From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Starikovskiy Subject: Re: Pentium D 915 support Date: Thu, 03 Aug 2006 19:29:42 +0400 Message-ID: <44D21666.5030304@linux.intel.com> References: <1154265136.21063.10.camel@skylla.slagter.name> <44CCD154.3080606@linux.intel.com> <1154275129.21063.31.camel@skylla.slagter.name> <1154605493.4302.494.camel@queen.suse.de> <1154605725.14206.22.camel@localhost> <1154617009.4302.515.camel@queen.suse.de> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1154617009.4302.515.camel@queen.suse.de> 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=gmane.org+glkc-cpufreq=gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" To: trenn@suse.de Cc: cpufreq@lists.linux.org.uk Thomas, please stop misinforming... Thomas Renninger wrote: > On Thu, 2006-08-03 at 13:48 +0200, Erik Slagter wrote: >> On do, 2006-08-03 at 13:44 +0200, Thomas Renninger wrote: >>>> Please note the amount of repeated same frequency. >>> I already saw something similar. >>> This is BIOS information, they probably want to take care that no >>> performance is lost and define 9 high and one low step. >> What do you mean? > available frequency steps: 2.80 GHz, 2.80 GHz, 2.80 GHz, 2.80 GHz, 2.80 > GHz, 2.80 GHz, 2.80 GHz, 2.80 GHz, 2.80 GHz, 2.40 GHz > > They define 9 2.8 GHz frequency steps and one 2.4 GHz. > That means if OS is going down with speed step by step it will take a > while until you reach 2.4 GHz. Algorithm does not care about same P-steps. It will get to 2.4 in one step. > This could be intended (avoid possible performance losses), but also > just be a BIOS bug. This is not BIOS bug, it is just a way to avoid dynamic memory allocation in BIOS. And it has nothing to do with performance losses due to note above. >>>> Last but not least: the loading or unloading of the module doesn't have >>>> any effect on the actual power consumption, even with powersave governor >>>> and both cores at 2.4 Ghz (both at 140 W). >>> Strange. 2.4 GHz is still a lot? >>> >>> Have you already searched for a new BIOS, if not better do that first. >> The only difference between my BIOS version and the one available for >> download is the support for "new cpu's" according to the ASUS website. > No idea whether it helps, but I would give it a try. > > Maybe you find some specs on the Intel site what speed steps should be > supported and how many power/temperature gain you can get. 2.4 GHz > doesn't sound like you save a lot of energy... Lowest frequency for P4 is 2.8 Ghz (14xFSB), PD is 2.4 (12xFSB), Core is 6x, but FSB is much higher. Regards, Alex.