International Business Machines Corporation

John F Harris

Mark John Lorenc

Robert C Will

Frederick A Schwartz

A computer system allocates processor time to multiple users. A systems operator or other administrator specifies to the computer a share of processor time for each user. A particular user's CPU usage is limited to an absolute value in a 'dispatch driven' multiprocessing system through the use of a monitor built into an active wait routine. The mechanism used is a list of users whose CPU resource must be limited so that their consumption does not exceed the limit value. The limit list is active wait monitored to determine when a user should be removed from the list in a low load situation and thus deliver the maximum CPU usage to the user if it is available.

System and method for scheduling use of system resources among a plurality of limited users

Apparatus and method for communicating between a virtual machine application of a transparent services access collection and an external resource outside the collection. A second virtual machine is provided within the collection, for servicing a request to the external resource. The second virtual machine converts a VM request to CONNECT from the first virtual machine to a VTAM allocate command. An interface is provided at the collection for mapping each VM verb to a VTAM verb, for transmission over the VTAM network. The interface is bi-directional whereby VTAM commands received by a collection are mapped and converted to a VM verb and associated protocol.

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Endwell, NY, United States of America

John F Harris