Assume we have 1 GB of physical memory. Inverted page table is used. Page size is 16 KB. Each entry in the inverted table is 16 bytes. What is the RAM space needed for storing the inverted table?
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Assume we have 1 GB of physical memory. Inverted page table is used. Page size is 16 KB. Each entry in the inverted table is 16 bytes. What is the RAM space needed for storing the inverted table?
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- assume we have 1 GB of physical memory. Inverted page table is used. Page size is 16 KB. Each entry in the inverted table is 16bytes. What is the RAM space needed for storing the inverted table?. Suppose we have 2 bytes of virtual memory and 28 bytes of physical main memory. Suppose the page size is 24 bytes.Q.) How many pages are there in virtual memory?Assume a 32-bit virtual address and 4 MBs of memory (i.e., DRAM). If the page size is 1 KB, then what is the size of the page table (ignoring any permission or other overhead bits)?
- . Suppose we have 2 bytes of virtual memory and 28 bytes of physical main memory. Suppose the page size is 24 bytes.Q.) How many page frames are there in main memory?Suppose that a machine has 42-bit virtual addresses and 32-bit physical addresses.{a} How much RAM can the machine support (each byte of RAM must be addressable)?{b} What is the largest virtual address space that can be supported for a process?{c} If pages are 2 KB, how many entries must be in a single-level page table?{d} If pages are 2 KB and we have a two-level page table where the first level is indexed by 15-bits, then how many entries does the first-level page table have?{e} With the same setup as part {d}, how many entries are in each second-level page table?{f} What is the advantage of using a two-level page table over single-level page table?Suppose we have 210 bytes of virtual memory and 28 bytes of physical main memory. Suppose the page size is 24 bytes. a) How many pages are there in virtual memory? b) How many page frames are there in main memory? c) How many entries are in the page table for a process that uses all of virtual memory?
- If a program has 471 bytes and will be loaded into page frames of 126 bytes each, assuming the job begins loading at the first page (Page 0) in memory, and the instruction to be used is at byte 132, answer the following questions: a. How many pages are needed to store the entire job? b. Compute the page number and exact displacement for each of the byte addresses where the desired data is stored.What is the difference between a TLB, a page table, and a cache in a limited memory system?Consider a virtual memory split into pages. If each byte in the virtual memory has a virtual address, and the last 8 bits of each virtual address give the offset within a page. How big is each page?
- On a simple paging system with 224 bytes of physical memory, 256 pages of logical address space, and a page size of 210 bytes. 1. How many bits are needed to store an entry in the page table (how wide is the page table)? Assume a valid/invalid 1-bit is included in each entry. 2. If the page table is stored in the main memory with 250nsec access time, how long does a paged memory reference take? 3. If the page table is implemented using associative registers that takes 95nsec. and main memory that takes 200nsec, what is the total access time if 75% of all memory references find their entries in the associative registers?Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. Could you hand draw the page table, if possible a) Suppose that the OS uses a two-level page table. Draw the page table. (Assume that frames 7 through 221 are free, so you can allocate space for the page table there.) In addition, suppose that the page-table directory storage comprises a whole number of consecutive full frames. (For examples: if the directory entry is 2 bytes, the entry’s storage comprises 1 frame; if the directory entry is 260 bytes, the entry’s storage comprises 2 consecutive frames.) b) What is the size of the two-level page tableConsider a logical address space of 256 pages with a 4-KB page size, mapped onto a physical memory of 64 frames. a. How many bits are required in the logical address? b. How many bits are required in the physical address?