On Wed, Oct 22, 2008 at 6:10 AM, Slim Joe <[EMAIL PROTECTED]> wrote: > I just concluded that they have more or less similar ranges. My two > AMD systems (AMD X2 2.5Ghz and Sempron 1.8Ghz) have a similar > lowest frequency setting of 1000mhz, while my Core 2 Duo laptop > downclocks to 800mhz. On the other hand, I read a howto by a > FreeBSD user on the BSD version of cpufreq. It shows a > 2.8Ghz Pentium 4 with a lowest frequency setting of 350MHz: > > http://www.klintrup.dk/soren/cpufreq/ > > So I had to conclude that the FBSD kernel has a better speed control > mechanism. Neat! But it does look like he's just asking the ranges provided by the speedstep/coolnquiet, so he should be getting the same ranges as a linux user, except...
I just remembered that in compile time, you can set the kernel clock frequency, and most desktops set it to 1000mhz for low latency / good overall desktop responsiveness. Servers are recommended to set this at 100mhz for good throughput. I think THAT's why the lowest speed is 1000mhz - your desktop kernel imposes an arbitrary 1000mhz limit because that's its expected clock. Can someone verify if there's a way to tell the kernel to change its clock live? And also, if my idea about the kernel putting an arbitrary limit on processor clock frequency is correct? _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
