发明授权
US06490658B1 Data prefetch technique using prefetch cache, micro-TLB, and history file 失效
使用预取缓存,微型TLB和历史文件的数据预取技术

  • 专利标题: Data prefetch technique using prefetch cache, micro-TLB, and history file
  • 专利标题(中): 使用预取缓存,微型TLB和历史文件的数据预取技术
  • 申请号: US08881013
    申请日: 1997-06-23
  • 公开(公告)号: US06490658B1
    公开(公告)日: 2002-12-03
  • 发明人: Sultan AhmedJoseph Chamdani
  • 申请人: Sultan AhmedJoseph Chamdani
  • 主分类号: G06F1206
  • IPC分类号: G06F1206
Data prefetch technique using prefetch cache, micro-TLB, and history file
摘要:
A memory cache method and apparatus with two memory execution pipelines, each having a translation lookaside buffer (TLB). Memory instructions are executed in the first pipeline (324) by searching a data cache (310) and a prefetch cache (320). A large data TLB (330) provides memory for storing address translations for the first pipeline (324) A second pipeline (328) executes memory instructions by accessing the prefetch cache (320). A second micro-TLB (340) is associated with the second pipeline (328). It is loaded in anticipation of data that will be referenced by the second pipeline (328). A history file (360) is also provided to retain information on previous instructions to aid in deciding when to prefetch data. Prefetch logic (370) determines when to prefetch data, and steering logic (380) routes certain instructions to the second pipeline (328) to increase system performance.
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