RandomGenerator.h File Reference

Declare a global Random Number Generator. More...

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Classes
class	RNGThreadSafe< RNG >

Namespaces
	qmcplusplus
	helper functions for EinsplineSetBuilder

Macros
#define	Random   random_global

Typedefs
using	RandomGenerator = StdRandom< OHMMS_PRECISION_FULL >

Functions
uint32_t	make_seed (int i, int n)

Detailed Description

Declare a global Random Number Generator.

Selected among

• std::mt19937 qmcplusplus::Random() returns a random number [0,1) For OpenMP is enabled, it is important to use thread-safe boost::random. Each thread uses its own random number generator with a distinct seed. This prevents a use of global lock which will slow down the applications significantly.

Definition in file RandomGenerator.h.

Macro Definition Documentation

Random

#define Random   random_global

Definition at line 57 of file RandomGenerator.h.

Referenced by CSVMCUpdateAll::advanceWalker(), CSVMCUpdateAllWithDrift::advanceWalker(), QMCMain::executeCMCSection(), RandomNumberControl::get(), WalkerReconfiguration::getIndexPermutation(), main(), RandomNumberControl::make_seeds(), qmcplusplus::makeGaussRandom(), qmcplusplus::makeSphereRandom(), qmcplusplus::makeUniformRandom(), DMCBatched::process(), RandomNumberControl::put(), qmcplusplus::randomize(), RandomNumberControl::read_parallel(), RandomNumberControl::read_rank_0(), WaveFunctionTester::runRatioTest(), WalkerReconfigurationMPI::swapWalkers(), RandomNumberControl::write_parallel(), and RandomNumberControl::write_rank_0().

Function Documentation

make_seed()

uint32_t make_seed	(	int	i,
		int	n
	)

Definition at line 17 of file RandomGenerator.cpp.

References qmcplusplus::n.

Referenced by qmcplusplus::TEST_CASE().

{ return static_cast<uint32_t>(std::time(0)) % 10474949 + (i + 1) * n + i; }