摘要:
Method and apparatus for a computer system to efficiently operate with multiple instruction processors and input/output subsystem in a symmetrical multi-processing environment. The computer system uses a new storage controller having a high performance interconnect scheme that scales in system performance as additional common storage controller modules are added. The interconnect scheme has the cost advantage of a bus connected system while achieving the performance characteristics of a crossbar connected system.
摘要:
A computing system and method of executing a software program and translation of instructions for an emulated computing environment. The computing system includes a programmable circuit capable of executing native instructions of a first instruction set architecture and incapable of executing non-native instructions of a second instruction set architecture. The emulator operates within an interface layer and translates non-native applications hosted within an emulated operating system for execution. The computing system includes translated memory banks defined at least in part by the emulated operating system and capable of native execution on the programmable circuit, where the emulated operating system is incapable of execution on the programmable circuit. The computing system includes a linker configured to manage association of at least one of the one or more translated memory banks to the interface layer for native execution by the programmable circuit in place of a corresponding bank of non-native instructions.
摘要:
A system and method for managing memory data is provided. Data stored within a main memory may be requested by multiple requesters that may include one or more cache memories. When the data is provided by the main memory to a requester, it will be provided in a state that is based on the way the data was recently used by the requesters. For example, if a pattern of read-only usage has been established for the data, the data will be returned to a requester in a shared state. If data that was provided in a shared state must be updated such that the requester is required return to main memory to obtain read/write privileges, the main memory will thereafter provide the data in an exclusive state that allows write operations to be completed. This will continue until a pattern of read-only usage is again established.
摘要:
The current invention provides a system and method for managing requests from one or more requesters to one or more resources. These requests, which may be any of multiple request types, are prioritized using one or more threshold values. Each threshold value is associated with one or more of the request types, and defines the maximum number of requests of the associated types that may be pending to the resources before the threshold is reached. When all associated thresholds have been reached for requests of one or more predetermined request types, an indication is provided to re-issue requests of those types at a later time. A priority scheme is used to allow re-issued requests to systematically gain access to the shared resource to prevent the starvation of any given requester.
摘要:
A method and apparatus for generating test input for a logic simulator by providing a template that allows a test designer to more efficiently enter the desired test conditions. The template is preferably arranged to facilitate the definition of test cases, and in particular, parallel type test cases. One region of the template is preferably dedicated to one section of a circuit design, and another region is dedicated to another section of the circuit design. When the regions are positioned side-by-side, for example, the test designer can easily identify the test conditions that are applied to the various circuit sections, including the relationships therebetween. Once the test conditions are entered, the template is processed and the desired test input is automatically generated.
摘要:
Method and apparatus for synchronizing the execution of the two or more test lists at desired synchronization points, while allowing the test lists to execute in a non-deterministic manner between the synchronization points is disclosed. A test driver is provided for executing each test list, and a run controller is provided for monitoring the execution of each test list. To synchronize the execution of the two or more test lists, the run controller halts the execution of each test list as each test driver assumes a predetermined state. Once all of the test lists are halted, the test lists are synchronized. Once synchronized, selected test drivers are restarted to continue execution of the corresponding test lists in a relatively non-deterministic manner.
摘要:
Method and apparatus for reducing address/function transfer pins in a system where cache memories in a system controller are accessed by a number of instruction processors. The reduction of pins is obtained by using two data transfers. The increase in data addressing time, which would otherwise occur using two data transfers, is reduced to nearly the time of the data transfers themselves by responding to the first data transfer while the second data transfer is taking place.
摘要:
An apparatus and method for transferring data sets between a storage controller and a number of daisy chained main memories on separate circuit elements at high speed. Each main memory has coupled control logic which receives a data set from the storage controller, latches and retransmits the data set to the next main control logic and coupled memory, which next control logic repeats the process, and which can be continued through a number of coupled control logic units and main memories. A data set includes a header with an address range and function information. If data is to be sent from the storage controller it is appended to the header. Each storage controller compares the address range with the address range of the coupled memory, and if within the address range and for a write, will store the appended data in the header address in the coupled memory. If within the address range and for a read, each storage controller will read the data addressed in the header from the coupled memory and return the data to the storage controller. Because of the direct access these transfer occur at high data rates. The limited number of connections used in this transfer permits accessing main memories on a circuit element using this apparatus and method.
摘要:
A storage lock apparatus for a multiprocessor data processing system. The storage lock apparatus includes control for granting locks to different selectable portions of storage in parallel. In addition, acknowledgment from a remote lock controller is not required for a processor to obtain a lock on an address, even if the address for which the lock was requested is not local relative to the processor. Parallel priority queues are employed for parallel handling of storage lock functions and general storage operations, thereby reducing contention for priority between storage lock operations and general storage operations where there are no addressing conflicts.
摘要:
An apparatus for and method of efficiently providing a modular dayclock within a data processing system. This is accomplished by dividing the dayclock hardware into a number of dayclock modules configured to operate in a bit serial fashion. This allows the dayclock to accommodate a variety of dayclock word widths by simply varying the number of dayclock modules provided. Further, since the dayclock may operate serially, rather than in parallel fashion, the number of dayclock module I/O's and board route channels may be substantially reduced. Finally, all control logic may be provided directly in the dayclock modules, thereby eliminating the need for a central dayclock controller.