示例#1
0
文件: sorter.cpp 项目: cmu-db/peloton
void Sorter::SortTopKParallel(CodeGen &codegen, llvm::Value *sorter_ptr,
                              llvm::Value *thread_states,
                              uint32_t sorter_offset, uint64_t top_k) const {
  auto *offset = codegen.Const32(sorter_offset);
  codegen.Call(SorterProxy::SortTopKParallel,
               {sorter_ptr, thread_states, offset, codegen.Const64(top_k)});
}
示例#2
0
文件: table.cpp 项目: wy4515/peloton
// Generate a scan over all tile groups.
//
// @code
// column_layouts := alloca<peloton::ColumnLayoutInfo>(
//     table.GetSchema().GetColumnCount())
//
// oid_t tile_group_idx := 0
// num_tile_groups = GetTileGroupCount(table_ptr)
//
// for (; tile_group_idx < num_tile_groups; ++tile_group_idx) {
//   tile_group_ptr := GetTileGroup(table_ptr, tile_group_idx)
//   consumer.TileGroupStart(tile_group_ptr);
//   tile_group.TidScan(tile_group_ptr, column_layouts, vector_size, consumer);
//   consumer.TileGroupEnd(tile_group_ptr);
// }
//
// @endcode
void Table::GenerateScan(CodeGen &codegen, llvm::Value *table_ptr,
                         uint32_t batch_size, ScanCallback &consumer) const {
  // First get the columns from the table the consumer needs. For every column,
  // we'll need to have a ColumnInfoLayout struct
  const uint32_t num_columns =
      static_cast<uint32_t>(table_.GetSchema()->GetColumnCount());

  llvm::Value *column_layouts = codegen->CreateAlloca(
      RuntimeFunctionsProxy::_ColumnLayoutInfo::GetType(codegen),
      codegen.Const32(num_columns));

  // Get the number of tile groups in the given table
  llvm::Value *tile_group_idx = codegen.Const64(0);
  llvm::Value *num_tile_groups = GetTileGroupCount(codegen, table_ptr);

  // Iterate over all tile groups in the table
  lang::Loop loop{codegen,
                  codegen->CreateICmpULT(tile_group_idx, num_tile_groups),
                  {{"tileGroupIdx", tile_group_idx}}};
  {
    // Get the tile group with the given tile group ID
    tile_group_idx = loop.GetLoopVar(0);
    llvm::Value *tile_group_ptr =
        GetTileGroup(codegen, table_ptr, tile_group_idx);
    llvm::Value *tile_group_id =
        tile_group_.GetTileGroupId(codegen, tile_group_ptr);

    // Invoke the consumer to let her know that we're starting to iterate over
    // the tile group now
    consumer.TileGroupStart(codegen, tile_group_id, tile_group_ptr);

    // Generate the scan cover over the given tile group
    tile_group_.GenerateTidScan(codegen, tile_group_ptr, column_layouts,
                                batch_size, consumer);

    // Invoke the consumer to let her know that we're done with this tile group
    consumer.TileGroupFinish(codegen, tile_group_ptr);

    // Move to next tile group in the table
    tile_group_idx = codegen->CreateAdd(tile_group_idx, codegen.Const64(1));
    loop.LoopEnd(codegen->CreateICmpULT(tile_group_idx, num_tile_groups),
                 {tile_group_idx});
  }
}
示例#3
0
文件: sorter.cpp 项目: cmu-db/peloton
void Sorter::StoreTupleForTopK(CodeGen &codegen, llvm::Value *sorter_ptr,
                               const std::vector<codegen::Value> &tuple,
                               uint64_t top_k) const {
  // Allocate room
  auto *space = codegen.Call(SorterProxy::StoreTupleForTopK,
                             {sorter_ptr, codegen.Const64(top_k)});

  // Serialize tuple
  UpdateableStorage::NullBitmap null_bitmap(codegen, storage_format_, space);
  for (uint32_t col_id = 0; col_id < tuple.size(); col_id++) {
    storage_format_.SetValue(codegen, space, col_id, tuple[col_id],
                             null_bitmap);
  }
  null_bitmap.WriteBack(codegen);

  // Finish
  codegen.Call(SorterProxy::StoreTupleForTopKFinish,
               {sorter_ptr, codegen.Const64(top_k)});
}