what is a virtual address space? Explain vm as a tool for caching, memory management and...
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what is a virtual address space? Explain vm as a tool for
caching, memory management and...
17. A computer system implements a paged virtual memory system. Assume a 16-bit virtual address space...
17. A computer system implements a paged virtual memory system. Assume a 16-bit virtual address space and a 24-bit physical address space. Assume that the first 6 bits of a virtual address index the page table and the rest of the bits are the page offset. A process has the following indexed page table. Index Page Table Entry (PTE) 0x3800 0x3600 0x3200 0x1000 2 3 Each page table entry qives a hexadecimal page frame addresses. Translate the following two hexadecimal...
11. In a paged virtual memory system, can the computer 's physical memory address space be...
11. In a paged virtual memory system, can the computer 's physical memory address space be larger than a process's virtual memory address space? Explain your answer. (Note: A computer 's "physical memory address space" is the number of bits for the frame number plus the number of bits foir the offset. A process's "virtual memory address space" is the number of bits for a page number plus the number of bits for the offset.)
Consider a virtual memory system with the following properties: 36 bit virtual byte address, 8 KB...
Consider a virtual memory system with the following properties: 36 bit virtual byte address, 8 KB pages size, and 32 bit physical byte address. Please explain how you determined your answer. a. What is the size of main memory for this system if all addressable frames are used? b. What is the total size of the page table for each process on this processor, assuming that the valid, protection, dirty, and use bits take a total of 4 bits and...
Given a virtual memory configuration with: • 4 TB virtual memory space • 32 GB physical...
Given a virtual memory configuration with: • 4 TB virtual memory space • 32 GB physical memory space • 16 KB page size How many bits are needed for the virtual address? Choose... How many bits are needed for the physical address? Choose... How many bits in the address correspond to page offset bits? Choose... - How many bits will the virtual page number (VPN) be? Choose... - How many bits will the physical page number (PPN) be? Choose... →...
Virtual memory address translation: a) Consider a machine with a physical memory of 8 GB, a...
Virtual memory address translation: a) Consider a machine with a physical memory of 8 GB, a page size of 4 KB, and a page table entry size of 4 bytes. How many levels of page tables would be required to map a 52-bit virtual address space if every page table fits into a single page? b) Without a cache or TLB, how many memory operations are required to read or write a page in physical memory? c) How much physical...
3. Virtual Memory (20 points) An ISA supports an 8 bit, byte-addressable virtual address space. The...
3. Virtual Memory (20 points) An ISA supports an 8 bit, byte-addressable virtual address space. The corresponding physical memory has only 256 bytes. Each page contains 32 bytes. A simple, one-level translation scheme is used and the page table resides in physical memory. The initial contents of the frames of physical memory are shown below. VALUE address size 8 bit byte addressable each byte of addressing type memory has its own address 32 B page size physical memory size 256...
Programs must share the main memory, but each program has its own private virtual address space....
Programs must share the main memory, but each program has its own private virtual address space. True False
For the efficient memory management and to avoid errors modern systems uses secondary memory as a...
For the efficient memory management and to avoid errors modern systems uses secondary memory as a part of the main memory known as a virtual memory. When a computer system is running serval programs at the same time, the main memory often becomes exhausted. In such circumstances instead of closing some programs the operating system use the secondary memory as part of the main memory to store some data. In short virtual memory is an elegant interaction of hardware exceptions,...
A certain computer provides its users with a virtual memory space of 2^32 bytes. The computer...
A certain computer provides its users with a virtual memory space of 2^32 bytes. The computer has 2^18 bytes of physical memory. The virtual memory is implemented by paging, and the page size is 4,096 bytes. A user process generates the virtual address 11123456 hexadecimal. a. How many entries are there in the page table? b. Explain how the system establishes the corresponding physical location.
Consider a virtual memory system with a 16-bit virtual address, a 10-bit physical address, and a...
Consider a virtual memory system with a 16-bit virtual address, a 10-bit physical address, and a 64-byte page size. The virtual address, 0x1235, is translated into a physical address using the page table below. VPN PPN Valid 44 02 1 45 05 1 46 08 0 47 --- 0 48 03 1 49 0A 1 4A --- 0 1. What is the hex VPN? (Enter as digits without 0x.) 2. What is the hex VPO? (Enter as digits without 0x.)...
17. A computer system implements a paged virtual memory system. Assume a 16-bit virtual address space and a 24-bit physical address space. Assume that the first 6 bits of a virtual address index the page table and the rest of the bits are the page offset. A process has the following indexed page table. Index Page Table Entry (PTE) 0x3800 0x3600 0x3200 0x1000 2 3 Each page table entry qives a hexadecimal page frame addresses. Translate the following two hexadecimal...
11. In a paged virtual memory system, can the computer 's physical memory address space be larger than a process's virtual memory address space? Explain your answer. (Note: A computer 's "physical memory address space" is the number of bits for the frame number plus the number of bits foir the offset. A process's "virtual memory address space" is the number of bits for a page number plus the number of bits for the offset.)
Given a virtual memory configuration with: • 4 TB virtual memory space • 32 GB physical memory space • 16 KB page size How many bits are needed for the virtual address? Choose... How many bits are needed for the physical address? Choose... How many bits in the address correspond to page offset bits? Choose... - How many bits will the virtual page number (VPN) be? Choose... - How many bits will the physical page number (PPN) be? Choose... →...
3. Virtual Memory (20 points) An ISA supports an 8 bit, byte-addressable virtual address space. The corresponding physical memory has only 256 bytes. Each page contains 32 bytes. A simple, one-level translation scheme is used and the page table resides in physical memory. The initial contents of the frames of physical memory are shown below. VALUE address size 8 bit byte addressable each byte of addressing type memory has its own address 32 B page size physical memory size 256...
Programs must share the main memory, but each program has its own private virtual address space. True False
For the efficient memory management and to avoid errors modern systems uses secondary memory as a part of the main memory known as a virtual memory. When a computer system is running serval programs at the same time, the main memory often becomes exhausted. In such circumstances instead of closing some programs the operating system use the secondary memory as part of the main memory to store some data. In short virtual memory is an elegant interaction of hardware exceptions,...
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