Re: SUMMARY: CPUTYPE for VIA EPIA M-Series Mini-ITX
On Fri, Mar 16, 2007 at 04:33:15PM +, RW wrote:
> On Thu, 15 Mar 2007 14:39:00 -0500
> Jeffrey Goldberg <[EMAIL PROTECTED]> wrote:
>
> > I've had two responses telling me that the make.conf defaults are
> > just fine, and two (one off list) recommending i686/pentiumpro. One
> > for pentiumpro and the other for i686, but as Andreas Rudish
> > helpfully pointed out, those two are probably the same thing. No
> > one suggested using c3. In fact, cpghost emphatically stated not to
> > use C3 in make.conf
>
> From: /usr/share/mk/bsd.cpu.mk
>
> . elif ${CPUTYPE} == "c3"
> MACHINE_CPU = 3dnow mmx i586 i486 i386
> . elif ${CPUTYPE} == "c3-2"
> MACHINE_CPU = sse mmx i586 i486 i386
>
> If you look at the screenshot of the CPUID window from the review
> linked by Garrett, it says the Nehemiah has sse but not 3dnow, which
> matches the c3-2 settings above.
>
> I would recommend that you comment out C[XX]FLAGS and try again
> with CPUTYPE=c3-2
>
> FreeBSD isn't Gentoo, and using Gentoo's settings may cause trouble in
> the long-term. If you set CPUTYPE properly, FreeBSD will normally
> come-up with sensible optimizations.
The above is good advice, but I personally don't recall there ever being
a c3 CPUTYPE designation. For example:
$ grep -i c3 /usr/share/mk/bsd.cpu.mk
$ sed q /usr/share/mk/bsd.cpu.mk ; uname -r
# $FreeBSD: src/share/mk/bsd.cpu.mk,v 1.48 2005/05/24 21:24:40 cognet Exp $
6.1-RELEASE
On other hand, from reading your headers:
X-Mailer: Claws Mail 2.8.0 (GTK+ 2.10.11; i386-portbld-freebsd6.2)
suggests to me that it may have been added to 6.2. If that's the case,
then it merits being pointed out.
Cheers.
--
George
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Re: SUMMARY: CPUTYPE for VIA EPIA M-Series Mini-ITX
On Thu, 15 Mar 2007 14:39:00 -0500
Jeffrey Goldberg <[EMAIL PROTECTED]> wrote:
> I've had two responses telling me that the make.conf defaults are
> just fine, and two (one off list) recommending i686/pentiumpro. One
> for pentiumpro and the other for i686, but as Andreas Rudish
> helpfully pointed out, those two are probably the same thing. No
> one suggested using c3. In fact, cpghost emphatically stated not to
> use C3 in make.conf
>
> Adbullah Ibn Hamad Al-Marri also helpfully directed me for
> information about safe CFLAGS to
>
>http://gentoo-wiki.com/Safe_Cflags
>
> where the entry for the Via Nehemiah says:
>
> ==
> Nehemiah (C5XL)/C5P (Via)
>
> CHOST="i686-pc-linux-gnu"
> CFLAGS="-march=i686 -msse -mmmx -O2 -pipe -fomit-frame-pointer"
> CXXFLAGS="${CFLAGS}"
>
> note: The more recent versions of the C3 do support the cmov
> instruction and hence -march=i686. If you must be compatible with
> all VIA C3 versions, do not use the settings in this section.
>
> note: it is also possible to use "-march=c3-2". <-- Comment to this:
> I got a problem "compiler can't create executables" with this setting.
From: /usr/share/mk/bsd.cpu.mk
. elif ${CPUTYPE} == "c3"
MACHINE_CPU = 3dnow mmx i586 i486 i386
. elif ${CPUTYPE} == "c3-2"
MACHINE_CPU = sse mmx i586 i486 i386
If you look at the screenshot of the CPUID window from the review
linked by Garrett, it says the Nehemiah has sse but not 3dnow, which
matches the c3-2 settings above.
I would recommend that you comment out C[XX]FLAGS and try again
with CPUTYPE=c3-2
FreeBSD isn't Gentoo, and using Gentoo's settings may cause trouble in
the long-term. If you set CPUTYPE properly, FreeBSD will normally
come-up with sensible optimizations.
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Re: SUMMARY: CPUTYPE for VIA EPIA M-Series Mini-ITX
Jeffrey Goldberg wrote:
[mailed, posted and bcc'ed to off list respondents]
First let me quote my original query:
I have one of these
CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU)
Origin = "CentaurHauls" Id = 0x691 Stepping = 1
Features=0x380b035
http://www.via.com.tw/en/products/mainboards/motherboards.jsp?motherboard_id=81
And 6.2-RELEASE p2
When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build just
fine, but (at least) gcc ended up broken. Most compiling attempts
after that ended up with gcc reporting an internal error.
Now that I've entered the FreeBSD world and am building everything
from source, I would like to take advantage of that by compiling for
my system.
Does anyone have a similar system? And what CPUTYPE or local tuning
do you recommend?
A dmesg for the system is available at
http://ntp0.goldmark.org/temp/dmesg
I've had two responses telling me that the make.conf defaults are just
fine, and two (one off list) recommending i686/pentiumpro. One for
pentiumpro and the other for i686, but as Andreas Rudish helpfully
pointed out, those two are probably the same thing. No one suggested
using c3. In fact, cpghost emphatically stated not to use C3 in make.conf
Adbullah Ibn Hamad Al-Marri also helpfully directed me for information
about safe CFLAGS to
http://gentoo-wiki.com/Safe_Cflags
where the entry for the Via Nehemiah says:
==
Nehemiah (C5XL)/C5P (Via)
CHOST="i686-pc-linux-gnu"
CFLAGS="-march=i686 -msse -mmmx -O2 -pipe -fomit-frame-pointer"
CXXFLAGS="${CFLAGS}"
note: The more recent versions of the C3 do support the cmov instruction
and hence -march=i686. If you must be compatible with all VIA C3
versions, do not use the settings in this section.
note: it is also possible to use "-march=c3-2". <-- Comment to this: I
got a problem "compiler can't create executables" with this setting.
note: I had much better luck with -Os than with -O2. The cache on the
nehemiah chips is really small, so making the executables small helps
more than anything else.
==
The off list response added
- Setting CPUTYPE to pentium, or pentiumpro both work fine. IIRC,
the C3 designation is Linux-specific and doesn't exist for
FreeBSD.
If everybody agrees that the c3 designation is unwise to use, then
probably the distributed
/usr/share/examples/etc/make.conf
The off list responded gave extremely helpful and detailed information
about trimming the kernel for a similar box. I've already done most of
what that recommends.
In sum, don't use the c3 specification in /etc/make.conf even though the
example would suggested otherwise.
Thanks all for your help
-j
Indeed. After reading a mock up of the processor is appears that it's an
Intel 686 clone. See:
(it's a bit old for an article, so I hope you don't mind the dust :)..).
-Garrett
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SUMMARY: CPUTYPE for VIA EPIA M-Series Mini-ITX
[mailed, posted and bcc'ed to off list respondents]
First let me quote my original query:
I have one of these
CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU)
Origin = "CentaurHauls" Id = 0x691 Stepping = 1
Features=0x380b035
http://www.via.com.tw/en/products/mainboards/motherboards.jsp?
motherboard_id=81
And 6.2-RELEASE p2
When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build
just fine, but (at least) gcc ended up broken. Most compiling
attempts after that ended up with gcc reporting an internal error.
Now that I've entered the FreeBSD world and am building everything
from source, I would like to take advantage of that by compiling
for my system.
Does anyone have a similar system? And what CPUTYPE or local
tuning do you recommend?
A dmesg for the system is available at
http://ntp0.goldmark.org/temp/dmesg
I've had two responses telling me that the make.conf defaults are
just fine, and two (one off list) recommending i686/pentiumpro. One
for pentiumpro and the other for i686, but as Andreas Rudish
helpfully pointed out, those two are probably the same thing. No one
suggested using c3. In fact, cpghost emphatically stated not to use
C3 in make.conf
Adbullah Ibn Hamad Al-Marri also helpfully directed me for
information about safe CFLAGS to
http://gentoo-wiki.com/Safe_Cflags
where the entry for the Via Nehemiah says:
==
Nehemiah (C5XL)/C5P (Via)
CHOST="i686-pc-linux-gnu"
CFLAGS="-march=i686 -msse -mmmx -O2 -pipe -fomit-frame-pointer"
CXXFLAGS="${CFLAGS}"
note: The more recent versions of the C3 do support the cmov
instruction and hence -march=i686. If you must be compatible with all
VIA C3 versions, do not use the settings in this section.
note: it is also possible to use "-march=c3-2". <-- Comment to this:
I got a problem "compiler can't create executables" with this setting.
note: I had much better luck with -Os than with -O2. The cache on the
nehemiah chips is really small, so making the executables small helps
more than anything else.
==
The off list response added
- Setting CPUTYPE to pentium, or pentiumpro both work fine. IIRC,
the C3 designation is Linux-specific and doesn't exist for
FreeBSD.
If everybody agrees that the c3 designation is unwise to use, then
probably the distributed
/usr/share/examples/etc/make.conf
The off list responded gave extremely helpful and detailed
information about trimming the kernel for a similar box. I've
already done most of what that recommends.
In sum, don't use the c3 specification in /etc/make.conf even though
the example would suggested otherwise.
Thanks all for your help
-j
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Re: CPUTYPE for VIA EPIA M-Series Mini-ITX
On 3/15/07, cpghost <[EMAIL PROTECTED]> wrote: On Wed, Mar 14, 2007 at 08:44:21PM -0500, Jeffrey Goldberg wrote: > I have one of these > > CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU) > Origin = "CentaurHauls" Id = 0x691 Stepping = 1 > Features=0x380b035 > > http://www.via.com.tw/en/products/mainboards/motherboards.jsp? > motherboard_id=81 > > And 6.2-RELEASE p2 > > When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build > just fine, but (at least) gcc ended up broken. Most compiling > attempts after that ended up with gcc reporting an internal error. > > Now that I've entered the FreeBSD world and am building everything > from source, I would like to take advantage of that by compiling for > my system. > > Does anyone have a similar system? And what CPUTYPE or local tuning > do you recommend? I have CPU: VIA C3 Samuel 2 (533.36-MHz 686-class CPU) Origin = "CentaurHauls" Id = 0x673 Stepping = 3 Features=0x803035 real memory = 528416768 (503 MB) running FreeBSD 6.2 without problems. The key here is NOT to set CPUTYPE in /etc/make.conf. Just use the defaults and you're fine. > A dmesg for the system is available at > > http://ntp0.goldmark.org/temp/dmesg > > Cheers, > > -j > > > -- > Jeffrey Goldberghttp://www.goldmark.org/jeff/ Regards, -cpghost. -- Cordula's Web. http://www.cordula.ws/ As cpghost said, there is no big difference when you make an optimization for the time being. You can also check http://gentoo-wiki.com/Safe_Cflags and see what cflag you can use with it. -- Regards, -Abdullah Ibn Hamad Al-Marri Arab Portal http://www.WeArab.Net/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: CPUTYPE for VIA EPIA M-Series Mini-ITX
On Thu, 15 Mar 2007 02:44:21 +0100, Jeffrey Goldberg <[EMAIL PROTECTED]> wrote: I have one of these CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU) Origin = "CentaurHauls" Id = 0x691 Stepping = 1 Features=0x380b035 And 6.2-RELEASE p2 When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build just fine, but (at least) gcc ended up broken. Most compiling attempts after that ended up with gcc reporting an internal error. Does anyone have a similar system? And what CPUTYPE or local tuning do you recommend? I have a Via Epia PD1 with the same CPU and use: CPUTYPE= i686 Although it does not seem to be mentioned in /usr/share/examples/etc/make.conf anymore (afaik i686==pentiumpro), it works just fine. Andreas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: CPUTYPE for VIA EPIA M-Series Mini-ITX
On Wed, Mar 14, 2007 at 08:44:21PM -0500, Jeffrey Goldberg wrote: > I have one of these > > CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU) > Origin = "CentaurHauls" Id = 0x691 Stepping = 1 > Features=0x380b035 > > http://www.via.com.tw/en/products/mainboards/motherboards.jsp? > motherboard_id=81 > > And 6.2-RELEASE p2 > > When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build > just fine, but (at least) gcc ended up broken. Most compiling > attempts after that ended up with gcc reporting an internal error. > > Now that I've entered the FreeBSD world and am building everything > from source, I would like to take advantage of that by compiling for > my system. > > Does anyone have a similar system? And what CPUTYPE or local tuning > do you recommend? I have CPU: VIA C3 Samuel 2 (533.36-MHz 686-class CPU) Origin = "CentaurHauls" Id = 0x673 Stepping = 3 Features=0x803035 real memory = 528416768 (503 MB) running FreeBSD 6.2 without problems. The key here is NOT to set CPUTYPE in /etc/make.conf. Just use the defaults and you're fine. > A dmesg for the system is available at > > http://ntp0.goldmark.org/temp/dmesg > > Cheers, > > -j > > > -- > Jeffrey Goldberghttp://www.goldmark.org/jeff/ Regards, -cpghost. -- Cordula's Web. http://www.cordula.ws/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
CPUTYPE for VIA EPIA M-Series Mini-ITX
I have one of these CPU: VIA C3 Nehemiah (999.52-MHz 686-class CPU) Origin = "CentaurHauls" Id = 0x691 Stepping = 1 Features=0x380b035 http://www.via.com.tw/en/products/mainboards/motherboards.jsp? motherboard_id=81 And 6.2-RELEASE p2 When I set CPUTYPE=c3 in /etc/make.conf the world seemed to build just fine, but (at least) gcc ended up broken. Most compiling attempts after that ended up with gcc reporting an internal error. Now that I've entered the FreeBSD world and am building everything from source, I would like to take advantage of that by compiling for my system. Does anyone have a similar system? And what CPUTYPE or local tuning do you recommend? A dmesg for the system is available at http://ntp0.goldmark.org/temp/dmesg Cheers, -j -- Jeffrey Goldberghttp://www.goldmark.org/jeff/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
