mirror of
https://github.com/RGBCube/serenity
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b74cb569ec
Use LibCore ArgsParser to parse the parameters instead of using the raw strings from the argv (Main::Arguments) array. Also, use indicative names for variables in the code so the utility code is more understandable.
99 lines
1.8 KiB
Markdown
99 lines
1.8 KiB
Markdown
## Name
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allocate - allocate memory
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## Synopsis
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```**sh
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$ allocate [--unit B/KiB/MiB/GiB] [--sleep-time N] [number]
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```
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## Description
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`allocate` allocates a specific amount of virtual memory. If nothing is specified
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then it will allocate 100 bytes of memory.
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If `number` is specified without `unit`, it will default to `number` of bytes.
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It also writes to each allocated page and then sleeps for N seconds (by default 10).
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It is primarily used to test the kernel's memory management capabilities.
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## Options
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* `-u`, `--size-unit`: Allocation's Size Unit (Base 2 units - B, KiB, MiB or GiB)
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* `-n`, `--sleep-time`: Number of seconds to sleep before freeing memory
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## Examples
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```sh
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$ allocate 500
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allocating memory (500 bytes)...
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done in 0ms
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writing one byte to each page of allocated memory...
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done in 0ms
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sleeping for 10 seconds...
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0
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1
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9
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done.
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freeing memory...
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done in 0ms
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$ allocate 500 -u KiB
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allocating memory (512000 bytes)...
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done in 0ms
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writing one byte to each page of allocated memory...
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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done in 4ms
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sleeping for 10 seconds...
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0
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9
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done.
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freeing memory...
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done in 0ms
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$ allocate -u KiB -n 2 500
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allocating memory (512000 bytes)...
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done in 0ms
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writing one byte to each page of allocated memory...
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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step took 1ms (46.875MiB/s)
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done in 0ms
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sleeping for 2 seconds...
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0
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1
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done.
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freeing memory...
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done in 0ms
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```
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