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Picture 018 - gement first request le memory ‘memory...

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Unformatted text preview: gement first request le memory? ,. ‘memory is 'to external is of virtual bl address? r is of virtual {9 frame? is of virtual lcal address a of virtual :page table s of virtual ire an entry ty contains ref 16 bits any bits in i I Pf 16 bits ray bits in 1 CHAPTER 4 Memory" Management 4.62 4.63 4.64 4.65 4.66 4.67 4.68 4.69 4.70 4.71 On a simple paging system with a page table containing 512 entries of 16 hits (including valid/invalid hit) each, and a page size of 1024 bytes, how many hits are in a logical address? On a simple paging system with a page table containing 512 entries of 16 bits (including valid/invalid hit) each, and a page size of 1024 bytes, what is the size of the logical address space? On a simple paging system with a page table containing 512 entries of 16 hits (including valid/invalid bit) each, and a page size of 1024 bytes, how many bits in the physical address specify the page fiarne number? 011 a simple paging system with a page table containing 512 entries of 16 hits (including valid/invalid hit) each, and a page size of 1024 bytes, how many hits in the physical address specify the offset within the page frame? On a simple paging system with a page table containing 512 entries of 16 bits (including valid/invalid hit) each. and a page size of 1024 bytes, how many bits are in a physical address? On a simple paging system with a page table containing 512 entries of 16 bits (including valid] invalid hit) each, and a page size of 1024 bytes, what is the size of the physical address space? A system that uses a two—level page table has 32~bit virtual addresses. The first 8 bits of the address serve as the index into the first-level page table, and the next 10 bits specify the level-Mo page table entry. (a) How many bytes in a page? (12) How many entries in a level-one page table? (c) How many entries in a level-two page table? (d) How many pages in the virtual address space? A computer has a 64-bit virtual address space and 2048-byte pages. A page table entry takes 4 bytes. A multilevel page table is used because each table must be contained with a page. How many levels are required? 011 a simple paged system, associative registers hold the most active page entries, and the full page table is stored in main memory. If references satisfied by the associative registers take 60 ns and references through the main memory page table take 200 us. what is the effective access time if 40% of all memory references find their entries in the associative registers? On a simple paged system1 associative registers hold the most active page entires, and the full page table is stored in main memory. lfreference satisfied by the associative registers take 90 ns and references through the main memory page table take 190 us, what must the hit ratio be to achieve an effective access time of 120 ns'? ..Jm'.. ——@ ...
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