Hi,

How optimized is FPC itself when I do a 'make all' in the source directory? No optimization, memory optimized, speed optimized, all of the above, etc..

Can I improve performance of the 64bit FPC compiler for my Quad Core processor? If so, what parameters do I pass to the make command?

Regards,
- Graeme -

_______________________________________________
fpGUI - a cross-platform Free Pascal GUI toolkit
http://opensoft.homeip.net/fpgui/

In our previous episode, graemeg.lists said:

Which quad core? There are afaik at least four microarchitectures for x86_64 that have quadcores. I7, Core2 (depending on your viewpoint if that counts as a quadcore or a dual dualcore), Phenom and Phenom II.

2009/9/24 Marco van de Voort :

Which quad core? There are afaik at least four microarchitectures for x86_64 that have quadcores. I7, Core2 (depending on your viewpoint if that counts as a quadcore or a dual dualcore), Phenom and Phenom II.

I don't know which "model" mine is. Here is partial output from /proc/cpuinfo

--------- /proc/cpuinfo ----------------
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz stepping : 10
cpu MHz : 1998.000
cache size : 3072 KB
------------------------------

Regards,
- Graeme -

_______________________________________________
fpGUI - a cross-platform Free Pascal GUI toolkit
http://opensoft.homeip.net/fpgui/

I don't know which "model" mine is.

<snip>

model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz

Sometimes you are just too funny, Graeme.

R.

2009/9/24 Reimar Grabowski :

Sometimes you are just too funny, Graeme.

:-)

Does FPC actually differentiate optimization between Core2 vs i7 vs Phenom etc? Or does it group those into something like optimization level 3 (just an example) and detect currently used CPU itself (if not specified like in cross-compiling), where level 0 is not optimization and level 3 being full optimization.

Regards,
- Graeme -

_______________________________________________
fpGUI - a cross-platform Free Pascal GUI toolkit
http://opensoft.homeip.net/fpgui/

graemeg.lists wrote

How optimized is FPC itself when I do a 'make all' in the source directory? No optimization, memory optimized, speed optimized, all of the above, etc..

For speed.

Can I improve performance of the 64bit FPC compiler for my Quad Core processor? If so, what parameters do I pass to the make command?

OPT="-Cppentiumm -Oppentiumm"

Note that the differences will probably be too small to notice in most programs.

Jonas

Jonas Maebe wrote

> Can I improve performance of the 64bit FPC compiler for my Quad Core > processor? If so, what parameters do I pass to the make command? OPT="-Cppentiumm -Oppentiumm"

Sorry, that's for a 32 bit compiler. For a 64 bit compiler, there are no special options to use (since all of them are Pentiumm-class or above anyway).

Jonas

Graeme Geldenhuys wrote

Does FPC actually differentiate optimization between Core2 vs i7 vs Phenom etc?

No.

Or does it group those into something like optimization level 3 (just an example)

It groups them using the -Opxxx/-Cpxxx parameters. Use fpc -i to see which options are supported for your target (if any).

Jonas