6530 Programmer's Guide

Block Mode Operation
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6530 Programmer’s Guide
RTM Support The 6530 supports Response Time Measurement (RTM): collecting
response time statistics, accepting commands to set up RTM collection
parameters, and accepting commands that solicit a response containing
the RTM data collected.
Response Time Measurement is implemented by using a configurable
number of counters (buckets) which count the number of times that
measured response intervals fall within configurable time range
boundaries (bucket boundaries) associated with each counter.
The response interval is the measured length of time between the start
and stop timing events which are configurable as either:
the press of a function key (start) and the receipt of the first resulting
character from the host (stop),
or
the press of a function key (start) and the receipt of the keyboard
unlock command (stop).
The time measurements is reported to the nearest 100 milliseconds and is
accurate within 10 percent or less.
Bucket boundaries consist of a lower boundary and upper boundary,
specified in centiseconds. The count held in the bucket is incremented by
one when a response interval measurement falls within the bucket
boundaries.
The configured number of buckets will contiguously cover the time
range from 0 to infinity. Buckets are actually defined by specifying one
or more partitions in that range, rather than explicitly specifying the start
and end value for each bucket.
For example, specifying one partition at 100 centiseconds causes two
buckets to be created - one that counts the occurrence of response
intervals in the range of 0 to 100 centiseconds and a second bucket that
counts the occurrence of response intervals greater than 100
centiseconds.
RTM recording of response intervals is enabled on entry to block mode
and also each time the RTM Controls are reset. The RTM Controls for
terminals include definition of the response interval start/stop events, the
number of buckets, and the bucket boundaries (specified as partitions).
The default RTM control settings are:
RTM response interval start/stop events are any function key press
(start) and the receipt of the keyboard unlock command (stop).
The number of buckets is 5.