[LinuxBIOS] dual core disable?

Lu, Yinghai yinghai.lu at amd.com
Tue Nov 8 01:33:08 CET 2005

Northbridge.c cpu_bus_scan need to be modified too, you need to assume
the CONFIG_LOGICAL_CPU==1 there..


-----Original Message-----
From: linuxbios-bounces at openbios.org
[mailto:linuxbios-bounces at openbios.org] On Behalf Of Lu, Yinghai
Sent: Monday, November 07, 2005 3:55 PM
To: Greg Johnson
Cc: linuxbios at openbios.org
Subject: Re: [LinuxBIOS] dual core disable?


We may need to set the nbcfg 54 bit even disable the dual core.

Please several lines
1. src/cpu/dualcore/dualcore.c 
2. in you cache_as_ram_auto.c


-----Original Message-----
From: Greg Johnson [mailto:gjohnson at lanl.gov] 
Sent: Monday, November 07, 2005 3:37 PM
To: Lu, Yinghai
Cc: Ronald G Minnich; Greg Johnson; linuxbios at openbios.org
Subject: Re: [LinuxBIOS] dual core disable?

On Mon, Nov 07, 2005 at 03:00:09PM -0800, Lu, Yinghai wrote:
> ?
> In Normal BIOS, is there option to disable dual core?

No.  I'm pretty sure that I'm really getting two cores on one socket.
Memory bandwidth is affected when running on both cores.  In any case,
Linux K8 NUMA is confused:

p5:~# numactl --show
policy: default
preferred node: current
cpubind: 0
membind: 0 1


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