Package org.apache.sysds.hops.codegen.opt

Class PlanSelectionFuseNoRedundancy

java.lang.Object

org.apache.sysds.hops.codegen.opt.PlanSelection

org.apache.sysds.hops.codegen.opt.PlanSelectionFuseNoRedundancy

public class PlanSelectionFuseNoRedundancy
extends PlanSelection

This plan selection heuristic aims for fusion without any redundant computation, which, however, potentially leads to more materialized intermediates than the fuse all heuristic.

NOTE: This heuristic is essentially the same as FuseAll, except that any plans that refer to a hop with multiple consumers are removed in a pre-processing step.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.sysds.hops.codegen.opt.PlanSelection

PlanSelection.VisitMarkCost

Constructor Summary

Constructors

Constructor	Description
PlanSelectionFuseNoRedundancy()

Method Summary

Modifier and Type	Method	Description
void	selectPlans(CPlanMemoTable memo, ArrayList<Hop> roots)	Given a HOP DAG G, and a set of partial fusions plans P, find the set of optimal, non-conflicting fusion plans P' that applied to G minimizes costs C with P' = \argmin_{p \subseteq P} C(G, p) s.t.

Methods inherited from class java.lang.Object

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

Constructor Details

PlanSelectionFuseNoRedundancy

public PlanSelectionFuseNoRedundancy()

Method Details

selectPlans

public void selectPlans(CPlanMemoTable memo,
 ArrayList<Hop> roots)

Description copied from class: PlanSelection

Given a HOP DAG G, and a set of partial fusions plans P, find the set of optimal, non-conflicting fusion plans P' that applied to G minimizes costs C with P' = \argmin_{p \subseteq P} C(G, p) s.t. Z \vDash p, where Z is a set of constraints such as memory budgets and block size restrictions per fused operator.

Specified by:

selectPlans in class PlanSelection

Parameters:

memo - partial fusion plans P

roots - entry points of HOP DAG G