It's UWAweek 44 (2nd semester, 1st exam week)

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 UWA week 41 (2nd semester, week 11) ↓
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6:30pm Wed 9th Oct, ANONYMOUS

This input is on the project sheet [0 2 1 3 3 2 2 0 2 1 0 2 3 0] at t=7, the RAM should look like this right? [0₀ 2₀ 1₀ 3₀ 3₁ 2₁ 2₂ 0₁] then at t=13 the RAM would look like this right, since local LRU means that the next page replaces its previous page? [0₂ 2₃ 1₁ 3₂ 3₁ 2₀ 2₂ 0₃] Im not so clear on how out.txt should look like. The first 4 lines has to be the process page tables right? and then a fifth line shows the RAM content at the end (in this case at t=13)? So the out.txt of the example above should look like this? For the RAM content is it process, page, time stamp; or page, process, time stamp; ? 99, 99, 0, 7 99, 2, 99, 99 5, 99, 6, 1 99, 4, 3, 99 2,0,10;2,0,10;3,2,8;3,2,8;1,1,9;1,1,9;1,3,4;1,3,4;0,2,11;0,2,11;2,2,6;2,2,6;3,0,13;3,0,13; and another thing - if all processes has at least 1 page in the RAM by t=7 then the RAM will always look that way right? as in that only page numbers will change from that point onwards?


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6:34am Thu 10th Oct, Joshua N.

ANONYMOUS wrote:
> This input is on the project sheet [0 2 1 3 3 2 2 0 2 1 0 2 3 0] > > at t=7, the RAM should look like this right? > [0₀ 2₀ 1₀ 3₀ 3₁ 2₁ 2₂ 0₁] > > then at t=13 the RAM would look like this right, since local LRU means that the next page replaces its previous page? > [0₂ 2₃ 1₁ 3₂ 3₁ 2₀ 2₂ 0₃]
Yes.
> Im not so clear on how out.txt should look like. The first 4 lines has to be the process page tables right? and then a fifth line shows the RAM content at the end (in this case at t=13)?
Yes.
>So the out.txt of the example above should look like this? For the RAM content is it process, page, time stamp; or page, process, time stamp; ? > > 99, 99, 0, 7 > 99, 2, 99, 99 > 5, 99, 6, 1 > 99, 4, 3, 99 > 2,0,10;2,0,10;3,2,8;3,2,8;1,1,9;1,1,9;1,3,4;1,3,4;0,2,11;0,2,11;2,2,6;2,2,6;3,0,13;3,0,13;
I believe it follows the same order as the struct, which is process;page;last access time.
> and another thing - if all processes has at least 1 page in the RAM by t=7 then the RAM will always look that way right? as in that only page numbers will change from that point onwards?
Yes, since we are using local LRU.


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10:34am Thu 10th Oct, ANONYMOUS

Thanks! But one more question, the project specifies this structure: struct { int process_id; int page_num; int last_accessed; } memory; Would i be penalised if i do not use that struct or can i do this project in any way I like?


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12:23pm Thu 10th Oct, Joshua N.

ANONYMOUS wrote:
> Thanks! > > But one more question, the project specifies this structure: > struct { > int process_id; > int page_num; > int last_accessed; > } memory; > > Would i be penalised if i do not use that struct or can i do this project in any way I like?
The specification states that the struct you use "may" look like the one it provides. So, no you don't have to use the exact same struct. However, I do believe you need to use a struct.

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