Working with GCC’s tunable parameters¶
GCC has numerous tunable parameters, which are integer values, tweakable at the command-line by:
--param <name>=<value>
A detailed description of the current parameters (in GCC 4.6.0) can be seen at http://gcc.gnu.org/onlinedocs/gcc-4.6.0/gcc/Optimize-Options.html#Optimize-Options (search for “–param” on that page; there doesn’t seem to be an anchor to the list)
The parameters are visible from Python scripts using the following API:
- gcc.get_parameters()¶
Returns a dictionary, mapping from the option names to
gcc.Parameter
instances
- class gcc.Parameter¶
- option¶
(string) The name used with the command-line –param switch to set this value
- current_value¶
(int/long)
- default_value¶
(int/long)
- min_value¶
(int/long) The minimum acceptable value
- max_value¶
(int/long) The maximum acceptable value, if greater than min_value
- help¶
(string) A short description of the option.