摘要:
A first SMP computer has first and second processing units and a first system memory pool, a second SMP computer has third and fourth processing units and a second system memory pool, and a third SMP computer has at least fifth and sixth processing units and third, fourth and fifth system memory pools. The fourth system memory pool is inaccessible to the third, fourth and sixth processing units and accessible to at least the second and fifth processing units, and the fifth system memory pool is inaccessible to the first, second and sixth processing units and accessible to at least the fourth and fifth processing units. A first interconnect couples the second processing unit for load-store coherent, ordered access to the fourth system memory pool, and a second interconnect couples the fourth processing unit for load-store coherent, ordered access to the fifth system memory pool.
摘要:
A first SMP computer has first and second processing units and a first system memory pool, a second SMP computer has third and fourth processing units and a second system memory pool, and a third SMP computer has at least fifth and sixth processing units and third, fourth and fifth system memory pools. The fourth system memory pool is inaccessible to the third, fourth and sixth processing units and accessible to at least the second and fifth processing units, and the fifth system memory pool is inaccessible to the first, second and sixth processing units and accessible to at least the fourth and fifth processing units. A first interconnect couples the second processing unit for load-store coherent, ordered access to the fourth system memory pool, and a second interconnect couples the fourth processing unit for load-store coherent, ordered access to the fifth system memory pool.
摘要:
A first SMP computer has first and second processing units and a first system memory pool, a second SMP computer has third and fourth processing units and a second system memory pool, and a third SMP computer has at least fifth and sixth processing units and third, fourth and fifth system memory pools. The fourth system memory pool is inaccessible to the third, fourth and sixth processing units and accessible to at least the second and fifth processing units, and the fifth system memory pool is inaccessible to the first, second and sixth processing units and accessible to at least the fourth and fifth processing units. A first interconnect couples the second processing unit for load-store coherent, ordered access to the fourth system memory pool, and a second interconnect couples the fourth processing unit for load-store coherent, ordered access to the fifth system memory pool.
摘要:
A first SMP computer has first and second processing units and a first system memory pool, a second SMP computer has third and fourth processing units and a second system memory pool, and a third SMP computer has at least fifth and sixth processing units and third, fourth and fifth system memory pools. The fourth system memory pool is inaccessible to the third, fourth and sixth processing units and accessible to at least the second and fifth processing units, and the fifth system memory pool is inaccessible to the first, second and sixth processing units and accessible to at least the fourth and fifth processing units. A first interconnect couples the second processing unit for load-store coherent, ordered access to the fourth system memory pool, and a second interconnect couples the fourth processing unit for load-store coherent, ordered access to the fifth system memory pool.
摘要:
A heterogeneous processing element model is provided where I/O devices look and act like processors. In order to be treated like a processor, an I/O processing element, or other special purpose processing element, must follow some rules and have some characteristics of a processor, such as address translation, security, interrupt handling, and exception processing, for example. The heterogeneous processing element model puts special purpose processing elements on the same playing field as processors, from a programming perspective, operating system perspective, and power perspective. The operating system can get work to a security engine, for example, in the same way it does to a processor.
摘要:
A heterogeneous processing element model is provided where I/O devices look and act like processors. In order to be treated like a processor, an I/O processing element, or other special purpose processing element, must follow some rules and have some characteristics of a processor, such as address translation, security, interrupt handling, and exception processing, for example. The heterogeneous processing element model puts special purpose processing elements on the same playing field as processors, from a programming perspective, operating system perspective, power perspective, as the processors. The operating system can get work to a security engine, for example, in the same way it does to a processor.
摘要:
A technique for processing an instruction sequence that includes a barrier instruction, a load instruction preceding the barrier instruction, and a subsequent memory access instruction following the barrier instruction includes determining that the load instruction is resolved based upon receipt of an earliest of a good combined response for a read operation corresponding to the load instruction and data for the load instruction. The technique also includes if execution of the subsequent memory access instruction is not initiated prior to completion of the barrier instruction, initiating in response to determining the barrier instruction completed, execution of the subsequent memory access instruction. The technique further includes if execution of the subsequent memory access instruction is initiated prior to completion of the barrier instruction, discontinuing in response to determining the barrier instruction completed, tracking of the subsequent memory access instruction with respect to invalidation.
摘要:
A multiprocessor data processing system includes at least first and second coherency domains, where the first coherency domain includes a system memory and a cache memory. According to a method of data processing, a cache line is buffered in a data array of the cache memory and a state field in a cache directory of the cache memory is set to a coherency state to indicate that the cache line is valid in the data array, that the cache line is held in the cache memory non-exclusively, and that another cache in said second coherency domain may hold a copy of the cache line.
摘要:
A data processing system includes at least a first through third processing nodes coupled by an interconnect fabric. The first processing node includes a master, a plurality of snoopers capable of participating in interconnect operations, and a node interface that receives a request of the master and transmits the request of the master to the second processing unit with a nodal scope of transmission limited to the second processing node. The second processing node includes a node interface having a directory. The node interface of the second processing node permits the request to proceed with the nodal scope of transmission if the directory does not indicate that a target memory block of the request is cached other than in the second processing node and prevents the request from succeeding if the directory indicates that the target memory block of the request is cached other than in the second processing node.
摘要:
A data processing system includes an interconnect fabric, a system memory coupled to the interconnect fabric and including a virtual barrier synchronization region allocated to storage of virtual barrier synchronization registers (VBSRs), and a plurality of processing units coupled to the interconnect fabric and operable to access the virtual barrier synchronization region of the system memory. Each of the plurality of processing units includes a processor core and a cache memory including a cache array that caches VBSR lines from the virtual barrier synchronization region of the system memory and a cache controller. The cache controller, responsive to a store request from the processor core to update a particular VBSR line, performs a non-blocking update of the cache array in each other of the plurality of processing units contemporaneously holding a copy of the particular VBSR line by transmitting a VBSR update command on the interconnect fabric.