMetric = NoopMetric | ||
|
|
||
| override def dataType: DataType = child.dataType | ||
|
|
||
| override def nullable: Boolean = child.nullable | ||
|
|
||
| override def toString: String = s"AST_JIT($child)" | ||
|
|
||
| override def injectMetrics(metrics: Map[String, GpuMetric]): Unit = { | ||
| // OP_TIME_LEGACY is the owning operator's non-RDD timing metric, not a legacy AST metric. | ||
| opTime = metrics.getOrElse(OP_TIME_LEGACY, NoopMetric) | ||
| } | ||
|
|
||
| override def checkpoint(): Unit = { | ||
| getCompiledExpression | ||
| } | ||
|
|
||
| // Compiled ASTs are immutable and remain valid across retry attempts. | ||
| override def restore(): Unit = () | ||
|
|
||
| override def close(): Unit = { | ||
| val toClose = synchronized { | ||
| val current = compiledExpression | ||
| compiledExpression = null | ||
| current | ||
| } | ||
| Option(toClose).foreach(_.safeClose()) | ||
| } | ||
|
|
||
| override def columnarEval(batch: ColumnarBatch): GpuColumnVector = { | ||
| withResource(GpuProjectAstExpression.tableFromBatch(batch)) { table => | ||
| computeColumn(table) | ||
| } | ||
| } | ||
|
|
||
| private[rapids] override def computeColumn(table: Table): GpuColumnVector = { | ||
| val compiled = getCompiledExpression | ||
| NvtxIdWithMetrics(NvtxRegistry.PROJECT_AST_JIT, opTime) { | ||
| closeOnExcept(compiled.computeColumnJit(table)) { result => | ||
| GpuColumnVector.from(result, dataType) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private def getCompiledExpression: CompiledExpression = synchronized { | ||
| if (compiledExpression == null) { | ||
| val compiled = NvtxIdWithMetrics(NvtxRegistry.COMPILE_AST_JIT, opTime) { | ||
| // Force every bound reference to the left table; Project AST has one input table. | ||
| child.convertToAst(Int.MaxValue).compile() | ||
| } | ||
| closeOnExcept(compiled) { _ => | ||
| var completed = false | ||
| Option(TaskContext.get()).foreach { taskContext => | ||
| onTaskCompletion(taskContext) { | ||
| completed = true | ||
| close() | ||
| } | ||
| } | ||
| if (completed) { | ||
| throw new IllegalStateException( | ||
| "Task completed while registering the AST JIT cleanup callback") | ||
| } | ||
| compiledExpression = compiled | ||
| } | ||
| } | ||
| compiledExpression | ||
| } | ||
| } | ||
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Uh oh!
There was an error while loading. Please reload this page.