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Adds a special graph for MLD with effcient boundary scan

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This graph enables efficient boundary edge scans at each level.
Currenly this needs about |V|*|L| bytes of storage.
We can optimize this when the highest boundary nodes ID is << |V|.
This commit is contained in:
Patrick Niklaus
2017-03-07 03:59:28 +00:00
committed by Patrick Niklaus
parent 58681fa7ea
commit 655ca803d8
12 changed files with 518 additions and 131 deletions
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src/storage/storage.cpp
+19 -8
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@@ -447,21 +447,27 @@ void Storage::PopulateLayout(DataLayout &layout)
io::FileReader reader(config.mld_graph_path, io::FileReader::VerifyFingerprint);
const auto num_nodes =
reader.ReadVectorSize<customizer::StaticEdgeBasedGraph::NodeArrayEntry>();
reader.ReadVectorSize<customizer::MultiLevelEdgeBasedGraph::NodeArrayEntry>();
const auto num_edges =
reader.ReadVectorSize<customizer::StaticEdgeBasedGraph::EdgeArrayEntry>();
reader.ReadVectorSize<customizer::MultiLevelEdgeBasedGraph::EdgeArrayEntry>();
const auto num_node_offsets =
reader.ReadVectorSize<customizer::MultiLevelEdgeBasedGraph::EdgeOffset>();
layout.SetBlockSize<customizer::StaticEdgeBasedGraph::NodeArrayEntry>(
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::NodeArrayEntry>(
DataLayout::MLD_GRAPH_NODE_LIST, num_nodes);
layout.SetBlockSize<customizer::StaticEdgeBasedGraph::EdgeArrayEntry>(
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::EdgeArrayEntry>(
DataLayout::MLD_GRAPH_EDGE_LIST, num_edges);
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::EdgeOffset>(
DataLayout::MLD_GRAPH_NODE_TO_OFFSET, num_node_offsets);
}
else
{
layout.SetBlockSize<customizer::StaticEdgeBasedGraph::NodeArrayEntry>(
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::NodeArrayEntry>(
DataLayout::MLD_GRAPH_NODE_LIST, 0);
layout.SetBlockSize<customizer::StaticEdgeBasedGraph::EdgeArrayEntry>(
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::EdgeArrayEntry>(
DataLayout::MLD_GRAPH_EDGE_LIST, 0);
layout.SetBlockSize<customizer::MultiLevelEdgeBasedGraph::EdgeOffset>(
DataLayout::MLD_GRAPH_NODE_TO_OFFSET, 0);
}
}
}
@@ -938,16 +944,21 @@ void Storage::PopulateData(const DataLayout &layout, char *memory_ptr)
io::FileReader reader(config.mld_graph_path, io::FileReader::VerifyFingerprint);
auto nodes_ptr =
layout.GetBlockPtr<customizer::StaticEdgeBasedGraph::NodeArrayEntry, true>(
layout.GetBlockPtr<customizer::MultiLevelEdgeBasedGraph::NodeArrayEntry, true>(
memory_ptr, DataLayout::MLD_GRAPH_NODE_LIST);
auto edges_ptr =
layout.GetBlockPtr<customizer::StaticEdgeBasedGraph::EdgeArrayEntry, true>(
layout.GetBlockPtr<customizer::MultiLevelEdgeBasedGraph::EdgeArrayEntry, true>(
memory_ptr, DataLayout::MLD_GRAPH_EDGE_LIST);
auto node_to_offset_ptr =
layout.GetBlockPtr<customizer::MultiLevelEdgeBasedGraph::EdgeOffset, true>(
memory_ptr, DataLayout::MLD_GRAPH_NODE_TO_OFFSET);
auto num_nodes = reader.ReadElementCount64();
reader.ReadInto(nodes_ptr, num_nodes);
auto num_edges = reader.ReadElementCount64();
reader.ReadInto(edges_ptr, num_edges);
auto num_node_to_offset = reader.ReadElementCount64();
reader.ReadInto(node_to_offset_ptr, num_node_to_offset);
}
}
}