Recent questions tagged translation-lookaside-buffer

A system uses:$4$ KB pages A $4$-entry fully associative TLB LRU replacement $$ \textbf{Initial TLB:} $$$$\begin{array}{|c|c|c|c|}\hline\text{Valid} & \text{VPN} & \text{...

A machine uses a two-level page table. The page-directory base address is held in a register.Assume:One physical-memory access takes $100$ ns Page directories and page ta...

A machine has:$64$-bit virtual addresses $8$ KB pages $4$ GB physical memory $512$ TLB entries An inverted page table with one entry per physical frame Each inverted page...

A paged virtual-memory system has the following measured parameters:\[\begin{array}{|l|l|}\hline\textbf{Measurement} & \textbf{Value} \\\hlineP_t = \text{probability of a...

Consider a system using a two-level page table. Assume the required page is present in physical memory.How many main-memory accesses are required for a virtual-address ac...

What caching is done in the TLB?Virtual Address $\rightarrow$ Physical Address Virtual Page Number $\rightarrow$ Physical Address Virtual Page Number $\rightarrow$ Physic...

Consider a three level paging scheme with a TLB. Assume no page fault occurs. It takes $1 ~\text{ns}$ to search the TLB and $100 ~\text{ns}$ to access the physical memory...

A system has a Translation Lookaside Buffer (TLB) that has a reach of $1$ MB. TLB reach is defined as the total amount of physical memory that can be accessed through the...

A) 147 nsB) 130 nsC) 129 nsD) 124 ns

Consider a paging system that uses 3-level page table residing in main memory and a TLB for address translation. Each main memory access takes 150 ns and TLB lookup takes...

Given a machine with 33-bit virtual addresses and a page size of 32 KB (32768 bytes), the TLB contains the following entries (in octal):Virtual Page NumPhysical Frame Num...

Consider a k-level paging system along with a TLB. A TLB takes 10ns, and a memory takes 100ns on average. The hit ratio of TLB is equal to 0.8. If it is known that the av...

Assume that in a certain computer, the virtual addresses are $64$-bit long, the physical addresses are $48$-bit long, and the memory is word-addressable. The page size is...

Which one of the following statements is $\text{FALSE}?$The $\text{TLB}$ performs an associative search in parallel on all its valid entries using page number of incoming...

A computer system has a page size of 1024 bytes and maintains the page table for each process in main memory. The overhead required for doing a lookup in the page table i...

Given a byte addressable system which implements demand paging, a TLB has 64 entries and the frame size is 4KB. The LAS is 4MB. TLB has a hit ratio of 90% and has an acce...

Suppose: TLB lookup time = 20 nsTLB hit ratio = 80%Memory access time = 75 nsPFST = 500,000 ns50% of the pages are dirtyOS uses a single level page tableWhat is the appro...

Consider a single-level page table system, with the page table stored in the memory. If the hit rate to TLB is $80\%$, and it takes $15$ nanoseconds to search the $TLB$, ...

A CPU generates $32$-bit virtual addresses. The page size is $4$ KB. The processor has a Translation Look-aside Buffer (TLB) which can hold a total of $128$ page table en...