Invention Application
US20150293847A1 METHOD AND APPARATUS FOR LOWERING BANDWIDTH AND POWER IN A CACHE USING READ WITH INVALIDATE
审中-公开
降低带宽和功率的方法和设备使用读取无效的缓存
- Patent Title: METHOD AND APPARATUS FOR LOWERING BANDWIDTH AND POWER IN A CACHE USING READ WITH INVALIDATE
- Patent Title (中): 降低带宽和功率的方法和设备使用读取无效的缓存
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Application No.: US14251628Application Date: 2014-04-13
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Publication No.: US20150293847A1Publication Date: 2015-10-15
- Inventor: George PATSILARAS , Moinul H. KHAN , Pankaj CHAURASIA , Bohuslav RYCHLIK , Feng WANG , Anwar Q. ROHILLAH , Subbarao PALACHARLA
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/12
Abstract:
Ephemeral data stored in a cache is read when needed but is not written to system memory so as to save power and bandwidth. In an embodiment, a no-writeback bit associated with the ephemeral data is set in response to a read-no-writeback instruction. Data in a cache line for which its no-writeback bit has been set is not written back into system memory. Accordingly, when evicting cache lines, if a cache line has a no-writeback bit set, then the data in that cache line is discarded without being written back to system memory.
Information query
