Date: Mon, 26 May 2008 20:19:28 +0200 From: Jos Chrispijn <jos@webrz.net> To: freebsd-questions@freebsd.org Subject: Re: Kernel for Dual Core Message-ID: <483AFF30.2090108@webrz.net> In-Reply-To: <483AF28F.1080102@magichamster.com> References: <483ADEA1.40206@webrz.net> <483AE57B.2000106@magichamster.com> <483AEB21.4070100@webrz.net> <483AF28F.1080102@magichamster.com>
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Mark,
Mark Ovens wrote:
> The reason that nothing is #'d out and just about everything is in
> GENERIC is because it is exactly that, a *generic* kernel, and soo
> needs to be able to boot on any hardware it's installed on.
Oke, now I understand.
> The advantage of building a custom kernel is that you remove anything
> your system doesn't have which saves time when booting as the kernel
> won't be probing for devices that it will never find - for example.
> mine is an all-SCSI system so my kernel doesn't have any IDE or floppy
> devices in it - and it makes the kernel smaller (although that isn't
> really an issue these days).
With this speed that shouldn't be a problem...
> An alternative is to go into the configuration editor from the main
> boot menu and disable those compiled-in devices that you don't have.
That I didn't know!
> To confirm that your running kernel has detected and started both CPUs:
>
> /home/mark{8}% grep -i cpu /var/log/messages
>
> May 26 12:10:30 redshift kernel: CPU: AMD Athlon(TM) MP 2800+
> (2133.42-MHz 686-class CPU)
> May 26 12:10:30 redshift kernel: FreeBSD/SMP: Multiprocessor System
> Detected: 2 CPUs
> May 26 12:10:30 redshift kernel: cpu0 (BSP): APIC ID: 0
> May 26 12:10:30 redshift kernel: cpu1 (AP): APIC ID: 1
> May 26 12:10:30 redshift kernel: cpu0: <ACPI CPU> on acpi0
> May 26 12:10:30 redshift kernel: cpu1: <ACPI CPU> on acpi0
> May 26 12:10:30 redshift kernel: SMP: AP CPU #1 Launched!
> /home/mark{9}%
I did this on my systems on which I installed FreeBSD from iso CD's:
May 25 17:23:44 triton kernel: FreeBSD/SMP: Multiprocessor System
Detected: 2 CPUs
May 25 17:23:44 triton kernel: cpu0 (BSP): APIC ID: 0
May 25 17:23:44 triton kernel: cpu1 (AP): APIC ID: 1
May 25 17:23:44 triton kernel: cpu0: <ACPI CPU> on acpi0
May 25 17:23:44 triton kernel: est0: <Enhanced SpeedStep Frequency
Control> on cpu0
May 25 17:23:44 triton kernel: p4tcc0: <CPU Frequency Thermal Control>
on cpu0
May 25 17:23:44 triton kernel: cpu1: <ACPI CPU> on acpi0
May 25 17:23:44 triton kernel: est1: <Enhanced SpeedStep Frequency
Control> on cpu1
May 25 17:23:44 triton kernel: p4tcc1: <CPU Frequency Thermal Control>
on cpu1
May 25 17:23:44 triton kernel: SMP: AP CPU #1 Launched!
So this would mean that I allready use a dual core tuned system?
When should it say SMP: AP CPU #2 Launched! ?
Thanks for sharing,
Jos
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