@Override
public void processInstruction(ExecutionContext ec)
throws DMLRuntimeException, DMLUnsupportedOperationException {
SparkExecutionContext sec = (SparkExecutionContext) ec;
String rddVar = (_type == CacheType.LEFT) ? input2.getName() : input1.getName();
String bcastVar = (_type == CacheType.LEFT) ? input1.getName() : input2.getName();
MatrixCharacteristics mc = sec.getMatrixCharacteristics(output.getName());
long rlen =
sec.getScalarInput(_nrow.getName(), _nrow.getValueType(), _nrow.isLiteral()).getLongValue();
// get inputs
JavaPairRDD<MatrixIndexes, MatrixBlock> in1 = sec.getBinaryBlockRDDHandleForVariable(rddVar);
PartitionedBroadcastMatrix in2 = sec.getBroadcastForVariable(bcastVar);
// execute pmm instruction
JavaPairRDD<MatrixIndexes, MatrixBlock> out =
in1.flatMapToPair(new RDDPMMFunction(_type, in2, rlen, mc.getRowsPerBlock()));
out = RDDAggregateUtils.sumByKeyStable(out);
// put output RDD handle into symbol table
sec.setRDDHandleForVariable(output.getName(), out);
sec.addLineageRDD(output.getName(), rddVar);
sec.addLineageBroadcast(output.getName(), bcastVar);
// update output statistics if not inferred
updateBinaryMMOutputMatrixCharacteristics(sec, false);
}
/**
* @param pfid
* @param program
* @param taskFile
* @param resultFile
* @param enableCPCaching
* @param mode
* @param numMappers
* @param replication
* @return
* @throws DMLRuntimeException
* @throws DMLUnsupportedOperationException
*/
public static RemoteParForJobReturn runJob(
long pfid,
String itervar,
String matrixvar,
String program,
String resultFile,
MatrixObject input,
ExecutionContext ec,
PDataPartitionFormat dpf,
OutputInfo oi,
boolean tSparseCol, // config params
boolean enableCPCaching,
int numReducers) // opt params
throws DMLRuntimeException, DMLUnsupportedOperationException {
String jobname = "ParFor-DPESP";
long t0 = DMLScript.STATISTICS ? System.nanoTime() : 0;
SparkExecutionContext sec = (SparkExecutionContext) ec;
JavaSparkContext sc = sec.getSparkContext();
// prepare input parameters
MatrixDimensionsMetaData md = (MatrixDimensionsMetaData) input.getMetaData();
MatrixCharacteristics mc = md.getMatrixCharacteristics();
InputInfo ii = InputInfo.BinaryBlockInputInfo;
// initialize accumulators for tasks/iterations
Accumulator<Integer> aTasks = sc.accumulator(0);
Accumulator<Integer> aIters = sc.accumulator(0);
JavaPairRDD<MatrixIndexes, MatrixBlock> in = sec.getBinaryBlockRDDHandleForVariable(matrixvar);
DataPartitionerRemoteSparkMapper dpfun = new DataPartitionerRemoteSparkMapper(mc, ii, oi, dpf);
RemoteDPParForSparkWorker efun =
new RemoteDPParForSparkWorker(
program, matrixvar, itervar, enableCPCaching, mc, tSparseCol, dpf, oi, aTasks, aIters);
List<Tuple2<Long, String>> out =
in.flatMapToPair(dpfun) // partition the input blocks
.groupByKey(numReducers) // group partition blocks
.mapPartitionsToPair(efun) // execute parfor tasks, incl cleanup
.collect(); // get output handles
// de-serialize results
LocalVariableMap[] results = RemoteParForUtils.getResults(out, LOG);
int numTasks = aTasks.value(); // get accumulator value
int numIters = aIters.value(); // get accumulator value
// create output symbol table entries
RemoteParForJobReturn ret = new RemoteParForJobReturn(true, numTasks, numIters, results);
// maintain statistics
Statistics.incrementNoOfCompiledSPInst();
Statistics.incrementNoOfExecutedSPInst();
if (DMLScript.STATISTICS) {
Statistics.maintainCPHeavyHitters(jobname, System.nanoTime() - t0);
}
return ret;
}
@Override
public void processInstruction(ExecutionContext ec)
throws DMLRuntimeException, DMLUnsupportedOperationException {
SparkExecutionContext sec = (SparkExecutionContext) ec;
String rddVar = (_type == CacheType.LEFT) ? input2.getName() : input1.getName();
String bcastVar = (_type == CacheType.LEFT) ? input1.getName() : input2.getName();
MatrixCharacteristics mcRdd = sec.getMatrixCharacteristics(rddVar);
MatrixCharacteristics mcBc = sec.getMatrixCharacteristics(bcastVar);
// get inputs
JavaPairRDD<MatrixIndexes, MatrixBlock> in1 = sec.getBinaryBlockRDDHandleForVariable(rddVar);
PartitionedBroadcastMatrix in2 = sec.getBroadcastForVariable(bcastVar);
// empty input block filter
if (!_outputEmpty) in1 = in1.filter(new FilterNonEmptyBlocksFunction());
// execute mapmult instruction
JavaPairRDD<MatrixIndexes, MatrixBlock> out = null;
if (requiresFlatMapFunction(_type, mcBc))
out = in1.flatMapToPair(new RDDFlatMapMMFunction(_type, in2));
else if (preservesPartitioning(mcRdd, _type))
out = in1.mapPartitionsToPair(new RDDMapMMPartitionFunction(_type, in2), true);
else out = in1.mapToPair(new RDDMapMMFunction(_type, in2));
// empty output block filter
if (!_outputEmpty) out = out.filter(new FilterNonEmptyBlocksFunction());
// perform aggregation if necessary and put output into symbol table
if (_aggtype == SparkAggType.SINGLE_BLOCK) {
MatrixBlock out2 = RDDAggregateUtils.sumStable(out);
// put output block into symbol table (no lineage because single block)
// this also includes implicit maintenance of matrix characteristics
sec.setMatrixOutput(output.getName(), out2);
} else // MULTI_BLOCK or NONE
{
if (_aggtype == SparkAggType.MULTI_BLOCK) out = RDDAggregateUtils.sumByKeyStable(out);
// put output RDD handle into symbol table
sec.setRDDHandleForVariable(output.getName(), out);
sec.addLineageRDD(output.getName(), rddVar);
sec.addLineageBroadcast(output.getName(), bcastVar);
// update output statistics if not inferred
updateBinaryMMOutputMatrixCharacteristics(sec, true);
}
}
