Consider a paging system with the page table stored in associative registers. If a memory reference takes 200 ns (nano seconds), and it takes 20 ns to access the associative registers. What is the effective memory access time if hit ration to the associative registers is 60%? Show your work
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- I am trying to better understand memory access in computers, please answer the sample question below. Assume that the page table can held in registers of the MMU. It takes 8 ms (milliseconds)to service a page fault if there is an empty frame or if the replaced page is not altered, and20 ms if the replaced page is altered. Memory access time is 100 ns (nanoseconds). It has been empirically measured that the page to be replaced is altered 75% of the time.Obtain the maximum probability of page fault for an effective memory access time ≤ 200ns.Consider a paging system with the page table stored in memory. A. If a memory reference takes 200 nanoseconds, how long does a paged memory reference take? B. If we add associative registers, and 75 percent of all page-table references are found in the associative registers, what is the effective memory reference time? (Assume that finding a page-table entry in the associative registers takes zero time, if the entry is there.)(b) Consider a paging system with the page table stored in memory. If a memory referencetakes 200 nano seconds, how long does a paged memory reference take? If we add a TLB,and 75% of all page references are found in the TLB, what is the effective memory referencetime? (Assume that it takes zero time to find an entry in the TLB if it is already present).
- Recently, a computer system was designed by Adam. He considered a paging system assured with a page table stored up in the memory. It was observed that when he used the associative registers, the references made to page tables were around 80 percent. During the whole process, the memory reference taken was about 150 ns. Adam was not sure what was the time taken for paged memory reference. Your task is to help Adam to compute the time for paged memory reference and the time taken for effective memory reference.Consider a paging system with the page table stored in memory. a. If a memory reference takes 50 nanoseconds, how long does a paged memory reference take? b. If we add TLBS, and if 75 percent of all page-table references are found in the TLBS, what is the effective memory reference time? (Assume that finding a page-table entry in the TLBS takes 2 nanoseconds, if the entry is present.A microprocessor scans the status of an output I/O device every 20 ms. This is accom- plished by means of a timer alerting the processor every 20 ms. The interface of the device includes two ports: one for status and one for data output. How long does it take to scan and service the device given a clocking rate of 8 MHz? Assume for sim- plicity that all pertinent instruction cycles take 12 clock cycles.
- in 8 bit computer system paging is used. how many different virtual memory addresses total? if there are 64 memory address in frame, and page number needs p bits, what is value of p?In a dynamic random access memory (DRAM) computer chip, each memory cell chiefly consists of a capacitor for charge storage. Each of these cells represents a single binary-bit value of 1 when its 35-fFfcapacitor (1fF=10^−15F) is charged at 1.5 V, or 0 when uncharged at 0 V. A)When it is fully charged, how many excess electrons are on a cell capacitor's negative plate? B) After charge has been placed on a cell capacitor's plate, it slowly "leaks" off (through a variety of mechanisms) at a constant rate of 0.30 fC/s. How long does it take for the potential difference across this capacitor to decrease by 1.0% from its fully charged value? (Because of this leakage effect, the charge on a DRAM capacitor is "refreshed" many times per second.) Express your answer to two significant figures and include the appropriate units.3. If we have an 8 bit microcontroller that has 4kB of instruction memory starting at address 0x0000, and 2kB of data memory immediately above that, what is the next available byte in our address map?
- Consider a paging system with the page table stored in memory.a. If a memory reference takes 400 nanoseconds, how long does a paged memoryreference take?b. If we add TLBs, and 95 percent of all page-table references are found in the TLBs,what is the effective memory reference time? (Assume that finding a page-table entry inthe TLBs takes zero time, if the entry is there.)A modern computer central processing unit chip (CPU) runs with a clock speed of 2.7 GHz. It can execute one operation in each of these clock cycles. a. How many seconds long is one clock cycle? b. Electrical signals travel at the speed of light. How far can an electrical signal travel in one clock cycle? c. Wires between the CPU's control unit and its cache memory (both on this chip), are about 2 cm long. How does this compare to how far an electrical signal can travel in one clock cycle?With drawing Compute the Average access time for memory system when the time for Main Memory is 2000 ns, the time for cache is 200 ns and hit ratio is 0.9?