From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Shin Subject: Re: cpufreq & dual core CPUs. Date: Wed, 31 May 2006 00:05:15 -0500 Message-ID: <447D240B.6090507@gmail.com> References: <88056F38E9E48644A0F562A38C64FB60085E063E@scsmsx403.amr.corp.intel.com> <20060531045417.GA9439@redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20060531045417.GA9439@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" To: Dave Jones Cc: Andrew Morton , cpufreq@www.linux.org.uk Dave Jones wrote: > On Tue, May 30, 2006 at 09:40:37PM -0700, Pallipadi, Venkatesh wrote: > yes, sorry for omitting that, though I'm not sure this problem > is unique to Intel CPUs, though powernow-k8 does seem to have > some awareness of the cpu_core_map Yes, powernow-k8 will populate cpufreq_policy->cpus with cpu_core_map[] in order to communicate to cpufreq driver that the two cores are tied together in freq, and voltage. > Looking at that file on my core duo laptop, I see .. > > (00:47:47:davej@exile:~)$ cat /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus > 0 > (00:47:54:davej@exile:~)$ cat /sys/devices/system/cpu/cpu1/cpufreq/affected_cpus > 1 > > That implies to me that they're separate cores no? Are both cores on core-duos tied together? Then why not populate ->cpus with both of the cores set? -Jacob Shin AMD, Inc.