Browse Prior Art Database

Time Stamp for Monitoring Processor Performance

IP.com Disclosure Number: IPCOM000041024D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Malden, AE: AUTHOR

Abstract

Once messages have been sent to a display or peripheral pro- cessor from a host computer, the perhipheral processor is usually disconnected from the host. This invention provides a way for the host to know that the messages are being processed by the peripheral processor and the performance of that processor (response time).

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Time Stamp for Monitoring Processor Performance

Once messages have been sent to a display or peripheral pro- cessor from a host computer, the perhipheral processor is usually disconnected from the host. This invention provides a way for the host to know that the messages are being processed by the peripheral processor and the performance of that processor (response time).

The solution to this problem is to allow the host computer to send messages to the peripheral processor which would be processed as if they came from a keyboard. When a "keyboard input" command is received from the host computer, the peripheral processor will process it like an input from another keyboard. A signal will be queued back to the host indicating when the message was processed by the peripheral processor and indicating the host computer as the source. In this manner the host can intersperse keyboard commands with display commands. The keyboard commands can each have a unique character. Receipt of the message from the peripheral processor containing a particular character code and a time stamp will indicate to the host computer that all the display commands received by the peripheral processor prior to the keyboard command containing the particular character code were processed prior to the time indicated by the time stamp. This data can be used to verify that the peripheral processor is functioning properly (operationally and when running diagnostics) and that system response time req...