Intel Software Network Comments feed

By Michael

Tue, 23 Oct 2007 14:01:34 -0700

How about showing us how to get the CPU to ALWAYS run at FULL SPEED in a Windows machine? We need this because Intel foolishly did not continue the TSC at full speed when the CPU clock is throttled. This SCREWS up timing and the Windows routines don't properly handle this. This is especially a problem in Multi-Core machines. So, I need to keep the CPU at FULL speed.

By Intel(R) Software Network Support

Fri, 02 Nov 2007 16:25:45 -0700

Michael, our engineering contacts responded that they are unaware of any Intel(R) multi-core processor that has this behavior; it is actually with non-Intel processors that the TSC does not count at the highest frequency when demand-based switching is enabled. Those who are not using an Intel processor can disable demand-based switching in Windows* XP SP2 such that the processor always runs at the highest frequency by changing the Power Scheme, in the Power Options accessed via the Control Panel, to Always On. If in fact you are seeing this with an Intel multi-core processor, please send us an email with additional details.

By ethana2

Fri, 29 Feb 2008 16:44:08 -0800

"Windows routines don't properly handle.." SURPRISE! Those coders in Redmond assume all kinds of bizarre stuff- and it's not intel's job to fix it, because, well, they can't. ...which isn't the case with the linux kernel, and I applaud them for taking advantage of that. ...I still would love to see intel make SPARC T2 chips. I mean, that design and ISA on intel's state of the art chip processing technology.. *drools* It's openly licensed and such; one of the best things about FOSS is that it liberates us from any given ISA. Intel SPARC, in my opinion, would be the best of the best of the best. Or even PPC.. or both.

By Colin Williams

Fri, 05 Dec 2008 23:40:52 -0800

how about some dumbed down directions for us end users of ubuntu 8.10 who do not wish to compile their kernel?

By Mark UK

Sun, 05 Apr 2009 22:49:47 -0700

Hi Intel .. i have a celeron m 530 in my acer 5220 laptop here.. and i also run LINUX - i am using Mepis 8 at the moment because the cpu fan does occasionally switch off on this distro. i recompiled my new vanilla kernel from kernel.org and enabled all kinds of speed stepping but sadly it went wrong somewhere, i like compiling the odd app, but the kernel is a bit beyond me at the moment.. i cant find a definitive document that tells me if this celeron m 530 actually has any speedstep capabilities, the various linux forums i seem to find seem to be rather quiet on the issue of cpu scaling in the kernel.. though i know of no distro;s that do it be default. annd i have tried from slackware to jaunty. i have been told i could replace my cpu with a dual core option which is lower power, faster and fully supports cpu scaling. i shall keep trying a kernel recompile .. Colin good luck mate :) cheers Intel Mark UK

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Sun, 16 Aug 2009 22:51:21 -0700

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By Saurabh Sinha

Thu, 08 Oct 2009 02:58:01 -0700

Thanks for the awesome tutorial. Needed to know about DVS/DVFS schemes currently in use and this one helped. Regards Saurabh

By Karan Khanna

Fri, 13 Nov 2009 19:01:39 -0800

Hi Intel, This was a very helpful overview of Linux Kernel's cpufreq infrastructure. Thanks!