The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1995
Filed:
Oct. 18, 1993
Mark A Boegel, Rochester, MN (US);
Douglas O Bolstad, Rochester, MN (US);
Stephen A Knight, Rochester, MN (US);
Harvey G Kiel, Rochester, MN (US);
Robert R Nelson, Oronoco, MN (US);
Pamela A Wright, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer system comprises a CPU, a main memory, and plurality of I/O Processors (IOPs), coupled to each other by a system I/O bus. The IOPs perform slave processing functions relating to I/O devices. A simulation protocol is defined for the IOPs, whereby the host CPU can command an IOP to execute a simulation script. The simulation script defines one or more I/O devices to be simulated, and specifies a simulated workload associated with the devices. The IOP executes the simulation script by sending simulated input streams to the host and receiving output destined for the simulated I/O devices from the host on the system I/O bus. An IOP may simulate multiple I/O devices, and may simulate I/O devices concurrently with servicing real I/O devices. In typical use, one or more applications programs will execute on the CPU concurrently with the execution of one or more simulation scripts in the IOPs attacked to the system I/O bus. The behavior of the system under such conditions can be used for capacity planning forecasts, for developing and debugging the application software, for reproducing and diagnosing intermittent error conditions, or for performing other tasks in which it is necessary to determine the characteristics of the system under hypothetical conditions.