From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ryan Harper <ryanh@us.ibm.com>
Subject: Re: Is there an equivalent to logical_proc_id[] ?
Date: Mon, 20 Jun 2005 14:28:03 -0500
Message-ID: <20050620192803.GD867@us.ibm.com>
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To: "Santos, Jose Renato G" <joserenato.santos@hp.com>
Cc: "Turner, Yoshio" <yoshio_turner@hp.com>, Aravind Menon <aravind.menon@epfl.ch>, xen-devel@lists.xensource.com, G John Janakiraman <john@arivalai.hpl.hp.com>
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* Santos, Jose Renato G <joserenato.santos@hp.com> [2005-06-20 14:10]:
> 
>   Hi,
> 
>   I am trying to port xenoprof to the latest version of xen-unstable
>   and noticed the variable "logical_proc_id[]" that used to be defined
>   in setup.c is gone. I spent sometime trying to find an equivalent
>   variable/function without success.
>  
>   Does anyone know a simple way of determining the logical CPU id in
>   a given physical CPU (i.e an id in the range [0,smp_num_siblings-1])?
> 
>   Thanks in advance for any help
> 
>   Renato
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

I used the cpuid_apic id which I found in arch/i386/kernel/cpu/common.c
in the detech_ht() routine.

   unsigned int logical_proc_id;
   u32   eax, ebx, ecx, edx;

   cpuid(1, &eax, &ebx, &ecx, &edx);
   logical_proc_id = (ebx >> 24 & 0xff) & 1;


That worked for me when I was trying to get xenoprof to build/work
against unstable tree.


-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh@us.ibm.com