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timemory-ompt library

Produces a libtimemory-ompt.so library which uses the OpenMP-tools (OMP-T) interface.

Four functions are provided for C, C++, and Fortran:

  • uint64_t timemory_start_ompt()
    • Returns the number of initializations
  • uint64_t timemory_stop_ompt(uint64_t idx)
    • Removes the initialization request at idx
    • Returns the number of remaining initializations
  • void timemory_register_ompt()
    • Ensures a global initialization exists until it deregistration
  • void timemory_deregister_ompt()
    • Deactivates the global initialization

Usage

The environement variable ENABLE_TIMEMORY_OMPT (default: "ON") controls configuration of the instrumentation. This library configures the tim::user_ompt_bundle component with the components specified by the following environment variables in terms of priority:

  • TIMEMORY_OMPT_COMPONENTS
  • TIMEMORY_TRACE_COMPONENTS
  • TIMEMORY_PROFILER_COMPONENTS
  • TIMEMORY_GLOBAL_COMPONENTS

When one of the above environment variables are set to "none", then the priority search for component configurations is abandoned.

Examples

The following will result in MPI function instrumented with cpu_clock:

export TIMEMORY_OMPT_COMPONENTS="cpu_clock"
export TIMEMORY_PROFILER_COMPONENTS="peak_rss"
export TIMEMORY_GLOBAL_COMPONENTS="wall_clock"

The following will result in MPI functions containing no instrumentation:

export TIMEMORY_OMPT_COMPONENTS="none"
export TIMEMORY_PROFILER_COMPONENTS="peak_rss"
export TIMEMORY_GLOBAL_COMPONENTS="wall_clock"

The following will result in MPI function instrumented with wall_clock and page_rss:

export TIMEMORY_OMPT_COMPONENTS=""
export TIMEMORY_GLOBAL_COMPONENTS="wall_clock,page_rss"