folly::SlidingWindowQuantileEstimator< ClockT > Class Template Reference

#include <QuantileEstimator.h>

Public Types
using	TimePoint = typename ClockT::time_point

Public Member Functions
	SlidingWindowQuantileEstimator (std::chrono::seconds windowDuration, size_t nWindows=60)
QuantileEstimates	estimateQuantiles (Range< const double * > quantiles, TimePoint now=ClockT::now())
void	addValue (double value, TimePoint now=ClockT::now())
void	flush ()
	Flush buffered values. More...

Private Attributes
detail::BufferedSlidingWindow< TDigest, ClockT >	bufferedSlidingWindow_

Detailed Description

template<typename ClockT = std::chrono::steady_clock>
class folly::SlidingWindowQuantileEstimator< ClockT >

Definition at line 62 of file QuantileEstimator.h.

Member Typedef Documentation

template<typename ClockT = std::chrono::steady_clock>

using folly::SlidingWindowQuantileEstimator< ClockT >::TimePoint = typename ClockT::time_point

Definition at line 64 of file QuantileEstimator.h.

Constructor & Destructor Documentation

template<typename ClockT >

folly::SlidingWindowQuantileEstimator< ClockT >::SlidingWindowQuantileEstimator	(	std::chrono::seconds	windowDuration,
		size_t	nWindows = 60
	)

Definition at line 50 of file QuantileEstimator-defs.h.

    : bufferedSlidingWindow_(nWindows, windowDuration, 1000, 100) {}

Member Function Documentation

template<typename ClockT >

void folly::SlidingWindowQuantileEstimator< ClockT >::addValue	(	double	value,
		TimePoint	now = ClockT::now()
	)

Definition at line 65 of file QuantileEstimator-defs.h.

References folly::SlidingWindowQuantileEstimator< ClockT >::bufferedSlidingWindow_.

Referenced by TEST().

                   {
  bufferedSlidingWindow_.append(value, now);
}

template<typename ClockT >

QuantileEstimates folly::SlidingWindowQuantileEstimator< ClockT >::estimateQuantiles	(	Range< const double * >	quantiles,
		TimePoint	now = ClockT::now()
	)

Definition at line 56 of file QuantileEstimator-defs.h.

References folly::SlidingWindowQuantileEstimator< ClockT >::bufferedSlidingWindow_, folly::detail::estimatesFromDigest(), and folly::TDigest::merge().

                   {
  auto digests = bufferedSlidingWindow_.get(now);
  auto digest = TDigest::merge(digests);
  return detail::estimatesFromDigest(digest, quantiles);
}

template<typename ClockT = std::chrono::steady_clock>

void folly::SlidingWindowQuantileEstimator< ClockT >::flush ( )

inline

Flush buffered values.

Definition at line 77 of file QuantileEstimator.h.

               {
    bufferedSlidingWindow_.flush();
  }

Member Data Documentation

template<typename ClockT = std::chrono::steady_clock>

detail::BufferedSlidingWindow<TDigest, ClockT> folly::SlidingWindowQuantileEstimator< ClockT >::bufferedSlidingWindow_

private

Definition at line 82 of file QuantileEstimator.h.

Referenced by folly::SlidingWindowQuantileEstimator< ClockT >::addValue(), and folly::SlidingWindowQuantileEstimator< ClockT >::estimateQuantiles().

---

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

• proxygen/folly/folly/stats/QuantileEstimator.h
• proxygen/folly/folly/stats/QuantileEstimator-defs.h