Which CPUTYPE in make.conf?
I have a AMD Athlon 4850e which is described as Athlon 64 X2 Dual-Core processor. /usr/share/examples/etc/make.conf lists recognised CPU types, but which of athlon64, athlon-mp or athlon-xp is the most appropriate for this CPU? I've been using athlon64 so far without any problems but I don't know if it's the most appropriate choice or if there's even any significant difference between them. -- Mike Clarke ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Which CPUTYPE in make.conf?
I deal with AMD Athlon 64 X2 4800+ Windsor (AM2, L2 2048Kb) and wondering of it's CPUTYPE too. 2010/4/24 Mike Clarke jmc-freeb...@milibyte.co.uk I have a AMD Athlon 4850e which is described as Athlon 64 X2 Dual-Core processor. /usr/share/examples/etc/make.conf lists recognised CPU types, but which of athlon64, athlon-mp or athlon-xp is the most appropriate for this CPU? I've been using athlon64 so far without any problems but I don't know if it's the most appropriate choice or if there's even any significant difference between them. -- Mike Clarke ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Which CPUTYPE in make.conf?
Mike Clarke wrote: I have a AMD Athlon 4850e which is described as Athlon 64 X2 Dual-Core processor. /usr/share/examples/etc/make.conf lists recognised CPU types, but which of athlon64, athlon-mp or athlon-xp is the most appropriate for this CPU? I've been using athlon64 so far without any problems but I don't know if it's the most appropriate choice or if there's even any significant difference between them. athlon64 is probably a good choice. I haven't looked at it in a while, and there isn't much difference. IIRC the older athlon-xp included support for 3D Now and mmx while the athlon64 adds sse and/or sse2. I think this matters more to third party ports software builds than it does the system. I thought that large pieces of the kernel were designed to not make much, if any, use the various SIMD extensions. Maybe this has changed and I'm behind the times. Your use of athlon64 seems reasonable to me. It is what I've been using. If it can be done better I'm always on the look out for better. -Mike ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Which CPUTYPE in make.conf?
On Sat, Apr 24, 2010 at 7:32 PM, Michael Powell nightre...@hotmail.com wrote: I think this matters more to third party ports software builds than it does the system. I thought that large pieces of the kernel were designed to not make much, if any, use the various SIMD extensions. Maybe this has changed and I'm behind the times. I wouldn't bother setting CPUTYPE at all. It's more trouble than it's worth. And you're right: for most ports and for the whole system, it doesn't really matter. If you have a very specific port that needs particular tuning, it has either already been tuned individually by the port maintainer, or you could apply more optimizations yourself (which would likely require a specially compiled tool chain, when -Osomething with the base gcc/binutils isn't enough). Unless you have a very specific need, better leave CPUTYPE alone. Your use of athlon64 seems reasonable to me. It is what I've been using. If it can be done better I'm always on the look out for better. -Mike -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 freebsd-questions-unsubscr...@freebsd.org
Re: Which CPUTYPE in make.conf?
C. P. Ghost wrote: On Sat, Apr 24, 2010 at 7:32 PM, Michael Powell nightre...@hotmail.com wrote: I think this matters more to third party ports software builds than it does the system. I thought that large pieces of the kernel were designed to not make much, if any, use the various SIMD extensions. Maybe this has changed and I'm behind the times. I wouldn't bother setting CPUTYPE at all. It's more trouble than it's worth. Actually, I've been setting CPUTYPE for many years and have never had any trouble as a result. I've always used the form: CPUTYPE?= blah instead of CPUTYPE= without the question mark. And you're right: for most ports and for the whole system, it doesn't really matter. If you have a very specific port that needs particular tuning, it has either already been tuned individually by the port maintainer, or you could apply more optimizations yourself (which would likely require a specially compiled tool chain, when -Osomething with the base gcc/binutils isn't enough). I have also used CFLAGS= -O2 -pipe COPTFLAGS= -O2 -pipe. About the only place it will really make any difference is in some multimedia apps. And you're right that if needed the port maintainer has already taken care of this. Unless you have a very specific need, better leave CPUTYPE alone. Thing is, any performance increase is only going to be very small. So small the difference can probably not be seen subjectively. I'll do it as long as it creates no problem; if any problem were to arise over this I'd kill it in a heartbeat and not fuss over it. It is a point of diminishing returns. [snip] -Mike ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
which cputype for Althon 64 X2 Dual Core
I'm building a new server with 7.0 BETA4 (it will track stable) with the following CPU CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ (2600.02-MHz K8- class CPU) Origin = AuthenticAMD Id = 0x60fb1 Stepping = 1 Features = 0x178bfbff FPU ,VME ,DE ,PSE ,TSC ,MSR ,PAE ,MCE ,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT Features2=0x2001SSE3,CX16 AMD Features=0xea500800SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+, 3DNow! AMD Features2=0x11fLAHF,CMP,SVM,ExtAPIC,CR8,Prefetch Cores per package: 2 What optimizations should I make in make.conf? The example make.conf says AMD64 architecture: opteron, athlon64, nocona, prescott, core2 But I don't know whether althon64 or core2 would be the safest and most appropriate. Also GENERIC for amd64 lists cpuHAMMER is that the best (only) choice? And if not, where can I find a list of alternatives? I didn't find anything in the NOTES files telling me what was available. -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]
Re: which cputype for Althon 64 X2 Dual Core
On Dec 21, 2007, at 4:33 PM, Jeffrey Goldberg wrote: I'm building a new server with 7.0 BETA4 (it will track stable) with the following CPU CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ (2600.02-MHz K8- class CPU) [ ... ] What optimizations should I make in make.conf? A reasonable starting point is no special optimizations, and simply disable debug options like WITNESS, INVARIANTS, etc. If you plan to go beyond that, you'll need to start by doing some benchmarks before and after setting something like the CPU architecture that the compiler should tune for, and see whether you actually get any significant differences. The example make.conf says AMD64 architecture: opteron, athlon64, nocona, prescott, core2 But I don't know whether althon64 or core2 would be the safest and most appropriate. Also GENERIC for amd64 lists cpuHAMMER is that the best (only) choice? Yes, as far as AMD64 code goes. You could always switch down to running in 32-bit mode, though. -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: which cputype for Althon 64 X2 Dual Core
First of all, thank you very much for your response. I have some follow up questions below. On Dec 21, 2007, at 6:45 PM, Chuck Swiger wrote: On Dec 21, 2007, at 4:33 PM, Jeffrey Goldberg wrote: What optimizations should I make in make.conf? A reasonable starting point is no special optimizations, and simply disable debug options like WITNESS, INVARIANTS, etc. I didn't see mention of these in the example make.conf so I don't know how to disable those if they are enabled in the first place. If you plan to go beyond that, you'll need to start by doing some benchmarks [...] I'm after the low hanging fruit and I don't really have the inclination to do such extensive tuning. I was just wondering if there is anything obvious. The example make.conf says AMD64 architecture: opteron, athlon64, nocona, prescott, core2 But I don't know whether althon64 or core2 would be the safest and most appropriate. Also GENERIC for amd64 lists cpuHAMMER is that the best (only) choice? Yes, as far as AMD64 code goes. You could always switch down to running in 32-bit mode, though. That answer the question for the kernel configuration. But what should I put in make.conf as cputype? Right now, I've just left it unspecified. I started a make buildworld and was surprised to see that it is using -O2 -fno-strict-aliasing -pipe even though I didn't tell it to do so. -O2 sounds like an odd default when it appears to be recommended against. Where should I look for the defaults? Cheers, -j ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Which CPUTYPE?
Kiffin Gish [EMAIL PROTECTED] writes: I have the following configuration: CPU: AMD Sempron(tm) Processor 3100+ (1800.08-MHz 686-class CPU) Origin = AuthenticAMD Id = 0xfc0 Stepping = 0 Features=0x78bfbffFPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA, CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2 AMD Features=0xc050NX,AMIE,DSP,3DNow! What CPUTYPE do I define in: You don't need to change the defaults at all, you know. It's not like you're likely to *notice* any difference. And the specific answers depend on the version of FreeBSD you are running. - make.conf man make.conf and search for CPUTYPE. It will point you at a sample or default configuration file. - kernel config man 5 config and search for cpu. You'll want the 686 version according to that dmesg output. On -STABLE (at least; I think this is true on all versions, but I'm not sure), that is I686_CPU. In any case, it will already be in your configuration file (or GENERIC), and you just need to remove the others in your config file. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Which CPUTYPE?
I have the following configuration: CPU: AMD Sempron(tm) Processor 3100+ (1800.08-MHz 686-class CPU) Origin = AuthenticAMD Id = 0xfc0 Stepping = 0 Features=0x78bfbffFPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA, CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2 AMD Features=0xc050NX,AMIE,DSP,3DNow! What CPUTYPE do I define in: - make.conf - kernel config Thankls a lot in advance. -- Kiffin Rex Gish Gouda, The Netherlands ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Which CPUTYPE?
I'm a bit confused which CPUTYPE I should be using in the make.conf file. For my Dell Inspiron 8200 laptop, dmesg shows the following: CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1993.54 686-class CPU) and for my web server, dmesg shows the same thing although is has a AMD Sempron 1800BOX3100+ I see in the documentation that CPUTYPE=i686 is for older Pentium types, so does that mean I should use CPUTYPE=i686 (even though dmesg shgows '686-class CPU') And my kernel file then? cpu I686_CPU or I586_CPU. What should I use for my laptop? For my web server? Thanks a lot in advance. -- Kiffin Rex Gish Gouda, The Netherlands ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Which CPUTYPE?
try the cpucaps,which is good for check your cpu abilities. On 9/13/05, Kiffin Gish [EMAIL PROTECTED] wrote: I'm a bit confused which CPUTYPE I should be using in the make.conf file. For my Dell Inspiron 8200 laptop, dmesg shows the following: CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1993.54 686-class CPU) and for my web server, dmesg shows the same thing although is has a AMD Sempron 1800BOX3100+ I see in the documentation that CPUTYPE=i686 is for older Pentium types, so does that mean I should use CPUTYPE=i686 (even though dmesg shgows '686-class CPU') And my kernel file then? cpu I686_CPU or I586_CPU. What should I use for my laptop? For my web server? Thanks a lot in advance. -- Kiffin Rex Gish Gouda, The Netherlands ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Which CPUTYPE?
or if you can access a windows install, use cpuz do it On 9/13/05, Kiffin Gish [EMAIL PROTECTED] wrote: I'm a bit confused which CPUTYPE I should be using in the make.conf file. For my Dell Inspiron 8200 laptop, dmesg shows the following: CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1993.54 686-class CPU) and for my web server, dmesg shows the same thing although is has a AMD Sempron 1800BOX3100+ I see in the documentation that CPUTYPE=i686 is for older Pentium types, so does that mean I should use CPUTYPE=i686 (even though dmesg shgows '686-class CPU') And my kernel file then? cpu I686_CPU or I586_CPU. What should I use for my laptop? For my web server? Thanks a lot in advance. -- Kiffin Rex Gish Gouda, The Netherlands ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Which CPUTYPE?
On Sep 12, 2005, at 1:58 PM, Kiffin Gish wrote: CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1993.54 686- class CPU) and for my web server, dmesg shows the same thing although is has a AMD Sempron 1800BOX3100+ I see in the documentation that CPUTYPE=i686 is for older Pentium types, so does that mean I should use CPUTYPE=i686 (even though dmesg shgows '686-class CPU') And my kernel file then? cpu I686_CPU or I586_CPU. What should I use for my laptop? For my web server? Both of your machines are 686-class machines, using -mpentium or - mpentiumpro would be fine. There is an advantage to not compiling the kernel with 386 and 486 suppport, but after that the difference between 586 and 686 is fairly minimal -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
