System.LibCPUID.TSC

Calculate the CPU clock, by using a time-stamp counter.

Usage:

do
  tscMark <- initialise
  mark tscMark
  foo
  unmark tscMark
  clock <- clockBy tscMark

TSCMark

data TSCMark

initialise :: IO TSCMark

Initialise a TSCMark.

mark :: TSCMark -> IO ()

Mark a time interval for calculating the CPU clock frequency.

unmark :: TSCMark -> IO ()

Unmark a time interval for calculating the CPU clock frequency.

clockBy :: TSCMark -> IO Int

Calculate the CPU clock frequency in MHz, for an interval, marked with mark, and unmark. If the interval is insufficient, the result will be -1.