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This mechanism allows measurement of the time between a host computer simulated "attention operation" and the host "applications" response without operator intervention.
English (United States)
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Host Triggered Device Response Time Measurement
This mechanism allows measurement of the time between a host computer
simulated "attention operation" and the host "applications" response without
The illustrated computer system includes a host computer 10 containing one
or more applications, connected through a local or teleprocessing network 18 to
one or more controllers 12, which in turn are connected by respective
transmission lines 20 to displays 14 with host attention generating input devices
(keyboard, "selector" pen, magnetic reader, etc.) 16.
Response time measurement techniques typically involve measuring the time
from an operator operation using an input device 16. The resulting attention is
transmitted to the controller 12 and through the network 18, to the host computer 10. The host then responds to this attention and transmits a message back
through the network 18 to the controller 12 back to the display 14. This has two
negative aspects: an operator is required to initiate the measurement, and any
general host response could terminate it.
With this mechanism, the target device 14 is placed in a unique response
time measurement mode, either via a command from the host 10 or by a local
control unit 12 option. The host 10 then sends a special command to the device 14. Receipt of the command by the device 14 generates an inbound request and
starts the response time measurement.
When the host 10 receives this request, another comman...