Best gcc flags?

Best gcc flags?

[Mark Knecht]

Hi,
   I've got a new Intel Core i5-661 machine that I'm loading Gentoo
on. I wonder if anyone here has any strong opinion son the best gcc
options for this sort of machine and specifically what makes for the
best rt performance?

Thanks,
Mark

Re: Best gcc flags?

[John Kacur]

On Fri, Jan 22, 2010 at 7:54 PM, Mark Knecht <markknecht@gmail.com> wrote:
> Hi,
>   I've got a new Intel Core i5-661 machine that I'm loading Gentoo
> on. I wonder if anyone here has any strong opinion son the best gcc
> options for this sort of machine and specifically what makes for the
> best rt performance?
>

AFAIK, there are no -rt specific requirements for gcc, just use what you
would normally use.

John
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Re: Best gcc flags?

[Mark Knecht]

On Fri, Jan 22, 2010 at 2:09 PM, John Kacur <jkacur@redhat.com> wrote:
> On Fri, Jan 22, 2010 at 7:54 PM, Mark Knecht <markknecht@gmail.com> wrote:
>> Hi,
>>   I've got a new Intel Core i5-661 machine that I'm loading Gentoo
>> on. I wonder if anyone here has any strong opinion son the best gcc
>> options for this sort of machine and specifically what makes for the
>> best rt performance?
>>
>
> AFAIK, there are no -rt specific requirements for gcc, just use what you
> would normally use.
>
> John
>

Yes that's my understanding also, but this is a brand new machine to
me, Gentoo based where I can set all my gcc flags pretty easily, and
for the Core i5-661 I'm not finding much info on what's recommended
for gcc. -march=native? Or maybe use specific settings such as those
for an i7?

I'm just grasping around for ideas mostly.

Thanks!

- Mark
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Re: Best gcc flags?

[Xavier Miller]

Hello,

Don't play with CFLAGS/LDFLAGS. -march=native will let GCC find the best
(and most sable) options for your compiler.
Playing with unsafe CFLAGS/LDFLAGS will produce unstable system, hard to
debug.

Kind regards,
Xavier Miller.

Le 22/01/10 23:58, Mark Knecht a écrit :
> On Fri, Jan 22, 2010 at 2:09 PM, John Kacur <jkacur@redhat.com> wrote:
>> On Fri, Jan 22, 2010 at 7:54 PM, Mark Knecht <markknecht@gmail.com> wrote:
>>> Hi,
>>>   I've got a new Intel Core i5-661 machine that I'm loading Gentoo
>>> on. I wonder if anyone here has any strong opinion son the best gcc
>>> options for this sort of machine and specifically what makes for the
>>> best rt performance?
>>>
>>
>> AFAIK, there are no -rt specific requirements for gcc, just use what you
>> would normally use.
>>
>> John
>>
> 
> Yes that's my understanding also, but this is a brand new machine to
> me, Gentoo based where I can set all my gcc flags pretty easily, and
> for the Core i5-661 I'm not finding much info on what's recommended
> for gcc. -march=native? Or maybe use specific settings such as those
> for an i7?
> 
> I'm just grasping around for ideas mostly.
> 
> Thanks!
> 
> - Mark
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Re: Best gcc flags?

[Mark Knecht]

On Sat, Jan 23, 2010 at 12:11 PM, Xavier Miller <xavier.miller@cauwe.org> wrote:
> Hello,
>
> Don't play with CFLAGS/LDFLAGS. -march=native will let GCC find the best
> (and most sable) options for your compiler.
> Playing with unsafe CFLAGS/LDFLAGS will produce unstable system, hard to
> debug.
>
> Kind regards,
> Xavier Miller.
>

thanks. That's the direction I went. Trying to bring up X now. When
it's up I'll start working on adding rt-sources.

Cheers,
Mark

Re: Best gcc flags?

[Xavier Miller]

The latest rt-sources for Gentoo are available in the pro-audio overlay ;)

Xavier.
Le 23/01/10 23:27, Mark Knecht a écrit :
> thanks. That's the direction I went. Trying to bring up X now. When
> it's up I'll start working on adding rt-sources.
> 
> Cheers,
> Mark
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Re: Best gcc flags?

[Mark Knecht]

Yep - I've used it for years.

On Sun, Jan 24, 2010 at 5:45 AM, Xavier Miller <xavier.miller@cauwe.org> wrote:
> The latest rt-sources for Gentoo are available in the pro-audio overlay ;)
>
> Xavier.
> Le 23/01/10 23:27, Mark Knecht a écrit :
>> thanks. That's the direction I went. Trying to bring up X now. When
>> it's up I'll start working on adding rt-sources.
>>
>> Cheers,
>> Mark
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