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Python mlock Module

A Python interface to allocate page-locked memory, in order to accurately simulate memory pressure.

Installation

Package installation

Pip

pip install mlock

Manual

python setup.py install

System configuration

Unless you're willing to run with sudo privileges, you'll need to update the memlock ulimit. To do so, add the following lines to /etc/security/limits.conf (you'll need sudo privileges to edit this file).

*   soft    memlock     unlimited
*   hard    memlock     unlimited

Alternatively, instead of unlimited you can specify the maximum (total, across all caches) size you plan to use.

Documentation

This module adds a new class, mlock.PyBalloon, initialized with a single size parameter, specifying the size of the page-locked region to be allocated in bytes.

PyBalloon.get_size()

Returns the size of the balloon's page-locked region in bytes.

PyBalloon.set_used(used: Bool)

Set's the balloon's allocation status to used. Intended to allow balloons to be reused and/or shared.

PyBalloon.get_used()

Returns the balloon's allocation status.