DTrace Aggregating Functions

By Ifeyinwa Okoye and John Stearns, August 2006

Name	Arguments	Result

`count`	none	Number of times called.
`sum`	scalar expression	Total value of the specified expressions.
`avg`	scalar expression	Arithmetic average of the specified expressions.
`min`	scalar expression	Smallest value among the specified expressions.
`max`	scalar expression	Largest value among the specified expressions.
`lquantize`	scalar expression, lower bound, upper bound, step value	A linear frequency distribution, sized by the specified range, of the values of the specified expressions. Increments the value in the highest bucket that is less than the specified expression.
`quantize`	scalar expression	A power-of-two frequency distribution of the values of the specified expressions. Increments the value in the highest power-of-two bucket that is less than the specified expression.