help2002

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help2002

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UWA week 41 (2nd semester, week 11) ↓

2nd project Format of out.txt? (all 4)

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.

2nd project Format of out.txt? (all 4)

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?

2nd project Format of out.txt? (all 4)

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.