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Synchronous Timer for Measurement of Network-Interconnected Personal Computers

IP.com Disclosure Number: IPCOM000058271D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Abrams, M [+details]

Abstract

Described here is an arrangement which assists timing measurements of software (e.g., communication protocols, distributed programs) running on multiple Personal Computers (PCs). The arrangement provides each PC with a clock and a periodic interrupt timer, both independently programmable to have a selectable resolution. Measurement of the performance of software running on multiple computers in a local area network is simplified by the presence of a "global" clock in each computer under test. "Global" as used here means that when two computers simultaneously read the clock, the value each obtains is guaranteed to differ by no more than a specified amount from the other one (e.g., by, at most, the least significant bit).