Running arch64 on a kinda/sorta 64bit Sempron.

omgwtfbyobbq · 2006-11-20 13:58:04

I was wondering if anyone had experience doing this? The Sempron I'm using is supposedly 64bit capable, shows up as 64bit according to memtest, and runs arch64. However, when I installed arch64 I noticed some odd behavior, and decided to go back to 32 bit.

kozaki · 2006-11-20 14:16:23

At least I got Mandriva 2007 x86_64 installed & running fine on 2 Sempron 64-bit capables. Two 2600+ I think.

Sempron's are just Athlon with less cache (128k vs 512k)

ganja_guru · 2006-11-20 18:08:00

what odd behaviour, specifically? (yes, that's how we spell behaviour where I am)

omgwtfbyobbq · 2006-11-20 22:45:42

No, you can't spell like that, it's wrong, morally, and morally!
I had some issues with shell latency, although I think that may have been related to my videocard weirdness, and mplayer complained about some object. I figure I might as well get it set up for 32bit first since I know everything works, and then mess around with arch64 on another partition.

kozaki · 2006-11-22 00:59:32

Maybe of interest for you omgwtfbyobbq:

Safe Cflags - Gentoo Linux Wiki wrote:

Sempron/Sempron64 (AMD)
* If it is a Socket A (Socket 462) Sempron you can be sure it is neither 64-bit capable nor SSE2/SSE3 capable.
* If it is a Socket AM2 Sempron you can be sure it is both 64-bit and SSE3 capable.
* If it is a Socket 754 it depends on the stepping (part number):
o Steppings: CG (Part No.: *AX) or D0 (Part No.: *BA) have neither SSE3 nor AMD64
o Stepping: E3 (Part No.: *BO) has SSE3
o Stepping: E6 (Part No.: *BX) has SSE3 and AMD64
* Anyway you should check /proc/cpuinfo for pni (SSE3) string before using -msse3.

omgwtfbyobbq · 2006-11-22 02:04:48

Ah, cool, thanks for the info! According to /proc/cpuinfo it doesn't have pni/sse3, but I'm still curious why memtest listed it as an amd64. If I download an ubuntu64 livecd, would booting it present problems if my Sempron is on 32 bit capable?

kozaki · 2006-11-22 11:22:24

Are you sure your CPU does not show 'pni' ?
I didn't notice it first, but it _is_ at the end of the flags in this location.

Well I'm pretty sure you eventually could not boot any 64-bit OS/LiveCD if your PC lacks 64-bit instructions.
I've tried it 2-3 times and it won't even start to boot, with a message that let no doubts about why it can't !

omgwtfbyobbq · 2006-11-22 15:33:09

Yup, unless I'm blind, which may be the case.

fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up lahf_lm ts fid vid ttp

I was also able to boot the ubuntu64 livecd. So... Eh?

kozaki · 2006-11-22 17:34:24

well yours doesn't have sse3/pni.
Can you reveal this "kinda/sorta 64bit Sempron" exact stepping for information ?

omgwtfbyobbq · 2006-11-22 22:12:55

Sure thing. Although, I think more information may be required than /proc/cpuinfo provides. I'm not sure if 0 corresponds to D0, or just means the stepping is unknown.

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 28
model name      : AMD Sempron(tm) Processor 3000+
stepping        : 0
cpu MHz         : 1799.587
cache size      : 128 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up lahf_lm ts fid vid ttp
bogomips        : 3600.77

kozaki · 2006-11-23 00:13:04

Ah hem you need to look at the Number on the CPU die.

Steppings: CG (Part No.: *AX) or D0 (Part No.: *BA) have neither SSE3 nor AMD64
Stepping: E3 (Part No.: *BO) has SSE3
Stepping: E6 (Part No.: *BX) has SSE3 and AMD64

jb · 2006-11-30 03:52:37

Since socket 754 is the only architecture that this could be in question:

Implementation: Sempron 754pins OµPGA - Socket754
Instruction set Paris/Palermo D0 stepping: RISC - IA32 - NXbit - MMX - 3DNow! - SSE - SSE2
Instruction set Winchester 128KB D0 stepping: RISC - IA32 - x86-64 - NXbit - MMX - 3DNow! - SSE - SSE2
Instruction set Palermo E3 stepping: RISC - IA32 - NXbit - MMX - 3DNow! - SSE - SSE2 - SSE3
Instruction set Palermo E6 stepping: RISC - IA32 - x86-64 - NXbit - MMX - 3DNow! - SSE - SSE2 - SSE3

So it is possible to have any combination of sse3 and x86_64. I'm going to assume you have a 754, but you mind posting your socket type?

omgwtfbyobbq · 2006-12-01 08:42:11

Yup, 754 mobo/chip that I picked up for a song at fry's after I heard they were 64 bit capable on fw. I'll try to check out the stepping when it goes down next time.

edit- although, it must be a Winchester 128kb D0 since memtest tells me it's 64bit, I've installed and run Arch64, and it boots the Ubuntu64 livecd np but doesn't have sse3.

Arch Linux

#1 2006-11-20 13:58:04

Running arch64 on a kinda/sorta 64bit Sempron.

#2 2006-11-20 14:16:23

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#3 2006-11-20 18:08:00

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#4 2006-11-20 22:45:42

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#5 2006-11-22 00:59:32

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#6 2006-11-22 02:04:48

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#7 2006-11-22 11:22:24

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#8 2006-11-22 15:33:09

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#9 2006-11-22 17:34:24

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#10 2006-11-22 22:12:55

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#11 2006-11-23 00:13:04

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#12 2006-11-30 03:52:37

Re: Running arch64 on a kinda/sorta 64bit Sempron.

#13 2006-12-01 08:42:11

Re: Running arch64 on a kinda/sorta 64bit Sempron.

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