You should use
32 bit profile (x86):
CHOST="i686-pc-linux-gnu"
CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j5"
That is P4... you also may consider turning the hyperthreading OFF on
BIOS, it may, or it may not make a change.
I heard you need magma-smp or similar RTAI (SMP version of it), also
check some results of good configurations here
http://osdir.com/ml/linux.distributions.emc.user/2007-01/msg00172.html
http://mail.rtai.org/pipermail/rtai/2007-December/018330.html
On Fri, Jan 30, 2009 at 4:46 PM, Eric H. Johnson
<ejohn...@camalytics.com> wrote:
> Mario,
>
> Ok, I added a hard drive, installed Debian Lenny and was able to follow the
> instructions here:
> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Debian_Lenny_Compile_RTAI
>
> I built three kernels, using processor family selections of
> 586/K5/5x86/6x86/6x86mx, even though the instructions said it was
> incompatible with smp, Pentium-Pro (which seemed to be auto-detected) and
> core 2 / newer Xeon. Building and rebooting with the built kernel in all
> cases reported 1 processor.
>
> In what I found on-line it should actually report 4 processors (2 core / 2
> logical). I don't see that any of the other processor selections match up.
> The other options under menuconfig are:
>
> 386
> 486
> 586/K5/5x86/6x86/6x86MX
> Pentium-Classic
> Pentium-MMX
> Pentium-Pro
> Pentium-II/Celeron(pre-Coppermine)
> Pentium-III/Celeron(Coppermine)/Pentium-III Xeon
> Pentium M
> Core 2/newer xeon
> Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon
> K6/K6-II/K6-III
> Athlon/Duron/K7
> Opteron/Athlon64/Hammer/K8
> Crusoe
> Efficeon
> Winchip-C6
> Winchip-2
> Winchip-2A/Winchip-3
> GeodeGX1
> Geode GX/LX
> CyrixIII/VIA-C3
> VIA C3-2 (Nehemiah)
> VIA C7
>
> I am still using the 2.6.22 kernel. Is it possible the kernel is just too
> old for the atom 330?
>
> I have not tried gentoo as at this point all I want is a kernel that
> recognizes more than one processor. Making it more efficient is just a
> bonus, and I don't know enough about building kernels to translate the
> setting to those required under gentoo.
>
> Any ideas what I should try next?
>
> Regards,
> Eric
>
>
> I guess the P6 should be generic enough... I searched a lot but no definite
> answer, other than the Atom uses SSE2, so "P6" should have enough
> performance and compatibility with all architectures (the default on many
> builds). These are important ((only?)) to make performance optimisations for
> a specific architecture (tailor-made) and Atom is very limited in all
> aspects, not sure if there is a setting for that yet. but P6 setting was
> used on other architectures taht had not their specific tag at that time.
>
>
>
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