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

METHOD AND APPARATUS FOR LOWERING BANDWIDTH AND POWER IN A CACHE USING READ WITH INVALIDATE
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.
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