Monotonic clock access for Python
Project description
Monoclock
Monoclock is a fast Python module that provides access to the monotonic clock on Linux and OS X.
Compatibility: tested on CPython 2.6.5, CPython 2.7, pypy 1.3, and pypy 1.4.
Usage
` import monoclock t = monoclock.nano_count() print t `
If you want seconds, divide t by 1e9.
Installation
Make sure you have a C compiler and Python headers installed. On Ubuntu, that can be done with
` sudo apt-get install python-dev build-essential `
Then, install Monoclock from PyPi:
` pip install --user Monoclock `
or from the git repo:
` git clone https://github.com/ludios/Monoclock cd Monoclock pip install --user . `
or without pip:
` python setup.py install --user `
You should now have the monoclock module installed.
Optionally, run the tests with python run_tests.py
Misc
If you’re having trouble with monotonic clocks, see:
http://code-factor.blogspot.com/2009/11/monotonic-timers.html
Factor’s source code.
Chromium’s source code.
Wishlist
Windows support.
Solaris support (does it work?).
Expose CLOCK_MONOTONIC_RAW (which is not adjusted by NTP).
Support buggy AMD chips, or expose a probablyBuggy() function that returns True if the monotonic clock is unreliable.
Note: Chromium’s base/time_win.cc just disables use of the monotonic clock on Athlon X2 CPUs with if (cpu.vendor_name() == “AuthenticAMD” && cpu.family() == 15
Contributing
Patches and pull requests are welcome.
This coding standard applies: http://ludios.org/coding-standard/
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