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[Solved] Correct processor family for AMD A6 Vision
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Springer1500
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Joined: 21 Nov 2008
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Location: Winfield, KS

PostPosted: Sat Nov 30, 2013 2:09 am    Post subject: [Solved] Correct processor family for AMD A6 Vision Reply with quote

I'm trying to locate information on choosing the correct processor family in the kernel config. My initial installation seems okay using the generic x86-64 option, but I can't confirm that is correct. I only have the base system installed so far. Forums and google seem to be split between the generic and K8 option. Has anyone had experience with this processor? AMD A6-3620 APU w/Radeon HD graphics on the same chip.

Thanks in advance!


Last edited by Springer1500 on Sat Nov 30, 2013 5:22 pm; edited 1 time in total
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anbc
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PostPosted: Sat Nov 30, 2013 9:55 am    Post subject: Reply with quote

http://wiki.gentoo.org/wiki/Safe_CFLAGS#A4.2FA6.2FA8-XXXX_.2F_XXXXM
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Springer1500
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Joined: 21 Nov 2008
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Location: Winfield, KS

PostPosted: Sat Nov 30, 2013 12:34 pm    Post subject: Reply with quote

anbc wrote:
http://wiki.gentoo.org/wiki/Safe_CFLAGS#A4.2FA6.2FA8-XXXX_.2F_XXXXM


Thanks, I did set my cflags according to this already. My question is about the choice of processor family in the kernel config? The closest AMD choice reference in the kernel config is K8. I used the generic x86-64 instead and I'm trying to verify if that is "more" correct.
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anbc
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PostPosted: Sat Nov 30, 2013 1:57 pm    Post subject: Reply with quote

Yep I didn't read properly, sorry about that!
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Springer1500
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PostPosted: Sat Nov 30, 2013 2:53 pm    Post subject: Reply with quote

No worries... Things are compiling okay, probably the on-board radeon will kick my butt worse than this fine tuning of the kernel. I was able to get xorg-server running with an okay test screen, just not sure of performance yet until I get a desktop installed. Now I remember why I've steered away from AMD over the years :) I just couldn't resist the Black Friday sale! If nothing else, I've got a dandy new 1TB hard drive....
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anbc
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PostPosted: Sat Nov 30, 2013 3:46 pm    Post subject: Reply with quote

Have you thought of using "Native" (i.e., trust gcc's autodetected defaults):

Example: for the 3.12 kernel using >=gcc-4.8 (with i.e., ck-sources)

# sudo -s
# mkdir -p /etc/portage/patches/sys-kernel/ck-sources
# wget https://raw.github.com/graysky2/kernel_gcc_patch/master/kernel-312-gcc48-1.patch -P /tmp
# mv /tmp/kernel-312-gcc48-1.patch /etc/portage/patches/sys-kernel/ck-sources
# emerge ck-sources
# cd /usr/src/linux
# make menuconfig

select "Native optimizations autodetected by GCC"

https://github.com/graysky2/kernel_gcc_patch
http://forums.gentoo.org/viewtopic-t-961748.html
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Springer1500
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PostPosted: Sat Nov 30, 2013 5:21 pm    Post subject: Reply with quote

Great suggestion.... I hadn't run across that yet. Thanks! Will mark solved, for now.
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