The goal of -prefetch insertion is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache. The prefetching optimizations implement the following options:
|
-prefetch[-] |
Enable or disable (-prefetch-) prefetch insertion. This option requires that -O3 be specified. The default with -O3 is -prefetch. |
To facilitate compiler optimization:
Minimize use of global variables and pointers.
Minimize use of complex control flow.
Use the const modifier, avoid register modifier.
Choose data types carefully and avoid type casting.
For more
inpoframtion on how to optimize with -prefetch[-],
refer to Intel