Re: [LinuxBIOS] dual core disable?

[Lu, Yinghai]

That bit is cleared default, and if you don't want to dual core, you
don't need to set it....

YH

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Greg Johnson
Sent: Monday, November 07, 2005 4:03 PM
To: Lu, Yinghai
Cc: Greg Johnson; [e-mail]
Subject: Re: [LinuxBIOS] dual core disable?

BTW, How come you don't use the CPU1 Enable (Cpu1En) bit to disable the
second core?

Greg

On Mon, Nov 07, 2005 at 03:55:01PM -0800, Lu, Yinghai wrote:
> OK,
>
> We may need to set the nbcfg 54 bit even disable the dual core.
>
> Please several lines
> src/cpu/dualcore/dualcore.c
>
> //If(read_option(CMOS_VSTART_dual_core.....
> 2. in you cache_as_ram_auto.c
> //#if CONFIG_LOGICAL_CPUS == 1
>    Set_apicid_cpuid_lo();
> //#endif
>
> YH
>
> -----Original Message-----
> From: Greg Johnson [mailto:[e-mail]] 
> Sent: Monday, November 07, 2005 3:37 PM
> To: Lu, Yinghai
> Cc: Ronald G Minnich; Greg Johnson; [e-mail]
> 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
>
> Greg