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1answer
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How to compute the effective access time in Virtual Memory system with demand paging?
Given the following exercise from Operating System Concepts Essentials 1st Edition, Chapter 8 Virtual Memory:
An operating system supports a paged virtual memory, using a central
processor with ...
1
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2answers
58 views
Given the logical address, how to extract the page number?
I am studying Computer Systems. I have th following question and its answer:
Given the logical address 0xAEF9 (in hexadecimal) with a page size of
256 bytes, what is the page number?
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3
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1answer
64 views
Look Ahead buffer vs Translation Look aside buffer
I know that Translation look aside buffer is used for address translation in paging to achieve better performance.
I came across term called Look Ahead buffer in a document which said it implements ...
1
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1answer
119 views
clarification about Algorithm of page replacement LRU with reference bits
Studying LRU approximation Algorithms I think to have not understand how it works, for example:
...
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2answers
661 views
Calculation of effective average instruction execution time in a 2-level paging system
System has a two level paging scheme
Average CPU time for a instruction = 100ns
Average number of memory accesses per instruction = 2
Regular memory access = 150 ns
Page fault service ...
1
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2answers
274 views
How does increasing the page size affect the number of page faults?
If we let the physical memory size remain constant,
What effect does the size of the page have on the number of frames?
What effect does the number of frames have on the number of page faults?
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3
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1answer
127 views
Program compilation and execution flow
I was studying operating system concepts from Silberschatz, Galvin and Gagne's book (sixth edition) and I have some questions about the flow of execution of a program. A figure explains the processing ...
7
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1answer
946 views
Swap space management during pure demand paging
The following is a doubt that I came across while doing a OS home assignment - however, it seems more concept-based than a straightforward coding question, so IMHO I don't think the homework tag is ...
6
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1answer
743 views
How to interpret “Windows - Virtual Memory minimum too low” from a CS student point of view?
On my old 256MB RAM, pc I get this message. (I guess it is quite common)
Windows - Virtual Memory minimum too low
Your system is low on virtual memory. Windows is increasing the size of your ...
