Hi, On Thu, Apr 5, 2012 at 10:55 PM, Yongcong Du <ycdu.vmcore@xxxxxxxxx> wrote: > Dear list, > > Here is my gsoc proposal, would you please help to review it? I will submit > it tomorrow morning. > > Introduce yourself > I began to use Linux 6 years ago and FreeBSD 3 years ago. I'm familiar with > c/c++ programing language. Two years ago, I began to reading the source code > of Linux kernel and write some interesting kernel modules. During one of my > internship period, I implemented the Linux cpufreq and cpuidle drivers for > one arm SoC > > In my spare time, I like to dig into Linux and NetBSD kernel source. The > interesting operating system areas to me are memory management, process > schedule. > > > why I choose haiku? > *newbie friendly and repose quickly community > I can always get exact answers and detailed information from > haiku-development mailing list or IRC > *lightweight > the typical installation only occupies ~180MB > > > Project Proposal > *Title > add cpuidle support to haiku > > *Description > In modern Operating Systems, power efficiency is one of the important areas. > Many OSs make use of both Macro and Micro technology to improve its power > efficiency. The former includes suspend to ram, suspend to disk etc. The > later includes the so called tickless, cpufreq and cpuidle. Generally > speaking, cpufreq is used to change the clock speed of the CPUs based on > system load while cpuidle is used to put CPU into deeper idle stage(for > example, C2, C3 stage on x86) when idle. > > Currently, haiku lacks of deeper CPU idle stage support. For example, on x86 > during idle haiku only calls hlt instruction[1] which put CPU into C1 stage. > This project will add cpuidle support to haiku, including platform and > driver independent framework and platform dependent drivers. This project > will haiku in power efficiency and will extends laptop's battery life under > haiku. To improve your proposal, I suggest giving a more precise overview of the parts that you will need to change. In which modules will you need to update the code? N>