peano4::parallel Namespace Reference

Namespaces
namespace	tests

Data Structures
class	Node
	Node is Peano's abstraction for the hybrid of MPI/threads. More...
class	SpacetreeSet
	The spacetree set has to be a singleton, as it is reponsible to accept requests for new trees from remote ranks. More...
struct	StartTraversalMessage
struct	TreeEntry
struct	TreeManagementMessage

Functions
int	getTaskType (const std::string &className)
	Get unique number (id) for task.
std::string	getClassNameOfType (int taskType)

Function Documentation

getClassNameOfType()

std::string peano4::parallel::getClassNameOfType

(

int

taskType

)

getTaskType()

int peano4::parallel::getTaskType

(

const std::string &

className

)

Get unique number (id) for task.

Each task needs a unique type (number). As I don't want to hard-code these types, I use a simple factory mechanism (aka this routine) to hand out integer types. The routine internally memorises the mapping and you can query it.

Terminal output

Originally, I worked with logInfo() here to dump some info about the used task types. However, some tasks ask for their id at start-up through static variables. At this point, the logging might not be up, i.e. we rely on the linker to get the logging up first. This is generally a bad idea. Therefore, I removed outputs through our well-defined logging interface and instead dump them plainly onto std::cout.

I also omit checks that only rank 0 dumps an output. This means that you get lots of output at large rank counts, but once again code might ask for the task type before the ranks are configured properly. Actually, I used to have

if (tarch::mpi::Rank::getInstance().isGlobalMaster() ) {
  std::cout << "assign task " << className << " id " << taskTypeCounter  << std::endl;
}

but this introduced assertions, as we only can invoke isGlobalMaster() once the rank is properly configured.