From mboxrd@z Thu Jan 1 00:00:00 1970 From: Prantik Kundu Subject: P-M, ICH4 ACPI performance and throttling states and auto-switching, and hard drive standby-ing Date: Fri, 16 Jan 2004 19:28:02 -0500 Sender: cpufreq-bounces+glkc-cpufreq=gmane.org@www.linux.org.uk Message-ID: <1074299282.547.9.camel@3piece> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: cpufreq-bounces+glkc-cpufreq=gmane.org@www.linux.org.uk Content-Type: text/plain; charset="us-ascii" To: cpufreq@www.linux.org.uk Hi. I have an IBM T40 P-M 1.6 with ICH4, I'm running 2.4.23 and have applied the latest ACPI patch which included ACPI CA, so, I can change both performance states and throttling states effectively I have some questions and concerns: Whats the difference between throttling and P-states? It seems that each P-state has n T-states (where n=8 in my case), because I can slow my system down so far gnome crawls, and then speed it up fast enough that my kernel compiles in 3.5 minutes. For the P-M series, what should I use to do automatic P-state/throttling changes? It seems that cpufreq wouldnt works since I have an ICH4. Is there anything that can effectively manage both? It would be nice to bring the CPU down to ~70Mhz (13% of 600MHz, P5 with T7) when I don't need any more than that. Also, I would very much like to do automatic hard drive standby-ing, what should I use to do that? Thank you for your time, looking forward to a response. -Prantik