Difference between revisions of "Fs2 open on Linux/Optimization"
From FreeSpace Wiki
(The error from -ftree-vectorize was worked around in r9480) |
|||
| (4 intermediate revisions by the same user not shown) | |||
| Line 8: | Line 8: | ||
<p></p>{{Note| This step is only for those who want the bleeding-edge source code to compile on their own. You can skip this if you intend to use a provided binary executable.}} | <p></p>{{Note| This step is only for those who want the bleeding-edge source code to compile on their own. You can skip this if you intend to use a provided binary executable.}} | ||
Optimizing fs2_open might have little or no effect, or improve performance greatly, I honestly have no clue.<br> | Optimizing fs2_open might have little or no effect, or improve performance greatly, I honestly have no clue.<br> | ||
| − | You can specify your compiler flags with the configure script, | + | You can specify your compiler flags with the configure script, see below. |
$ ./configure CFLAGS="<your desired flags>" | $ ./configure CFLAGS="<your desired flags>" | ||
If you want to play it safe, a good set of CFLAGS would be | If you want to play it safe, a good set of CFLAGS would be | ||
$ ./configure CFLAGS="-march=native -O3 -pipe -fomit-frame-pointer -fno-ident" CXXFLAGS="$CFLAGS" | $ ./configure CFLAGS="-march=native -O3 -pipe -fomit-frame-pointer -fno-ident" CXXFLAGS="$CFLAGS" | ||
| − | + | In particular, the following flag has been reported to increase the FPS when not looking at nebula: (thanks to oldlaptop for this advice) | |
| − | $ | + | $ -fpredictive-commoning |
You should read up on CFLAGS and what they do before trying anything. I recommend you read through these links (adjust the URL as required for your version of GCC).<br> | You should read up on CFLAGS and what they do before trying anything. I recommend you read through these links (adjust the URL as required for your version of GCC).<br> | ||
Latest revision as of 09:30, 25 September 2013
| « Pre-Compile Configuration | The fs2_open on Linux Guide Optimization |
Compiling » |
Warning: If you compile a debug build, don't use the -fomit-frame-pointer and -fno-ident compiler flags, as it will make debugging impossible.
Note: This step is only for those who want the bleeding-edge source code to compile on their own. You can skip this if you intend to use a provided binary executable.
Optimizing fs2_open might have little or no effect, or improve performance greatly, I honestly have no clue.
You can specify your compiler flags with the configure script, see below.
$ ./configure CFLAGS="<your desired flags>"
If you want to play it safe, a good set of CFLAGS would be
$ ./configure CFLAGS="-march=native -O3 -pipe -fomit-frame-pointer -fno-ident" CXXFLAGS="$CFLAGS"
In particular, the following flag has been reported to increase the FPS when not looking at nebula: (thanks to oldlaptop for this advice)
$ -fpredictive-commoning
You should read up on CFLAGS and what they do before trying anything. I recommend you read through these links (adjust the URL as required for your version of GCC).
http://gcc.gnu.org/onlinedocs/gcc-4.2.0/gcc/Optimize-Options.html
http://gentoo-wiki.com/Safe_Cflags
