摘要:
A multiprocessor system maintains cache coherence among processors in a coherent domain. Within the coherent domain, a first processor can receive a command to perform a cache maintenance operation. The first processor can determine whether the cache maintenance operation is a coherent operation. For coherent operations, the first processor sends a coherent request message for distribution to other processors in the coherent domain and can cancel execution of the cache maintenance operation pending receipt of intervention messages corresponding to the coherent request. The intervention messages can reflect a global ordering of coherence traffic in the multiprocessor system and can include instructions for maintaining a data cache and an instruction cache of the first processor. Cache maintenance operations that are determined to be non-coherent can be executed at the first processor without sending the coherent request.
摘要:
A multithreading microprocessor is disclosed. The microprocessor includes a plurality of thread contexts. The microprocessor provides instructions that enable a thread context issuing the instructions to move a value between itself and a target thread context distinct from the issuing thread context independent of cooperation from the target thread context. The instructions employ an operand to specify the target thread context. In one embodiment, the microprocessor is also a virtual multiprocessor including a plurality of virtual processing elements. Each virtual processing element includes a plurality of thread contexts. The instructions also employ a second operand to specify the target virtual processing element.
摘要:
A processor comprises a software control module specifying a power performance metric. A policy manager is responsive to the software control module. A dispatch scheduler is responsive to the policy manager to operate the processor in accordance with the power performance metric.
摘要:
A method of controlling the exclusivity mode of a level-two cache includes generating level-two cache exclusivity control information at a processor in response to an exclusivity mode indicator, and utilizing the level-two cache exclusivity control information to configure the exclusivity mode of the level-two cache.
摘要:
A processor comprises a processor core executing multiple threads. A bifurcated thread scheduler includes an internal processor core component and an external processor core component. The bifurcated thread scheduler identifies when all of the multiple threads are blocked and thereafter automatically enters a default low power sleep mode.
摘要:
A method of controlling the exclusivity mode of a level-two cache includes generating level-two cache exclusivity control information at a processor in response to an exclusivity mode indicator, and utilizing the level-two cache exclusivity control information to configure the exclusivity mode of the level-two cache.
摘要:
A method of controlling the exclusivity mode of a level-two cache includes generating level-two cache exclusivity control information at a processor in response to an exclusivity mode indicator, and utilizing the level-two cache exclusivity control information to configure the exclusivity mode of the level-two cache.
摘要:
A method of controlling the exclusivity mode of a level-two cache includes generating level-two cache exclusivity control information at a processor in response to an exclusivity mode indicator, and utilizing the level-two cache exclusivity control information to configure the exclusivity mode of the level-two cache.
摘要:
A Web-based integrated circuit design system, method and computer program product tool allows design engineers to utilize a well-understood graphical interface (i.e., a Web browser) to access a wealth of data and services. The services and data include competing standard architectures and reference designs. The integrated circuit design tool allows users (e.g., design engineers) to efficiently design cores and systems-on-a-chip (SOCs). The integrated circuit design tool is a “virtual lab” which allows and aides design engineers at every stage of IC product design—architecture choice, implementation options, software development, and hardware design.