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Add an ignored PageRank test for a local Twitter2010 edge list #2627

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Add an ignored PageRank test for a local Twitter2010 edge list #2627

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132 changes: 132 additions & 0 deletions src/test/java/org/apache/sysds/test/applications/PageRankTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,11 +19,21 @@

package org.apache.sysds.test.applications;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
Expand Down Expand Up @@ -112,5 +122,127 @@ public void testPageRank() {

compareResults(0.0000001);
}
/*
* Twitter2010 edge list is local and not part of this repository.
*/
@Test
@Ignore
public void testPageRankTwitter2010() throws IOException {
// run once; this class is parameterized over several sizes
if (numRows != 50 || numCols != 50) {
return;
}

int maxiter = 2;
double alpha = 0.85;
int maxNodes = Integer.getInteger("sysds.test.twitter2010.maxNodes", 500);
int maxLines = Integer.getInteger("sysds.test.twitter2010.maxLines", 2000000);

getAndLoadTestConfiguration(TEST_NAME);

List<String> proArgs = new ArrayList<>();
proArgs.add("-args");
proArgs.add(input("g"));
proArgs.add(input("p"));
proArgs.add(input("e"));
proArgs.add(input("u"));
proArgs.add(Double.toString(alpha));
proArgs.add(Integer.toString(maxiter));
proArgs.add(output("p"));
programArgs = proArgs.toArray(new String[proArgs.size()]);

fullDMLScriptName = getScript();

double[][] g = readTwitter2010LinkMatrix(twitter2010EdgeList(), maxNodes, maxLines);
int rows = g.length;
double[][] p = getRandomMatrix(rows, 1, 1, 1, 1, -1);
double[][] e = getRandomMatrix(rows, 1, 1, 1, 1, -1);
double[][] u = getRandomMatrix(1, rows, 1, 1, 1, -1);
writeInputMatrixWithMTD("g", g, true);
writeInputMatrixWithMTD("p", p, true);
writeInputMatrixWithMTD("e", e, true);
writeInputMatrixWithMTD("u", u, true);

for (int i = 0; i < maxiter; i++) {
double[][] gp = TestUtils.performMatrixMultiplication(g, p);
double[][] eu = TestUtils.performMatrixMultiplication(e, u);
double[][] eup = TestUtils.performMatrixMultiplication(eu, p);
for (int j = 0; j < rows; j++) {
p[j][0] = alpha * gp[j][0] + (1 - alpha) * eup[j][0];
}
}

writeExpectedMatrix("p", p);

/*
* No Spark job limit for the local edge list.
*/
int expectedNumberOfJobs = -1;
runTest(true, EXCEPTION_NOT_EXPECTED, null, expectedNumberOfJobs);

compareResults(0.0000001);
}

private static File twitter2010EdgeList() {
String configured = System.getProperty("sysds.test.twitter2010");
if (configured == null || configured.isEmpty())
configured = System.getenv("TWITTER2010_EDGES");
Assert.assertTrue(
"Set -Dsysds.test.twitter2010 or TWITTER2010_EDGES to a local Twitter2010 edge list.",
configured != null && !configured.isEmpty());
File edgeList = new File(configured);
Assert.assertTrue("Twitter2010 edge list not found: " + edgeList.getAbsolutePath(), edgeList.isFile());
return edgeList;
}

// src -> dst stored as 1/outdegree in column src
private static double[][] readTwitter2010LinkMatrix(File edgeList, int maxNodes, int maxLines) throws IOException {
Map<Long, Integer> ids = new HashMap<>();
List<int[]> edges = new ArrayList<>();
Set<Long> seen = new HashSet<>();
int lines = 0;
try (BufferedReader reader = new BufferedReader(new FileReader(edgeList))) {
String line;
while ((line = reader.readLine()) != null && lines < maxLines) {
line = line.trim();
if (line.isEmpty() || line.charAt(0) == '#')
continue;
lines++;
String[] parts = line.split("\\s+");
if (parts.length < 2)
continue;
int src = internNode(ids, Long.parseLong(parts[0]), maxNodes);
int dst = internNode(ids, Long.parseLong(parts[1]), maxNodes);
if (src < 0 || dst < 0)
continue;
long key = (((long) src) << 32) | (dst & 0xffffffffL);
if (seen.add(key))
edges.add(new int[] {src, dst});
}
}

int n = ids.size();
Assert.assertTrue("No Twitter2010 edges were read from " + edgeList.getAbsolutePath(), n > 0 && !edges.isEmpty());
int[] outDegree = new int[n];
for (int[] edge : edges) {
outDegree[edge[0]]++;
}

double[][] link = new double[n][n];
for (int[] edge : edges) {
link[edge[1]][edge[0]] = 1.0 / outDegree[edge[0]];
}
return link;
}

private static int internNode(Map<Long, Integer> ids, long node, int maxNodes) {
Integer index = ids.get(node);
if (index != null)
return index;
if (ids.size() >= maxNodes)
return -1;
int assigned = ids.size();
ids.put(node, assigned);
return assigned;
}
}
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