我们可以优化代码以降低功耗吗？

Question

有没有什么技术可以优化代码以确保更低的功耗。架构是ARM。语言是C

Answer 1

来自 ARM 技术引用站点:

The features of the ARM11 MPCore processor that improve energy efficiency include:

• accurate branch and sub-routine return prediction, reducing the number of incorrect instruction fetch and decode operations
• use of physically addressed caches, which reduces the number of cache flushes and refills, saving energy in the system
• the use of MicroTLBs reduces the power consumed in translation and protection lookups each cycle
• the caches use sequential access information to reduce the number of accesses to the tag RAMs and to unwanted data RAMs.

In the ARM11 MPCore processor extensive use is also made of gated clocks and gates to disable inputs to unused functional blocks. Only the logic actively in use to perform a calculation consumes any dynamic power.

根据这些信息，我会说处理器为您做了很多工作以节省电量。任何功率浪费都可能来自编写糟糕的代码，这些代码执行的处理比必要的多，无论如何你都不希望这样。如果您希望节省电能，应用程序的整体设计将发挥更大的作用。网络访问、屏幕渲染等高耗电操作将更加关注功耗。