Package org.apache.sysds.runtime.controlprogram.parfor.opt

Class OptimizationWrapper

java.lang.Object

org.apache.sysds.runtime.controlprogram.parfor.opt.OptimizationWrapper

public class OptimizationWrapper
extends Object

Wrapper to ParFOR cost estimation and optimizer. This is intended to be the only public access to the optimizer package. NOTE: There are two main alternatives for invocation of this OptimizationWrapper: (1) During compilation (after creating rtprog), (2) on execute of all top-level ParFOR PBs. We decided to use (2) (and carry the SBs during execution) due to the following advantages - Known Statistics: problem size of top-level parfor known, in general, less unknown statistics - No Overhead: preventing overhead for non-parfor scripts (finding top-level parfors) - Simplicity: no need of finding top-level parfors

Field Summary

Fields

Modifier and Type	Field	Description
static final double	PAR_FACTOR_INFRASTRUCTURE

Constructor Summary

Constructors

Constructor	Description
OptimizationWrapper()

Method Summary

Modifier and Type	Method	Description
static void	optimize(ParForProgramBlock.POptMode type, ParForStatementBlock sb, ParForProgramBlock pb, ExecutionContext ec, int numRuns)	Called once per top-level parfor (during runtime, on parfor execute) in order to optimize the specific parfor program block.

Methods inherited from class java.lang.Object

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

Field Details

PAR_FACTOR_INFRASTRUCTURE

public static final double PAR_FACTOR_INFRASTRUCTURE

See Also:

• Constant Field Values

Constructor Details

OptimizationWrapper

public OptimizationWrapper()

Method Details

optimize

public static void optimize(ParForProgramBlock.POptMode type,
 ParForStatementBlock sb,
 ParForProgramBlock pb,
 ExecutionContext ec,
 int numRuns)

Called once per top-level parfor (during runtime, on parfor execute) in order to optimize the specific parfor program block. NOTE: this is the default way to invoke parfor optimizers.

Parameters:

type - ?

sb - parfor statement block

pb - parfor program block

ec - execution context

numRuns - number of optimizations performed so far