Answered: The effective access time in a virtual…

The effective access time in a virtual memory system depends on the TLB hit rate but does not depend on whether the page table contains a valid translation for the page. O True False

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter11: Operating Systems

Section: Chapter Questions

Problem 26VE

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Concept explainers

Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.

Question

The effective access time in a virtual memory system depends on the TLB hit
rate but does not depend on whether the page table contains a valid
translation for the page.
O True
O False

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228. In virtual memory by giving the page reference a process can a. Stop b. Execute c. Control d. Terminate
What is Translation Look-Aside Buffer used in paging? answer a)It is a memory that is searched when a page is not found in page table b)It is part of the physical memory to hold process control blocks c)It is a bank of special registers inside the processor d)It is an associative memory that can do parallel frame search in hardware
A virtual memory has a page size of 2K(words). There are eight pagesand four blocks. The associative memory page table contains the followingentries:Page Block0 32 15 26 0Make a list of all virtual addresses (In decimal) that will cause a page fault if used by the CPU.
A computer has a 32-bit virtual address space and 1024 byte pages. A page table entry takes 4 bytes. A multilevel page table is used because each table must be contained within a page. How many levels are required?
If a CPU makes a cache-unfulfilled request while a block is being flushed from the write buffer back to main memory, should something happen?
instruction is in the first picture cacheSim.h #include<stdlib.h>#include<stdio.h>#define DRAM_SIZE 1048576typedef struct cb_struct {unsigned char data[16]; // One cache block is 16 bytes.u_int32_t tag;u_int32_t timeStamp; /// This is used to determine what to evict. You can update the timestamp using cycles.}cacheBlock;typedef struct access {int readWrite; // 0 for read, 1 for writeu_int32_t address;u_int32_t data; // If this is a read access, value here is 0}cacheAccess;// This is our dummy DRAM. You can initialize this in anyway you want to test.unsigned char * DRAM;cacheBlock L1_cache[2][2]; // Our 2-way, 64 byte cachecacheBlock L2_cache[4][4]; // Our 4-way, 256 byte cache// Trace points to a series of cache accesses.FILE *trace;long cycles;void init_DRAM();// This function print the content of the cache in the following format for an N-way cache with M Sets// Set 0 : CB1 | CB2 | CB 3 | ... | CB N// Set 1 : CB1 | CB2 | CB 3 | ... | CB N// ...// Set M-1 : CB1 | CB2 | CB…
What happens when a translation look-aside buffer (TLB) does not support address-space identifiers (ASIDs)? A. The TLB must be flushed every time a new page table is selected. B. The TLB can contain entries for several processes simultaneously. C. The TLB will have address-space protection for each process. D. The TLB will have unique identifier for each process.
Below you see a sequence of events to handle a page fault. Order the steps (1 to 5) to present the correct sequence for handling a page fault. -Read the page in the frame -Execute the instruction that caused the page fault again. (Restart the instruction that caused the page fault) -Find an empty frame. -Find page on disk -Set the valid bit to 1
Which one is not true about translation lookaside buffer? A Structured as fully associative cache B Generally accessed in more than 1 cycle C Stores the recent translations of virtual memory to physical memory D A memory cache E Address translation cache
Select all true statements. Paging systems without inverted page tables retain at least one page table per process. System-wide frame table data. The page size specified for paging defines which portion of a virtual address is the page number and which is the offset. Page and frame sizes may vary. The TLB is a system-wide page directory. Paging fragments internally.