Prefetch instruction to begin the process of bringing the data into cache. If the kernel knows that it will be accessing memoryĪt a particular location in the near future, it can use a CPU-specific Have helped performance in measurable ways.Ĭache misses are often unavoidable, but it is sometimes possible to attempt Reordering structures so that fields that are commonly accessed togetherĪre found in the same cache line. Possible there has also been some significant work put into tasks like The kernel goes out of its way to use cache-hot memory when ![]() Slow good performance requires that needed data be in a CPU cache much of Memory references which must actually be satisfied by memory are extremely That is a lesson that the kernel developers have justĪt the kernel level, performance often comes down to cache behavior. ![]() ![]() Them go faster can be entirely ineffective. Where we think they are, so undirected attempts to tweak things to make Over time, software developers tend to learn that micro-optimizationĮfforts are generally not worthwhile, especially in the absence of hardĭata pointing out a specific problem.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |