假定一个计算机系统中有一个TLB和一个L1 data cache。该系统按字节编址,虚拟地址16位,物理地址12位;页大小为128B,TLB为四路组相联,共有16个页表项;L1 data cache采用直接映射方式,块大小为4B,共16行。在系统运行到某一时刻时,TLB、页表和L1 data cache中的部分内容(用十六进制表示)如下: 虚拟地址中哪几位表示虚拟页号?哪几位表示页内偏移量?虚拟页号中哪几位表示TLB标记?哪几位表示TLB索引?
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