IntelĀ® MPI Library Reference Manual for Linux* OS
Select the timer used by the MPI_Wtime and MPI_Wtick calls.
I_MPI_TIMER_KIND=<timername>
<timername> |
Define the timer type |
gettimeofday |
If this setting is chosen, the MPI_Wtime and MPI_Wtick functions will work through the function gettimeofday(2). This is the default value |
rdtsc |
If this setting is chosen, the MPI_Wtime and MPI_Wtick functions will use the high resolution RDTSC timer |
Set this environment variable to select either the ordinary or RDTSC timer.
The resolution of the default gettimeofday(2) timer may be insufficient on certain platforms.