• Memory 内存知识-25-NUMA
  NUMA Support In section 2 we saw that, on some machines, the cost of access to specific regions of physical memory differs depending on where the access originated. This type of hardware requires...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-24-虚拟内存
  Virtual Memory The virtual memory (VM) subsystem of a processor implements the virtual address spaces provided to each process. This makes each process think it is alone in the system. ps: 让每一个进...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-23-影响缓存命中的因素之FSB
  FSB Influence The FSB plays a central role in the performance of the machine. Cache content can only be stored and loaded as quickly as the connection to the memory allows. We can show how much ...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-22-影响缓存命中的因素之缓存替换
  Cache Placement Where the caches are placed in relationship to the hyperthreads（超级线程）, cores, and processors is not under control of the programmer. But programmers can determine（确认） where the th...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-21-影响缓存命中的因素之关键词加载
  Critical Word Load（关键词加载） Memory is transferred from the main memory into the caches in blocks which are smaller than the cache line size. Today 64 bits are transferred at once and the cache line...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-20-影响缓存命中的因素
  Cache Miss Factors We have already seen that when memory accesses miss the caches the costs skyrocket（飞涨）. Sometimes this is not avoidable and it is important to understand the actual costs and w...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-19-指令缓存
  Instruction Cache Not just the data used by the processor is cached; the instructions executed by the processor are also cached. However, this cache is much less problematic（问题） than the data ca...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-18-缓存实现的细节之其他
  Other Details So far we talked about the address as consisting of threeparts, tag, set index, and cache line offset. But what address is actually used? All relevant processors today provide virtu...
  2019-05-10 03:08:59 | Memory