what processor family does intel core duo L2400 belong to?

what processor family does intel core duo L2400 belong to?

[George Nychis]

Hi,

I am configuring the 2.6.17 kernel for a new thinkpad x60s, and I am 
wondering what processor family to select.  The processor is an Intel 
Core Duo L2400, and the gcc people suggested using the prescott march 
for cflags.  It is *not* a celeron.

My guess is the "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" family, 
but maybe someone has a different opinion or can support it.

Here is the /proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 14
model name	: Genuine Intel(R) CPU           L2400  @ 1.66GHz
stepping	: 8
cpu MHz		: 1662.571
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx pni monitor vmx 
est tm2 xtpr
bogomips	: 3331.72

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 14
model name	: Genuine Intel(R) CPU           L2400  @ 1.66GHz
stepping	: 8
cpu MHz		: 1662.571
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx pni monitor vmx 
est tm2 xtpr
bogomips	: 3325.15

Thanks!
George

Re: what processor family does intel core duo L2400 belong to?

[Barry K. Nathan]

On 6/8/06, George Nychis <gnychis@cmu.edu> wrote:
> My guess is the "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" family,
> but maybe someone has a different opinion or can support it.
>
> Here is the /proc/cpuinfo:
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 14
[snip]

"Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" are all family 15, not family 6.

I have a Pentium M, it's family 6 model 13. Also, AFAIK the Intel Core
is based on the Pentium M (which in turn is based on Pentium III). So,
my personal best guess would be to choose "Pentium M".

Unfortunately, I don't have one of these (Intel Core) at this point,
so I can't test it myself...
-- 
-Barry K. Nathan <barryn@pobox.com>

Re: what processor family does intel core duo L2400 belong to?

[George Nychis]

Barry K. Nathan wrote:
> On 6/8/06, George Nychis <gnychis@cmu.edu> wrote:
> 
>> My guess is the "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" family,
>> but maybe someone has a different opinion or can support it.
>>
>> Here is the /proc/cpuinfo:
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 14
> 
> [snip]
> 
> "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" are all family 15, not 
> family 6.
> 
> I have a Pentium M, it's family 6 model 13. Also, AFAIK the Intel Core
> is based on the Pentium M (which in turn is based on Pentium III). So,
> my personal best guess would be to choose "Pentium M".
> 
> Unfortunately, I don't have one of these (Intel Core) at this point,
> so I can't test it myself...

Put me in your shoes, what would you test to see which one is the true 
choice?

Re: what processor family does intel core duo L2400 belong to?

[Barry K. Nathan]

On 6/8/06, George Nychis <gnychis@cmu.edu> wrote:
> Put me in your shoes, what would you test to see which one is the true
> choice?

I'd start by seeing which one (if either) will boot the system (with
CONFIG_X86_GENERIC disabled). In the past, when I've had trouble
deciding, this has actually eliminated more possibilities than you
might expect.

Beyond that, I don't know for certain what I would test with. Perhaps
I'd start with lmbench, or if I was using the system for 3D stuff,
perhaps framerates from glxgears or a 3D game. If I was using the
system for network stuff, I'd run network benchmarks. (Perhaps disk
benchmarks would be good too, but my experience is that network
performance tends to suffer first and/or more severely, especially if
Gigabit Ethernet or slow CPU's are involved.)

If both choices boot, the performance difference may be quite small.
-- 
-Barry K. Nathan <barryn@pobox.com>

Re: what processor family does intel core duo L2400 belong to?

[George Nychis]

Barry K. Nathan wrote:
> On 6/8/06, George Nychis <gnychis@cmu.edu> wrote:
> 
>> Put me in your shoes, what would you test to see which one is the true
>> choice?
> 
> 
> I'd start by seeing which one (if either) will boot the system (with
> CONFIG_X86_GENERIC disabled). In the past, when I've had trouble
> deciding, this has actually eliminated more possibilities than you
> might expect.
> 
> Beyond that, I don't know for certain what I would test with. Perhaps
> I'd start with lmbench, or if I was using the system for 3D stuff,
> perhaps framerates from glxgears or a 3D game. If I was using the
> system for network stuff, I'd run network benchmarks. (Perhaps disk
> benchmarks would be good too, but my experience is that network
> performance tends to suffer first and/or more severely, especially if
> Gigabit Ethernet or slow CPU's are involved.)
> 
> If both choices boot, the performance difference may be quite small.

Both booted... I was hoping this would be a lot more straight forward :P 
  I am getting the feeling that pentium-m might outperform... my true P4 
computer is in family 15, whereas my PIII is in family 6, just like the 
Core Duo L2400

Re: what processor family does intel core duo L2400 belong to?

[George Nychis]

One more thing:
http://prisguide.hardware.no/product.php?product_id=39908&view=productinfo

It turns out the socket is "Socket 479M" ... thats pentium-m isn't it?

This also seems to agree its pentium-m:
http://www.answers.com/topic/intel-processor-confusion

By the way, these results came from a google of "L2400 prescott", so its 
not like my google is swaying this one way or another

Therefore, i'm going with pentium-m!

Thanks for the help guys,
George


Barry K. Nathan wrote:
> On 6/8/06, George Nychis <gnychis@cmu.edu> wrote:
> 
>> Put me in your shoes, what would you test to see which one is the true
>> choice?
> 
> 
> I'd start by seeing which one (if either) will boot the system (with
> CONFIG_X86_GENERIC disabled). In the past, when I've had trouble
> deciding, this has actually eliminated more possibilities than you
> might expect.
> 
> Beyond that, I don't know for certain what I would test with. Perhaps
> I'd start with lmbench, or if I was using the system for 3D stuff,
> perhaps framerates from glxgears or a 3D game. If I was using the
> system for network stuff, I'd run network benchmarks. (Perhaps disk
> benchmarks would be good too, but my experience is that network
> performance tends to suffer first and/or more severely, especially if
> Gigabit Ethernet or slow CPU's are involved.)
> 
> If both choices boot, the performance difference may be quite small.

Re: what processor family does intel core duo L2400 belong to?

[dean gaudet]

On Thu, 8 Jun 2006, George Nychis wrote:

> Hi,
> 
> I am configuring the 2.6.17 kernel for a new thinkpad x60s, and I am wondering
> what processor family to select.  The processor is an Intel Core Duo L2400,
> and the gcc people suggested using the prescott march for cflags.  It is *not*
> a celeron.

the core duo is a pentium-m (well, a pair of p-m).  it's just a branding 
change at this point (an annoying brand name too)... future "core2" have a 
different microarchitecture but i'd still choose pentium-m for early 
kernels on those too... until someone finds some reason to differentiate 
core2.

you can see it's even the same family as pentium-m... see 
<http://sandpile.org/ia32/cpuid.htm> and search for "Intel P6-core" to see 
all the related models in family 6.

-dean

Re: what processor family does intel core duo L2400 belong to?

[Andi Kleen]

George Nychis <gnychis@cmu.edu> writes:

> I am configuring the 2.6.17 kernel for a new thinkpad x60s, and I am
> wondering what processor family to select.  The processor is an Intel
> Core Duo L2400, and the gcc people suggested using the prescott march
> for cflags.  It is *not* a celeron.
> 
> My guess is the "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" family,
> but maybe someone has a different opinion or can support it.

It's a renamed Pentium-M followon. Not related to Pentium 4.

-Andi

Re: what processor family does intel core duo L2400 belong to?

[Pádraig Brady]

What does the following script say?
http://www.pixelbeat.org/scripts/gcccpuopt

Pádraig.