Average memory acces time

Shefali asked Aug 8, 2015

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8 votes

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amarVashishth asked Jul 8, 2015

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Average Access time in Memory Organization
Consider a Processor with two Caches which it can access directly in parallel $L_1$(80% hit rate) and $L_2$(90% hit rate) with access times as 100ns and 200ns respectively. In case of miss in any of those it fetches the data from hard disk $L_3$(100% hit rate) which has a latency of 500ns. What is the average access time($T_{avg}$) of the organization?

Consider a Processor with two Caches which it can access directly in parallel $L_1$(80% hit rate) and $L_2$(90% hit rate) with access times as 100ns and 200ns respectivel...

amarVashishth

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amarVashishth asked Jul 8, 2015

1 votes

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kirti singh asked Nov 5, 2015

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what will be the average instruction time?
If a page fault occurs on an average every 1000 instructions and average instruction time is 100ns without page fault and 100ms with page fault. what is average instruction time?

If a page fault occurs on an average every 1000 instructions and average instruction time is 100ns without page fault and 100ms with page fault. what is average instructi...

kirti singh

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kirti singh asked Nov 5, 2015

1 votes

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Shubham Sahu 1 asked Jun 3, 2015

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What is the average access time to service a page fault
In a demand paging memory system, page table is held in registers. The time taken to service a page fault is 8 m.sec. if an empty frame is available or if the replaced page is not modified, and it takes 20 m.secs., if the ... is the average access time to service a page fault assuming that the page to be replaced is modified 70% of the time ?

In a demand paging memory system, page table is held in registers. The time taken to service a page fault is 8 m.sec. if an empty frame is available or if the replaced pa...

Shubham Sahu 1

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Shubham Sahu 1 asked Jun 3, 2015

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Hardik Vagadia asked Jan 3, 2019

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Effective memory access time
Suppose: TLB lookup time = 20 ns TLB hit ratio = 80% Memory access time = 75 ns Swap page time = 500,000 ns 50% of pages are dirty OS uses a single level page table What is the effective access time (EAT) if we assume the page fault rate is 10%? Assume the cost toupdate the TLB, the page table, and the frame table (if needed) is negligible.

Suppose: TLB lookup time = 20 nsTLB hit ratio = 80%Memory access time = 75 nsSwap page time = 500,000 ns50% of pages are dirtyOS uses a single level page tableWhat is the...

Hardik Vagadia

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Hardik Vagadia asked Jan 3, 2019

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Average memory acces time

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