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More fun with subcircuit mining

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This commit is contained in:
Clifford Wolf 2013-03-02 17:44:17 +01:00
parent 23eb0ba8bc
commit 5bb7578c91
2 changed files with 47 additions and 24 deletions
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15
libs/subcircuit/README
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@ -333,16 +333,19 @@ at most maxNodes nodes that occurs at least minMatches times:
std::vector<SubCircuit::Solver::MineResult> results; std::vector<SubCircuit::Solver::MineResult> results;
mySolver.mine(results, minNodes, maxNodes, minMatches); mySolver.mine(results, minNodes, maxNodes, minMatches);
The mine() method has an optional fifth parameter that limits the number The mine() method has an optional fifth parameter that limits the number of
of matches counted in one graph. This can be useful when mining for circuits matches counted in one graph. This can be useful when mining for circuits that
that are found in at least a number of graphs. E.g. the following call are found in at least a number of graphs. E.g. the following call would find
would find all subcircuits with 5 nodes that are found in at least 7 of all subcircuits with 5 nodes that are found in at least 7 of the registered
the registered graphs: graphs:
mySolver.mine(results, 5, 5, 7, 1); mySolver.mine(results, 5, 5, 7, 1);
Note that this miner is not very efficient and therefore its use is not Note that this miner is not very efficient and therefore its use is not
recommended for large circuits. recommended for large circuits. Also note that the miner is working under the
assumption that subgraph isomorphism is bidirectional. This is not the case in
circuits with gates with shorted pins. This can result in undetected frequent
subcircuits in some corner cases.
Debugging Debugging

56
libs/subcircuit/subcircuit.cc
View file

@ -1176,7 +1176,7 @@ class SubCircuit::SolverWorker
verbose = backupVerbose; verbose = backupVerbose;
} }
int testForMining(std::vector<Solver::MineResult> &results, std::set<NodeSet> &usedSets, std::vector<std::set<NodeSet>> &nextPool, NodeSet &testSet, int testForMining(std::vector<Solver::MineResult> &results, std::set<NodeSet> &usedSets, std::set<NodeSet> &nextPool, NodeSet &testSet,
const std::string &graphId, const Graph &graph, int minNodes, int minMatches, int limitMatchesPerGraph) const std::string &graphId, const Graph &graph, int minNodes, int minMatches, int limitMatchesPerGraph)
{ {
// printf("test: %s\n", testSet.to_string().c_str()); // printf("test: %s\n", testSet.to_string().c_str());
@ -1205,10 +1205,21 @@ class SubCircuit::SolverWorker
// printf("match: %s%s\n", resultSet.to_string().c_str(), usedSets.count(resultSet) > 0 ? " (dup)" : ""); // printf("match: %s%s\n", resultSet.to_string().c_str(), usedSets.count(resultSet) > 0 ? " (dup)" : "");
#if 0
if (usedSets.count(resultSet) > 0) { if (usedSets.count(resultSet) > 0) {
// FIXME: assert(thisNodeSetSet.count(resultSet) > 0); // Because of shorted pins isomorphisim is not always bidirectional!
//
// This means that the following assert is not true in all cases and subgraph A might
// show up in the matches for subgraph B but not vice versa... This also means that the
// order in which subgraphs are processed has an impact on the results set.
//
assert(thisNodeSetSet.count(resultSet) > 0);
continue; continue;
} }
#else
if (thisNodeSetSet.count(resultSet) > 0)
continue;
#endif
usedSets.insert(resultSet); usedSets.insert(resultSet);
thisNodeSetSet.insert(resultSet); thisNodeSetSet.insert(resultSet);
@ -1236,16 +1247,18 @@ class SubCircuit::SolverWorker
results.push_back(result); results.push_back(result);
} }
nextPool.push_back(thisNodeSetSet); nextPool.insert(thisNodeSetSet.begin(), thisNodeSetSet.end());
return matches; return matches;
} }
void findNodePairs(std::vector<Solver::MineResult> &results, std::vector<std::set<NodeSet>> &nodePairs, int minNodes, int minMatches, int limitMatchesPerGraph) void findNodePairs(std::vector<Solver::MineResult> &results, std::set<NodeSet> &nodePairs, int minNodes, int minMatches, int limitMatchesPerGraph)
{ {
int groupCounter = 0;
std::set<NodeSet> usedPairs; std::set<NodeSet> usedPairs;
nodePairs.clear();
if (verbose) if (verbose)
printf("\nFind frequent node pairs:\n"); printf("\nMining for frequent node pairs:\n");
for (auto &graph_it : graphData) for (auto &graph_it : graphData)
for (int node1 = 0; node1 < int(graph_it.second.graph.nodes.size()); node1++) for (int node1 = 0; node1 < int(graph_it.second.graph.nodes.size()); node1++)
@ -1263,25 +1276,28 @@ class SubCircuit::SolverWorker
if (verbose) if (verbose)
printf("Pair %s[%s,%s] -> %d%s\n", graphId.c_str(), graph.nodes[node1].nodeId.c_str(), printf("Pair %s[%s,%s] -> %d%s\n", graphId.c_str(), graph.nodes[node1].nodeId.c_str(),
graph.nodes[node2].nodeId.c_str(), matches, matches < minMatches ? " *min*" : ""); graph.nodes[node2].nodeId.c_str(), matches, matches < minMatches ? " *purge*" : "");
if (minMatches <= matches)
groupCounter++;
} }
if (verbose) if (verbose)
printf("found %d.\n", int(nodePairs.size())); printf("Found a total of %d subgraphs in %d groups.\n", int(nodePairs.size()), groupCounter);
} }
void findNextPool(std::vector<Solver::MineResult> &results, std::vector<std::set<NodeSet>> &pool, void findNextPool(std::vector<Solver::MineResult> &results, std::set<NodeSet> &pool,
int oldSetSize, int increment, int minNodes, int minMatches, int limitMatchesPerGraph) int oldSetSize, int increment, int minNodes, int minMatches, int limitMatchesPerGraph)
{ {
std::vector<std::set<NodeSet>> nextPool; int groupCounter = 0;
std::map<std::string, std::vector<const NodeSet*>> poolPerGraph; std::map<std::string, std::vector<const NodeSet*>> poolPerGraph;
std::set<NodeSet> nextPool;
for (auto &i1 : pool) for (auto &it : pool)
for (auto &i2 : i1) poolPerGraph[it.graphId].push_back(&it);
poolPerGraph[i2.graphId].push_back(&i2);
if (verbose) if (verbose)
printf("\nFind frequent subcircuits of size %d using increment %d:\n", oldSetSize+increment, increment); printf("\nMining for frequent subcircuits of size %d using increment %d:\n", oldSetSize+increment, increment);
std::set<NodeSet> usedSets; std::set<NodeSet> usedSets;
for (auto &it : poolPerGraph) for (auto &it : poolPerGraph)
@ -1309,16 +1325,20 @@ class SubCircuit::SolverWorker
printf("%s%s", first ? "" : ",", graph.nodes[nodeIdx].nodeId.c_str()); printf("%s%s", first ? "" : ",", graph.nodes[nodeIdx].nodeId.c_str());
first = false; first = false;
} }
printf("] -> %d%s\n", matches, matches < minMatches ? " *min*" : ""); printf("] -> %d%s\n", matches, matches < minMatches ? " *purge*" : "");
} }
if (minMatches <= matches)
groupCounter++;
} }
pool.swap(nextPool);
if (verbose) if (verbose)
printf("found %d.\n", int(nextPool.size())); printf("Found a total of %d subgraphs in %d groups.\n", int(pool.size()), groupCounter);
pool.swap(nextPool);
} }
// interface to the public Solver class // interface to the public solver class
protected: protected:
SolverWorker(Solver *userSolver) : userSolver(userSolver), verbose(false) SolverWorker(Solver *userSolver) : userSolver(userSolver), verbose(false)
@ -1400,7 +1420,7 @@ protected:
void mine(std::vector<Solver::MineResult> &results, int minNodes, int maxNodes, int minMatches, int limitMatchesPerGraph) void mine(std::vector<Solver::MineResult> &results, int minNodes, int maxNodes, int minMatches, int limitMatchesPerGraph)
{ {
int nodeSetSize = 2; int nodeSetSize = 2;
std::vector<std::set<NodeSet>> pool; std::set<NodeSet> pool;
findNodePairs(results, pool, minNodes, minMatches, limitMatchesPerGraph); findNodePairs(results, pool, minNodes, minMatches, limitMatchesPerGraph);
while ((maxNodes < 0 || nodeSetSize < maxNodes) && pool.size() > 0) while ((maxNodes < 0 || nodeSetSize < maxNodes) && pool.size() > 0)