Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Ceri Davies
On Mon, Jan 27, 2003 at 11:33:02PM -0500, Adam Migus wrote: Hi, I'm doing some performance analysis on FreeBSD. I would like to be able to make an SMP kernel use only one CPU. Of course I realize running GENERIC would only use 1 CPU but the concern is that the overhead assoicated with SMP

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Odhiambo Washington
* Ceri Davies [EMAIL PROTECTED] [20030128 12:50]: wrote: On Mon, Jan 27, 2003 at 11:33:02PM -0500, Adam Migus wrote: Hi, I'm doing some performance analysis on FreeBSD. I would like to be able to make an SMP kernel use only one CPU. Of course I realize running GENERIC would only use 1

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread leafy
On Tue, Jan 28, 2003 at 12:53:49PM +0300, Odhiambo Washington wrote: that the overhead assoicated with SMP will skew the statistics. So my question is what would be the 'best' way to make an SMP kernel only start/use CPU0? Yank the others ? What about building two kernels, one

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Juli Mallett
* De: Odhiambo Washington [EMAIL PROTECTED] [ Data: 2003-01-28 ] [ Subjecte: Re: Force 1 CPU on SMP kernel? ] * Ceri Davies [EMAIL PROTECTED] [20030128 12:50]: wrote: On Mon, Jan 27, 2003 at 11:33:02PM -0500, Adam Migus wrote: Hi, I'm doing some performance analysis on FreeBSD. I

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Adam Migus
quote who=Juli Mallett * De: Odhiambo Washington [EMAIL PROTECTED] [ Data: 2003-01-28 ] [ Subjecte: Re: Force 1 CPU on SMP kernel? ] * Ceri Davies [EMAIL PROTECTED] [20030128 12:50]: wrote: On Mon, Jan 27, 2003 at 11:33:02PM -0500, Adam Migus wrote: Hi, I'm doing some

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Andre Guibert de Bruet
On Tue, 28 Jan 2003, Adam Migus wrote: Yes, just to be more explicit. What I want to do is get the 'real' difference a second processor makes. ie. If I run GENERIC I'm not incurring the overhead associated with SMP/APIC. I want to use the same kernel making as small a change as

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Craig Rodrigues
Hi, Does FreeBSD-SMP have anything equivalent to the processor_bind(2) call on Solaris, which binds a process to a specific processor? http://docs.sun.com/db/doc/816-0212/6m6nd4nci?a=view -- Craig Rodrigues http://home.attbi.com/~rodrigc [EMAIL PROTECTED] To Unsubscribe: send mail to

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Wilko Bulte
On Tue, Jan 28, 2003 at 12:33:32PM -0500, Andre Guibert de Bruet wrote: On Tue, 28 Jan 2003, Adam Migus wrote: Yes, just to be more explicit. What I want to do is get the 'real' difference a second processor makes. ie. If I run GENERIC I'm not incurring the overhead associated with

Re: Force 1 CPU on SMP kernel?

2003-01-28 Thread Adam Migus
quote who=Andre Guibert de Bruet On Tue, 28 Jan 2003, Adam Migus wrote: Yes, just to be more explicit. What I want to do is get the 'real' difference a second processor makes. ie. If I run GENERIC I'm not incurring the overhead associated with SMP/APIC. I want to use the same kernel

Force 1 CPU on SMP kernel?

2003-01-27 Thread Adam Migus
Hi, I'm doing some performance analysis on FreeBSD. I would like to be able to make an SMP kernel use only one CPU. Of course I realize running GENERIC would only use 1 CPU but the concern is that the overhead assoicated with SMP will skew the statistics. So my question is what would be the