请教CS的一道题

十指飞舞UID: 2228487

A computer 有如下特征,virtual paging ,TLB,physical address cache,对此computer的性能进行评价：
缺页的次数比TCB（translation laookaside buffer）缺页的少（不全）
a,page fault 比cache mising 少
b.paging fault 比TLB missing 少
谁能解释一下 TCB（translation laookaside buffer）呢，谢谢！

fingerdancerUID: 171704

The TLB references physical memory addresses in its table. The TLB may reside between the CPU and the cache, or between the cache and primary storage memory. This depends on whether the cache is using virtual addressing or physical addressing.

If the cache is virtually addressed, requests are sent directly from the CPU to the cache, which then accesses the TLB as necessary. If the cache is physically addressed, the CPU does a TLB lookup on every memory operation, and the resulting physical address is sent to the cache. There are pros and cons to both implementations.

guide_325UID: 2237915

。。。。。

yt_MayUID: 209423

应该是TLB吧。简单地说，cache是缓存数据和指令的，TLB是缓存数据和指令所在的页表项的。

十指飞舞UID: 2228487

非常感谢各位的指点！