Histogram

This module contains the L23 port histogram classes that deal with configuration of data collection and retrieval of samples from a port.

The histogram command names all have the form PD_<xxx> and require both a module index id and a port index id, as well as a sub-index identifying a particular histogram.

A histogram has a number of buckets and counts the packets transmitted or received on a port, possibly limited to those with a particular test payload id. The packet length, inter-frame gap preceding it, or its latency is measured, and the bucket whose range contains this value is incremented.

While a histogram is actively collecting samples its parameters cannot be changed.

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