Pearpc SDL perf

lewelby · Post by **lewelby** » Sun May 22, 2005 5:18 pm

Hi all,
im new to pearpc, i have successfully installed both panther and Tiger with networking working. I tried many version (build) of pearpc and i have noticed that SDL version run really slowly on my computer.
Athlon XP2800+ with 1.5 GB mem and ATI9700 128Mo GPU.
Is it normal ?

Mac Emu · Post by **Mac Emu** » Sun May 22, 2005 7:04 pm

Yeah, it appears to be normal. It's the same reason why the Windows port of SheepShaver is slower then the GTK Linux port.

Here's the flags I use in Cygwin to create an Athlon XP optimized ppc.exe (uses Win32 API calls instead of SDL):

./autogen.sh
./configure --enable-cpu=jitc_x86 --enable-ui=win32 --enable-debug=no CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer -ffast-math" CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer -ffast-math"
make

lewelby · Post by **lewelby** » Sun May 22, 2005 7:14 pm

Ok thank you.

and by the way thanks to all of u making such a good work.

hook · Post by **hook** » Mon May 23, 2005 2:08 pm

Is your idea working on intel too???

And how can i do the changes you describe? Have i to compile the ppc new??

Mac Emu · Post by **Mac Emu** » Mon May 23, 2005 6:43 pm

If you are referring to my post, those are the commands I enter at the Cygwin terminal prompt (after downloading the PearPC source code via CVS) to create an up-to-date build for Athlon-XP.

Cywin is a virtual Linux system that runs on Windows. The biggest difficulty is figuring out which Cygwin packages to install to allow compilation of PearPC.

http://www.cygwin.com/

You could use the following for a PIV optimized build:

./autogen.sh --enable-cpu=jitc_x86 --enable-ui=win32 --enable-debug=no CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer -ffast-math" CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer -ffast-math"
make

trygvebw · Post by **trygvebw** » Thu May 26, 2005 1:56 pm

Mac Emu wrote:Cywin is a virtual Linux system that runs on Windows. The biggest difficulty is figuring out which Cygwin packages to install to allow compilation of PearPC.

http://www.cygwin.com/

There's a list on the PearPC wiki here: http://wiki.pearpc.net/index.php/FAQs#PearPC_from_CVS.

Borg_Will_Rule · Post by **Borg_Will_Rule** » Sun May 29, 2005 9:54 pm

When i finish compiling i always get that white bar at the top of PPC what can i do to get rid of it?

hook · Post by **hook** » Mon May 30, 2005 7:00 am

Can someone create an new ppc for my P4 Northwood with 3Ghz and send it per E-Mail?

Havin_it · Post by **Havin_it** » Mon May 30, 2005 12:53 pm

Mac Emu wrote: ./configure --enable-cpu=jitc_x86 --enable-ui=win32 --enable-debug=no CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer -ffast-math" CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer -ffast-math"
make

A couple of those flags are redundant:

-pipe is already there as a default in the configure script
-fomit-frame-pointer is already included by invoking -O3 (a superset of many optimisations)

@Borg_will_rule: that white bar is a feature of Win32 builds. Try an SDL build.