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ep:labs:03:contents:tasks:ex5 [2020/08/03 20:04] cristian.marin0805 [05. [20p] Multitool Comparison] |
ep:labs:03:contents:tasks:ex5 [2026/03/16 16:52] (current) florin.stancu |
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| - | ==== 05. [20p] Multitool Comparison ==== | + | ==== 05. [10p] Feedback ==== |
| - | Now we will see in a slightly different approach, with a source file and a final file of the same size, how the I/O mechanisms work as they are implemented by the compiler to be optimized. | + | |
| - | + | Please take a minute to fill in the **[[https://forms.gle/moWQFAfMMmNmA2Q17 | feedback form]]** for this lab. | |
| - | Modify the script so that it reads one line at a time from the file with the novel from the previous exercise, and writes it in a resulting file 500 times each. Follow the process with a classic tool (vmstat, iostat). Why most of the time the number of **bytes read** is **0**? | + | |
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| - | TODO COSMIN: Aici pui un hidden script cu rezolvarea pt asistenti cum e la 4, in python o pui, verifica sa fie astfel incat sa tina linia in RAM. | + | |
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| - | === [10p] Task A - Different tool, same I/O === | + | |
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| - | For more special situations, a classic tool is not enough as long as we want to have a more detailed analysis on the behavior of I/O mechanisms. | + | |
| - | An example would be to create an infinite loop that **copies endlessly** (simulation of a demanding process for a long time) a **large file** (use one of the files obtained previously). | + | |
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| - | Put the command below in a script: | + | |
| - | <code bash> | + | |
| - | $ while true; do cp original_file1 copied_file2; done | + | |
| - | </code> | + | |
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| - | Use several special monitoring tools. | + | |
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| - | Choose 3-4 from here: | + | |
| - | [[https://www.golinuxcloud.com/monitor-disk-io-performance-statistics-linux/]] | + | |
| - | + | ||
| - | === [10p] Task B - Plot of Comparison === | + | |
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| - | Plot a graph with the results obtained with iostat, iotop and one of the previously chosen tools. | + | |
| - | <note> | + | |
| - | * basic plot | + | |
| - | * you can take the values manually or automatically | + | |
| - | * standardize the values (kb/s) | + | |
| - | * preferably use the matplotlib module in python | + | |
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| - | </note> | + | |
