Wei Huang
2011-Jun-23 22:52 UTC
[Xen-devel] [PATCH][RFC][2/2] x86 SMP: enables core-pair topology detection for AMD CPUs
x86: AMD core-pair topology detection code This patch is to support core-pair topology introduced by AMD CPUs, which introduces a new concept of [core, compute unit]. There is a new feature bit for topology extension in CPUID:0x80000001. Also a new CPUID 0x8000001E is introduced for CPU topology enumeration. This patch collects the sibling information from the new CPUID and will be stored in the sibling map in Xen hypervisor. Signed-off-by: Wei Huang <wei.huang2@amd.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
George Dunlap
2011-Jun-27 11:10 UTC
[Xen-devel] Re: [PATCH][RFC][2/2] x86 SMP: enables core-pair topology detection for AMD CPUs
On Thu, 2011-06-23 at 23:52 +0100, Wei Huang wrote:> x86: AMD core-pair topology detection code > > This patch is to support core-pair topology introduced by AMD CPUs, > which introduces a new concept of [core, compute unit]. There is a new > feature bit for topology extension in CPUID:0x80000001. Also a new CPUID > 0x8000001E is introduced for CPU topology enumeration. This patch > collects the sibling information from the new CPUID and will be stored > in the sibling map in Xen hypervisor. > > Signed-off-by: Wei Huang <wei.huang2@amd.com> > >Can''t comment on the code itself (not my area), but wrt to effects it will have on the Xen scheduler: Acked-by: George Dunlap <george.dunlap@eu.citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel