PetscSSEIsEnabled#

Determines if Intel Streaming SIMD Extensions (SSE) to the x86 instruction set can be used. Some operating systems do not allow the use of these instructions despite hardware availability.

Synopsis#

#include "petscsys.h" 
PetscErrorCode PetscSSEIsEnabled(MPI_Comm comm, PetscBool *lflag, PetscBool *gflag)

Collective

Input Parameter#

  • comm - the MPI Communicator

Output Parameters#

  • lflag - Local Flag PETSC_TRUE if enabled in this process

  • gflag - Global Flag PETSC_TRUE if enabled for all processes in comm

Options Database Key#

  • -disable_sse - Disable use of hand tuned Intel SSE implementations

Note#

NULL can be specified for lflag or gflag if either of these values are not desired.

See Also#

Profiling

Level#

developer

Location#

src/sys/utils/sseenabled.c

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