Hi, ----- Original Message ----- From: Mark Haywood <[email protected]> Date: Tuesday, July 22, 2008 5:35 pm Subject: Re: [tesla-dev] Question on PowerTop V 1.1 To: Vinay Devadas <Vinay.Devadas at Sun.COM> Cc: tesla-dev at opensolaris.org
> Vinay Devadas wrote: > > Hi, > > > > I ran powertop V 1.1 on a laptop with the following supported frequencies, > > > > 800:1200:1600:2000:2400:2401 > > > > PowerTop also lists 2401MHz as a P state (P0). Is this correct ? I > thought 2401MHz is the Turbo Mode frequency. Can someone please > clarify this. Is there a way one can check if the processor supports > turbo mode through the BIOS ? > > > > Turbo Mode is advertised as P0. So, yes this is correct. There is an > outstanding RFE for PowerTop to calculate an average frequency while > in > Turbo Mode. I'm not sure how this is going to be presented. > If Turbo Mode itself is advertised as P0, what does it mean to say "average frequency" ? Is it not that, the processor only runs in Turbo Frequency (2401Mhz in the example) for a while when it over clocks itself in P0(which I thought was 2400MHz)? Thanks -Vinay > As for BIOS settings for Turbo Mode, I think it depends on the BIOS as > > to whether or not there is a setting to enable/disable Turbo Mode. > > I think that you can read the ia32_misc_enable msr to find out whether > > or not it is enabled. > > Mark > > > Thanks, > > Vinay > > _______________________________________________ > > tesla-dev mailing list > > tesla-dev at opensolaris.org > > http://mail.opensolaris.org/mailman/listinfo/tesla-dev > > > > _______________________________________________ > tesla-dev mailing list > tesla-dev at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/tesla-dev
