06134516 is referenced by 98 patents and cites 127 patents.

The SEmulation system provides four modes of operation: (1) Software Simulation, (2) Simulation via Hardware Acceleration, (3) In-Circuit Emulation (ICE), and (4) Post-Simulation Analysis. At a high level, the present invention may be embodied in each of the above four modes or various combinations of these modes. At the core of these modes is a software kernel which controls the overall operation of this system. The main control loop of the kernel executes the following steps: initialize system, evaluate active test-bench processes/components, evaluate clock components, detect clock edge, update registers and memories, propagate combinational components, advance simulation time, and continue the loop as long as active test-bench processes are present. A Simulation server in accordance with an embodiment of the present invention allows multiple users to access the same reconfigurable hardware unit to effectively simulate and accelerate the same or different user designs in a time-shared manner in both a network and a non-network environment. The server provides the multiple users or processes to access the reconfigurable hardware unit for acceleration and hardware state swapping purposes. The Simulation server includes the scheduler, one or more device drivers, and the reconfigurable hardware unit. The scheduler in the Simulation server is based on a preemptive round robin algorithm. The server scheduler includes a simulation job queue table, a priority sorter, and a job swapper.

Title
Simulation server system and method
Application Number
850136
Publication Number
6134516
Application Date
February 5, 1998
Publication Date
October 17, 2000
Inventor
Mike Mon Yen Tsai
Los Altos Hills
CA, US
Quincy Kun Hsu Shen
Union City
CA, US
Richard Yachyang Sun
San Jose
CA, US
Ren Song Tsay
Palo Alto
CA, US
Sharon Sheau Pyng Lin
Cupertino
CA, US
Ping Sheng Tseng
Sunnyvale
CA, US
Steven Wang
Cupertino
CA, US
Agent
Oppenheimer Wolff & Donnelly
Agent
Chien Wei
Assignee
Axis Systems
CA, US
IPC
G06F 9/455
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