Documentation

Fields

• bytesAllocated :: !Int64

  Total number of bytes allocated

• numGcs :: !Int64

  Number of garbage collections performed (any generation, major and minor)

• maxBytesUsed :: !Int64

  Maximum number of live bytes seen so far

• numByteUsageSamples :: !Int64

  Number of byte usage samples taken, or equivalently the number of major GCs performed.

• cumulativeBytesUsed :: !Int64

  Sum of all byte usage samples, can be used with numByteUsageSamples to calculate averages with arbitrary weighting (if you are sampling this record multiple times).

• bytesCopied :: !Int64

  Number of bytes copied during GC

• currentBytesUsed :: !Int64

  Number of live bytes at the end of the last major GC

• currentBytesSlop :: !Int64

  Current number of bytes lost to slop

• maxBytesSlop :: !Int64

  Maximum number of bytes lost to slop at any one time so far

• peakMegabytesAllocated :: !Int64

  Maximum number of megabytes allocated

• mutatorCpuSeconds :: !Double

  CPU time spent running mutator threads. This does not include any profiling overhead or initialization.

• mutatorWallSeconds :: !Double

  Wall clock time spent running mutator threads. This does not include initialization.

• gcCpuSeconds :: !Double

  CPU time spent running GC

• gcWallSeconds :: !Double

  Wall clock time spent running GC

• cpuSeconds :: !Double

  Total CPU time elapsed since program start

• wallSeconds :: !Double

  Total wall clock time elapsed since start

• parTotBytesCopied :: !Int64

  Number of bytes copied during GC, minus space held by mutable lists held by the capabilities. Can be used with parMaxBytesCopied to determine how well parallel GC utilized all cores.

• parMaxBytesCopied :: !Int64

  Sum of number of bytes copied each GC by the most active GC thread each GC. The ratio of parTotBytesCopied divided by parMaxBytesCopied approaches 1 for a maximally sequential run and approaches the number of threads (set by the RTS flag -N) for a maximally parallel run.