On 02/10/10 16:26, Jeffrey Baker wrote: > "Turbo Mode" seems to be some overheated rhetoric considering that P0 > on the Core 2 Duo is only .05% faster than P1. Why does this state > even exist? > > Newly revealed in Powertop 1.12
boo hoo I just downloaded Intel's whitepaper[1] (first hit on google) on turbo mode and read this in it: --- 2.1 Problem with Today’sSoftware Reporting Frequency Most currently available software that calculates frequency relies on the ACPI P-state structures that are provided by the BIOS or calls an application programming interface (API) that relies on these structures. The ‘frequency’ field in the P0 ACPI _PSS object does not reflect actual Intel® Turbo Boost technology frequencies. Instead, it always shows the P0 frequency as P1 frequency plus 1 MHz. Due to this, software that uses the P- state structures, directly or indirectly, will not properly display Intel® Turbo Boost technology frequencies. NOTE: Operating Systems may also be impacted and may not report accurate frequency. --- there is your answer. [1]http://www.intel.com/technology/turboboost/ _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
