base-4.14.0.0: Basic libraries
Safe HaskellTrustworthy
LanguageHaskell2010

GHC.Stats

Description

This module provides access to internal garbage collection and memory usage statistics. These statistics are not available unless a program is run with the -T RTS flag.

This module is GHC-only and should not be considered portable.

Since: 4.5.0.0

Synopsis

Runtime statistics

data RTSStats Source #

Statistics about runtime activity since the start of the program. This is a mirror of the C struct RTSStats in RtsAPI.h

Since: 4.10.0.0

Constructors

RTSStats 

Fields

Instances

Instances details
Read RTSStats Source #

Since: 4.10.0.0

Instance details

Defined in GHC.Stats

Show RTSStats Source #

Since: 4.10.0.0

Instance details

Defined in GHC.Stats

data GCDetails Source #

Statistics about a single GC. This is a mirror of the C struct GCDetails in RtsAPI.h, with the field prefixed with gc_ to avoid collisions with RTSStats.

Constructors

GCDetails 

Fields

Instances

Instances details
Read GCDetails Source #

Since: 4.10.0.0

Instance details

Defined in GHC.Stats

Show GCDetails Source #

Since: 4.10.0.0

Instance details

Defined in GHC.Stats

type RtsTime = Int64 Source #

Time values from the RTS, using a fixed resolution of nanoseconds.

getRTSStats :: IO RTSStats Source #

Get current runtime system statistics.

Since: 4.10.0.0

getRTSStatsEnabled :: IO Bool Source #

Returns whether GC stats have been enabled (with +RTS -T, for example).

Since: 4.10.0.0