Silicon Graphics, Incorporated

Cray Incorporated

James G Bravatto

James Robert Kohn

Andrew B Hastings

Richard D Pribnow

Kitrick Sheets

Josh Williams

Michael T Bye

John Theodore Kline

Peter Hill

Greg Titus

Jonathan Gettler

Steve Piatz

Systems and methods for scheduling program units that are part of a process executed within an operating system are disclosed. Additionally, at least one thread is started within the operating system, the thread is associated with the process. Further, a plurality of streams within the thread are selected for execution on a multiple processor unit. Upon the occurrence of a context shifting event, one of the streams enters a kernel mode. If the first stream to enter kernel mode must block, then the execution of the other streams of the plurality of streams is also blocked.

Scheduling synchronization of programs running as streams on multiple processors

A ring computer network system having a communication controller for controller the receipt and sending of packets or messages at each client computer. The interface associated with each client computer includes a send message buffer and a receive message buffer. The send message buffer has a send message buffer counter which increments upwardly in response to messages being received from the client computer for sending on the ring network. The communication controller sends messages from the send buffer until the send message buffer counter reaches the address or a value associated with the last received message. Similarly, the receive message buffer includes a receive message buffer counter which increments as each message is received to a receive message buffer counter value. The receive message buffer is emptied until the receive message buffer counter value is reached. The receive buffer can also have a foreground portion and a background portion. The send buffer can also have a background portion and a foreground portion of memory. The communication controller continually switches between the foreground and background portions of memory and redesignates each memory portion after the switch. The communications controller can also recognize priority schemes for the messages.

Message buffering for a computer-based network

Growing community of inventors

Inver Grove Heights, MN, United States of America

James G Bravatto