摘要:
Data in a cache is selectively compressed based on predictions as to whether the benefit of compression in reducing cache misses exceeds the cost of decompressing the compressed data. The prediction is based on an assessment of actual costs and benefits for previous instruction cycles of the same program providing dynamic and concurrent adjustment of compression to maximize the benefits of compression in a variety of applications.
摘要:
A method and device for virtual memory support in a computer system using a mapping structure for address translation. Mapping indicators are associated with each process context and each mapping structure entry. When a context is demapped the mapping indicator associated with the context is changed and the mapping indicator in each mapping structure entry is employed to immediately invalidate further memory accesses for that context.
摘要:
A server system on a network such as the World Wide Web aggregates and stores information about the content of Web pages served by a server on a network. A server process receives one or more requests for Web pages from requesters connected to the network. Upon receiving the request, the server produces a requested Web page and serves the Web page to the requester. The Web pages have with one or more content elements in addition to one or more metadata entries. The metadata entries are associated with the content elements of the respective Web page produced. The system also creates and maintains a log having a plurality of records. Each record has requester fields and metadata fields. A logger process stores the metadata entries contained in each of the Web pages in one or more of the metadata fields, and stores a requester identification, associated with the requester, in the requester field of the record associated with the respective Web page.
摘要:
An apparatus for facilitating the sharing of memory blocks, which has local physical addresses at a computer node, between the computer node and an external device. The apparatus includes snooping logic configured for coupling with a common bus of the computer node. The snooping logic is configured to monitor, when coupled to the common bus, memory access requests on the common bus. There is also included a snoop tag array coupled to the snooping logic. The snoop tag array includes tags for tracking all copies of a first plurality of memory blocks of the memory blocks cached by the external device. Further, there is included a protocol transformer logic coupled to the snooping logic for enabling the apparatus, when coupled to the external device, to communicate with the external device using a protocol suitable for communicating with the external device.
摘要:
A coherence transformer for allowing a computer node and one or more external devices to share memory blocks having local physical addresses at a memory module of the computer node. The coherence transformer includes logic for ascertaining whether a memory access request from the external device for a memory block should be responded to using a snoop-only approach or an Mtag-only approach. The snoop-only approach requires a tag in a snoop tag array of the coherence transformer be available to track the memory block for an entire duration that the memory block is cached by the external device. The Mtag-only approach only temporarily stores the memory block until a global state associated with the memory block can be written back into the memory module of the computer node. The snoop tag array allows the coherence transformer to snoop the bus of the computer node to intervene and respond to memory access requests pertaining to a memory block externally cached and tracked by the snoop tag array.
摘要:
A controlled release device which comprises:(i) a hydrogel; and incorporated therewith(ii) an active substance,at least part of at least one surface of the device comprising(iii) a layer which is impermeable to aqueous media.
摘要:
A method and system for enhancing the execution performance of program code. An analysis of the program code is used to generate code usage information for each code module. For each module, the code usage information is used to determine whether the code module should be separated from its original module container. If so, the code module is migrated to a new module container, and the code module in the original module container is replaced with a reference to the code module in the new module container.
摘要:
A mechanism and method for maintaining cache consistency in computer systems that implements synchronized broadcasts using skew control and queuing. An access right corresponding to a given block allocated in a first active device may be configured to transition in response to a corresponding data packet being received through a data network. Additionally, transitions in ownership of the given block may occur at a different time than the time at which the access right to the given block is changed. To implement synchronized broadcasts, the address and data networks are configured such that a maximum amount of time from when a given broadcast packet conveyed on the address network arrives at a first active device to a time when the given broadcast packet arrives at a second active device is less than or equal to a minimum amount of time from when a data packet sent on the data network from the first active device arrives at the second active device. Each of the active devices may further comprise a queue control circuit coupled to an address-in queue and a data-in queue. The queue control circuit may be configured to prevent processing of a particular data packet that arrived in the data-in queue until all address packets that arrived earlier in the address-in queue are processed.