BibTeX Export

@INPROCEEDINGS{lorenz_ea:2010:InstrumentTasks,
     author = {Lorenz, Daniel and Mohr, Bernd and R{\"{o}}ssel, Christian and Schmidl, Dirk and Wolf, Felix},
      month = jun,
      title = {How to reconcile event-based performance analysis with tasking in {OpenMP}},
  booktitle = {Proc. of 6th Int. Workshop of OpenMP (IWOMP), Tsukuba, Japan},
     series = {Lecture Notes in Computer Science},
     volume = {6132},
       year = {2010},
      pages = {109--121},
  publisher = {Springer},
       isbn = {978-3-642-13216-2},
        doi = {10.1007/978-3-642-13217-9_9},
   abstract = {With version 3.0, the OpenMP specification introduced a task construct and
  with it an additional dimension of concurrency. While offering a convenient
  means to express task parallelism, the new construct presents a serious
  challenge to event-based performance analysis. Since tasking may disrupt the
  classic sequence of region entry and exit events, essential analysis
  procedures such as reconstructing dynamic call paths or correctly
  attributing performance metrics to individual task region instances may
  become impossible. To overcome this limitation, we describe a portable
  method to distinguish individual task instances and to track their
  suspension and resumption with event-based instrumentation.  Implemented as
  an extension of the OPARI source-code instrumenter, our portable solution
  supports C/C++ programs with tied tasks and with untied tasks that are
  suspended only at implied scheduling points, while introducing only
  negligible measurement overhead. Finally, we discuss possible extensions of
  the OpenMP specification to provide general support for task identifiers
  with untied tasks.}
}