It degenerates to control and degenerate and controls program

摘要

Reliability is that maintenance computer system can be by excluding potential factor (for example, correctable error) in advance, the cache memory that performance that is of serious failure while preventing processing capacity can be invited to deteriorate. Degeneration control such as incremental error counter first provides the method for error to count respectively. If the counting is being more than predetermined upper limit number by error count, the cache tag for control write-in mark (it is to degenerate that degradation information, which represents that cache line) of degenerating, for cache line (such as, mode is as follows: n, index: m) causing mistake, these countings is caused to reach the upper limit number.