摘要:
A stand-alone graphics workstation including a digital computer host and a graphics processing subsystem is disclosed. Address data relating to the graphics subsystem components is mapped into the host system virtual memory. The application processes residing in the host are thereby able to communicate directly with the graphics subsystem components, as, e.g. the structure memory, without the need of a direct memory access hardware arrangement or device drivers.
摘要:
A method and apparatus for operating a computer graphics system to perform a conditional test on a node in a graphics data structure during the traversal of the graphics data structure by a structure walker. The graphics system is operated to manipulate data contained in a memory to define a value for an operand that is to be tested. The system accesses the operand from the memory. A structure walker performs a test on the value of the operand during traversal of the graphics data structure. Depending upon the result of the test, the structure walker traverses one of several paths in the graphics data structure to create a graphics display.
摘要:
A method for operating a computer graphics system to build custom nodes containing commands and data information that is stored in a data structure in the graphics subsystem. A host processor calls routines which build the custome nodes. A structure walker traverses the data structure and extracts the information from the data structure to pass it to the graphics subsystem for display. The use of custom nodes increases the flexibility of advanced graphics data structures bny allowing the creation of other data structures during execution of a first data structure.
摘要:
A host system executes one or more application programs which results in graphic data structures. These graphic data structures are then continuously and asynchronously traversed. Traversal requests by competing application programs are scheduled and performed so that each application views the graphics processing as its own. The traversal and ordering of traversal requests provide efficient use of resources for multiple application programs.
摘要:
Methods, systems, and apparatus, including computer program products for receiving a request for access to a first item of content stored on resources of a storage environment, the request for access being initiated by a first user, identifying an existing resource allocation arrangement associating elements of the first item of content with respective elements of the resources of the storage environment, performing an inquiry to determine whether an admission condition is satisfied, and upon satisfaction of the admission condition, generating a specification of an access operation, the access operation configured to enable a selected set of elements among the respective elements of the resources of the storage environment to be accessed.
摘要:
A storage server in a distributed content storage and access system provides a mechanism for dynamically establishing storage resources, such as buffers, with specified semantic models. For example, the semantic models support distributed control of single buffering and double buffering during a content transfer that makes use of the buffer for intermediate storage. In some examples, a method includes examining characteristics associated with a desired transfer of data, such as a unit of content, and then selecting characteristics of a first storage resource based on results of the examining. The desired transfer of the data is then affected to use the first storage resource element.
摘要:
A computer-implemented method includes detecting an actual workload representative of a pattern of access of a plurality of items of content; comparing the actual workload against a prescriptive workload to determine an occurrence of a substantial deviation from the prescriptive workload; and upon determining the occurrence of the substantial deviation, revising the prescriptive workload based at least in part on the actual workload. The plurality of items is stored on resources of a storage environment according to one of a plurality of resource allocation arrangements. The prescriptive workload including a plurality of categories, each category being associated with a respective one of the plurality of resource allocation arrangements.
摘要:
Systems, methods, and apparatus, including computer program products for receiving a content transfer request that includes a first set of provisioning attributes that characterizes one or more operational objectives of a first item of content; and processing the content transfer request to allocate resources of a storage environment to store the first item of content.
摘要:
A computer-implemented method includes obtaining information characterizing a level of actual usage of a first item of content; based on the obtained information, determining whether a re-provisioning condition is satisfied and if so, generating a specification of a re-provisioning operation to be executed in association with the resources of a storage environment; and executing the re-provisioning operation. The first item of content is stored on a first set of elements of resources of the storage environment according to a first resource allocation arrangement. The re-provisioning operation includes identifying a second resource allocation arrangement for storing the first item of content; and allocating a second set of elements of the resources of the storage environment according to the second resource allocation arrangement.
摘要:
A computer-implemented method includes obtaining information characterizing a level of actual usage of a first item of content; based on the obtained information, determining whether a re-provisioning condition is satisfied and if so, generating a specification of a re-provisioning operation to be executed in association with the resources of a storage environment; and executing the re-provisioning operation. The first item of content is stored on a first set of elements of resources of the storage environment according to a first resource allocation arrangement. The re-provisioning operation includes identifying a second resource allocation arrangement for storing the first item of content; and allocating a second set of elements of the resources of the storage environment according to the second resource allocation arrangement.