Recovering from data errors using implicit redundancy

摘要

Some implementations disclosed herein provide techniques and arrangements for recovery of data stored in memory shared by a number of processors through information stored in a cache directory. A core of a processor may initiate access (e.g., read or write) to particular data located in a first cache that is accessible to the core. In response to detecting an error associated with accessing the particular data, a location in the processor that includes the particular data may be identified and the particular data may be copied from the location to the first cache.

主权项

1. A processor comprising:
a plurality of cores including a first core and a second core; a cache directory to store information indicating whether particular data is stored in one or more caches that are shared by the plurality of cores, the cache directory to include a directory entry structure associated with an entry in the cache directory, the directory entry structure to include a first field to indicate when the first core has copied the particular data to modify the particular data in a cache local to the first core and a second field to indicate whether a copy of the particular data in a shared memory has been modified.