BlasThreadingEnv Class Reference

service class for explicitly managing the threading of BLAS/LAPACK calls from OpenMP parallel region More...

Collaboration diagram for BlasThreadingEnv:

Public Member Functions
	BlasThreadingEnv (int num_threads)
	Constructor, obtains the number of threads at the next level. More...
	~BlasThreadingEnv ()

Static Public Member Functions
static bool	NestedThreadingSupported ()

Private Attributes
int	old_state_

Detailed Description

service class for explicitly managing the threading of BLAS/LAPACK calls from OpenMP parallel region

intended to use only locally around heavy calls.

Definition at line 22 of file BlasThreadingEnv.h.

Constructor & Destructor Documentation

BlasThreadingEnv()

BlasThreadingEnv

(

int

num_threads

)

Constructor, obtains the number of threads at the next level.

Definition at line 22 of file BlasThreadingEnv.cpp.

References BlasThreadingEnv::old_state_.

{
#ifdef HAVE_MKL
  old_state_ = mkl_set_num_threads_local(num_threads);
#else
  old_state_ = 0;
#endif
}

~BlasThreadingEnv()

~BlasThreadingEnv

(

)

Definition at line 31 of file BlasThreadingEnv.cpp.

References BlasThreadingEnv::old_state_.

{
#ifdef HAVE_MKL
  mkl_set_num_threads_local(old_state_);
#endif
}

Member Function Documentation

NestedThreadingSupported()

bool NestedThreadingSupported ( )

static

Definition at line 38 of file BlasThreadingEnv.cpp.

Referenced by DelayedUpdate< T, T_FP >::updateInvMat().

{
#ifdef HAVE_MKL
  return true;
#else
  return false;
#endif
}

Member Data Documentation

old_state_

int old_state_

private

Definition at line 24 of file BlasThreadingEnv.h.

Referenced by BlasThreadingEnv::BlasThreadingEnv(), and BlasThreadingEnv::~BlasThreadingEnv().

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The documentation for this class was generated from the following files:

• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/Platforms/CPU/BlasThreadingEnv.h
• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/Platforms/CPU/BlasThreadingEnv.cpp