Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
On Thursday 16 November 2006 01:00, Mark M wrote: Hi all, Pentium D is actually an emt64 dual core cpu, so while CFLAGS -march=pentium4 will work, it will be x86-32 instead of x86-64 and of course the compiled apps won't know nothing about the dual core (read almost dual CPU), still it will run, and it will run fast, you may want to recompile the kernel on the data center with vSMP option set, so at least the kernel will know how to manage multithreads between two cores. In that case he should be cross-compiling with a CHOST set for the PentiumD, not so? alan -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
On 11/16/06, Alan McKinnon [EMAIL PROTECTED] wrote: On Thursday 16 November 2006 01:00, Mark M wrote: Hi all, Pentium D is actually an emt64 dual core cpu, so while CFLAGS -march=pentium4 will work, it will be x86-32 instead of x86-64 and of course the compiled apps won't know nothing about the dual core (read almost dual CPU), still it will run, and it will run fast, you may want to recompile the kernel on the data center with vSMP option set, so at least the kernel will know how to manage multithreads between two cores. In that case he should be cross-compiling with a CHOST set for the PentiumD, not so? alan -- gentoo-user@gentoo.org mailing list Yes, he can do so, but he won't be able to test run his apps. And judging from my experience there isn't much difference between apps compiled for x86-32 or x86-64, however compiling the kernel for right cpu speed up things, especially multithreaded.
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Mark M wrote: On 11/16/06, *Alan McKinnon* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: On Thursday 16 November 2006 01:00, Mark M wrote: Hi all, Pentium D is actually an emt64 dual core cpu, so while CFLAGS -march=pentium4 will work, it will be x86-32 instead of x86-64 and of course the compiled apps won't know nothing about the dual core (read almost dual CPU), still it will run, and it will run fast, you may want to recompile the kernel on the data center with vSMP option set, so at least the kernel will know how to manage multithreads between two cores. In that case he should be cross-compiling with a CHOST set for the PentiumD, not so? alan -- gentoo-user@gentoo.org mailto:gentoo-user@gentoo.org mailing list Yes, he can do so, but he won't be able to test run his apps. And judging from my experience there isn't much difference between apps compiled for x86-32 or x86-64, however compiling the kernel for right cpu speed up things, especially multithreaded. Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Did your actual system install on your Pentium D is in 64 bits ? Le Thu, 16 Nov 2006 15:45:02 +0100, Jon M [EMAIL PROTECTED] a écrit: Mark M wrote: On 11/16/06, *Alan McKinnon* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: On Thursday 16 November 2006 01:00, Mark M wrote: Hi all, Pentium D is actually an emt64 dual core cpu, so while CFLAGS -march=pentium4 will work, it will be x86-32 instead of x86-64 and of course the compiled apps won't know nothing about the dual core (read almost dual CPU), still it will run, and it will run fast, you may want to recompile the kernel on the data center with vSMP option set, so at least the kernel will know how to manage multithreads between two cores. In that case he should be cross-compiling with a CHOST set for the PentiumD, not so? alan -- gentoo-user@gentoo.org mailto:gentoo-user@gentoo.org mailing list Yes, he can do so, but he won't be able to test run his apps. And judging from my experience there isn't much difference between apps compiled for x86-32 or x86-64, however compiling the kernel for right cpu speed up things, especially multithreaded. Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. ___ Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses http://fr.answers.yahoo.com -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Geistteufel wrote: Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. Did your actual system install on your Pentium D is in 64 bits ? The OS is installed on a regular Pentium 4 (32bit), but will be installed on a Pentium D that can run 64bit, but will be sticking with 32bit. Is that what you wanted to know? -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. -- gentoo-user@gentoo.org mailing list x86-32 will be the lowest common settings for all 32bit cpus. so pentium4 is the setting I believe you should use. I can tell you from my experience, since I use PentiumD cpu, that recompiling with -march=prescott gave me better performance then -marh=x86-32, especially in disk intensive and multimedia applications, such as video encoding and large database access.
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Mark M wrote: Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. -- gentoo-user@gentoo.org mailto:gentoo-user@gentoo.org mailing list x86-32 will be the lowest common settings for all 32bit cpus. so pentium4 is the setting I believe you should use. I can tell you from my experience, since I use PentiumD cpu, that recompiling with -march=prescott gave me better performance then -marh=x86-32, especially in disk intensive and multimedia applications, such as video encoding and large database access. Hi Mark, Thanks for the tip! I'll be sure to switch my CFLAGS to that. I might as well make the system run as fast as it possibly can. What did you set your MAKEOPTS to? I was thinking -j3 because of the two cores plus one. Did you do the same? -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
The system you would replace, is on the Pentium D ? I don't remember the distro name, but not the gentoo one. So if Pentium D contain 64 bits distro you would replace by gentoo ... they is a solution to compile it directly on this computer in 64 bits, so after just replace the main system with a rescue If not ... you can copy the system on your pentium 4 ... replace your prod for a moment, take the pentium D and install a 64 bits gentoo version ... so replace your prod with 64 bits version ... a sort of double switch you see ? Le Thu, 16 Nov 2006 16:04:20 +0100, Jon M [EMAIL PROTECTED] a écrit: Geistteufel wrote: Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. Did your actual system install on your Pentium D is in 64 bits ? The OS is installed on a regular Pentium 4 (32bit), but will be installed on a Pentium D that can run 64bit, but will be sticking with 32bit. Is that what you wanted to know? ___ Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses http://fr.answers.yahoo.com -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
On 11/16/06, Jon M [EMAIL PROTECTED] wrote: Mark M wrote: Hi Mark, I actually wasn't planning on using 64bit anyway I'm wondering if I should set my CFLAGS to -march=x86-32 or leave it as -march=pentium4? Are they essentially the same? I already took your previous suggestion and enabled vSMP support, though I haven't moved the drive to it's new home as of yet. -- gentoo-user@gentoo.org mailto:gentoo-user@gentoo.org mailing list x86-32 will be the lowest common settings for all 32bit cpus. so pentium4 is the setting I believe you should use. I can tell you from my experience, since I use PentiumD cpu, that recompiling with -march=prescott gave me better performance then -marh=x86-32, especially in disk intensive and multimedia applications, such as video encoding and large database access. Hi Mark, Thanks for the tip! I'll be sure to switch my CFLAGS to that. I might as well make the system run as fast as it possibly can. What did you set your MAKEOPTS to? I was thinking -j3 because of the two cores plus one. Did you do the same? -- gentoo-user@gentoo.org mailing list yes my MAKEOPTS are -j3 indeed :)
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
On 11/16/06, Jon M [EMAIL PROTECTED] wrote: What did you set your MAKEOPTS to? I was thinking -j3 because of the two cores plus one. Did you do the same? I suggest MAKEOPTS=-j3 if you have at least 2G of RAM in the box. If only 1G, MAKEOPTS=-j2. If less, -j1. You can also change this after you move the drive over. -Richard -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Well, I do this often time You can compile on one computer and put the drive to another without any problem If your both computer have the same material ... nothing to do Well CFGLAS on P4 should be like -02 -march=p4 -pipe -fmoit-frame-pointer so both are P4, you can switch easyly if both haven't got same material and you don't use genkernel you should probably redo the kernel if you hd are not at the same place on new computer you need to change fstab but globally, they don't take more than half an hour good luck Le Wed, 15 Nov 2006 17:15:35 +0100, Jon M [EMAIL PROTECTED] a écrit: Hey again everyone, Here is my situation: I have CentOS running on a system in a datacenter, but want to switch to Gentoo. Basically what I've started to do is installed Gentoo on a P4 3.0Ghz machine at home, and plan on moving it to a Pentium D 2.66Ghz. Now if I configure/compile/install all my software on the P4, and the kernel is configured for all the hardware in the other machine, will it magically work, or will it freak out? My other concern is that maybe the applications won't be optimized for the other machine. If this is the case, once it's down there, could I simply emerge all of my programs one at a time? My reason for doing this is to minimize downtime. I didn't want to take the server offline for a week while I take my time configuring a new setup. This way it should only be down for maybe 5 minutes while I do a hard drive swap. Thanks in advance for anyones thoughts on this. ___ Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses http://fr.answers.yahoo.com -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
On Wednesday 15 November 2006 18:15, Jon M wrote: Hey again everyone, Here is my situation: I have CentOS running on a system in a datacenter, but want to switch to Gentoo. Basically what I've started to do is installed Gentoo on a P4 3.0Ghz machine at home, and plan on moving it to a Pentium D 2.66Ghz. Now if I configure/compile/install all my software on the P4, and the kernel is configured for all the hardware in the other machine, will it magically work, or will it freak out? My other concern is that maybe the applications won't be optimized for the other machine. If this is the case, once it's down there, could I simply emerge all of my programs one at a time? My reason for doing this is to minimize downtime. I didn't want to take the server offline for a week while I take my time configuring a new setup. This way it should only be down for maybe 5 minutes while I do a hard drive swap. Thanks in advance for anyones thoughts on this. The one thing you *have* to do is configure the kernel on the compiling machine for the correct hardware that the date center machine has. There's no magic involved, when you boot into the new machine the driver for it's hardware is either there or it isn't. You probably also want to set your CFLAGS to the lowest common denominator cpu - I don't recall off-hand what a Pentium D is, but I imagine the setting will be -march=pentium4. This will avoid the problem of code being compiled with cpu settings that are not present on the target system. And don't worry too much about optimization. We have a word for that - it's called ricing and it's not a good thing. Compile the apps with sane settings and stuff works. Trying to eke out those last 4 cpu cycles just ain't worth the effort... If you need better performance, buy more RAM or faster disks alan -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Install Gentoo on one machine, then move the drive to another
Hi all, Pentium D is actually an emt64 dual core cpu, so while CFLAGS -march=pentium4 will work, it will be x86-32 instead of x86-64 and of course the compiled apps won't know nothing about the dual core (read almost dual CPU), still it will run, and it will run fast, you may want to recompile the kernel on the data center with vSMP option set, so at least the kernel will know how to manage multithreads between two cores. On 11/15/06, Alan McKinnon [EMAIL PROTECTED] wrote: On Wednesday 15 November 2006 18:15, Jon M wrote: Hey again everyone, Here is my situation: I have CentOS running on a system in a datacenter, but want to switch to Gentoo. Basically what I've started to do is installed Gentoo on a P4 3.0Ghz machine at home, and plan on moving it to a Pentium D 2.66Ghz. Now if I configure/compile/install all my software on the P4, and the kernel is configured for all the hardware in the other machine, will it magically work, or will it freak out? My other concern is that maybe the applications won't be optimized for the other machine. If this is the case, once it's down there, could I simply emerge all of my programs one at a time? My reason for doing this is to minimize downtime. I didn't want to take the server offline for a week while I take my time configuring a new setup. This way it should only be down for maybe 5 minutes while I do a hard drive swap. Thanks in advance for anyones thoughts on this. The one thing you *have* to do is configure the kernel on the compiling machine for the correct hardware that the date center machine has. There's no magic involved, when you boot into the new machine the driver for it's hardware is either there or it isn't. You probably also want to set your CFLAGS to the lowest common denominator cpu - I don't recall off-hand what a Pentium D is, but I imagine the setting will be -march=pentium4. This will avoid the problem of code being compiled with cpu settings that are not present on the target system. And don't worry too much about optimization. We have a word for that - it's called ricing and it's not a good thing. Compile the apps with sane settings and stuff works. Trying to eke out those last 4 cpu cycles just ain't worth the effort... If you need better performance, buy more RAM or faster disks alan -- gentoo-user@gentoo.org mailing list
