rfc: A new tool to implement memory stress #25
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Signed-off-by: FingerLeader <[email protected]>
Signed-off-by: FingerLeader <[email protected]>
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There is my implementation, PTAL at memStress. |
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| Using `syscall.Mmap()` to allocate memory space directly, so that uncertain footprint can be avoided. And write 1 byte on every virtual memory page of the space we allocated can achieve our goal. | ||
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| ```data, err := syscall.Mmap(-1, 0, length, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANONYMOUS)``` |
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data, err := syscall.Mmap(-1, 0, length, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANONYMOUS)
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Can you add more introduction about syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANONYMOUS
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The parameter syscall.PROT_READ|syscall.PROT_WRITE let us read and write the array data, so we can write some bytes in it to occupy memory page.
And the parameter syscall.MAP_PRIVATE makes the mapping not visible to other processes and are not carried through to the underlying file, syscall.MAP_ANONYMOUS makes the mapping won't be backed by any file. Therefore, the allocated memory will not leave any mark or be accessed.
You can get more information at https://man7.org/linux/man-pages/man2/mmap.2.html.
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You need to add this introduction on RFC
Signed-off-by: FingerLeader [email protected]