Messages in this thread |  | | | Date | Mon, 25 Jan 2010 04:56:02 -0500 (EST) | | From | Justin Piszcz <> | | Subject | Re: High pitch noise when ACPI processor module is loaded. |
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On Mon, 25 Jan 2010, Justin Piszcz wrote:
> Hi, > > I think something else may be wrong? > > I switched my kernel config to 100 HZ and the problem persists. > > So the question remains, is it possible to utilize turbo boost (in Linux) > without the high pitch noise from the ACPI processor module? > > Again, when the module is not loaded, no matter what HZ, there is no high > pitch noise. > > Justin. > >
Without ACPI processor module loaded, turbo boost never takes effect:
(turbostat)
CPU GHz TSC %c0 %c1 %c3 %c6 %pc3 %pc6 %pc7 0 2.93 2.93 1.41 98.59 0.00 0.00 0.00 0.00 0.00 1 2.93 2.93 100.00 0.00 0.00 0.00 0.00 0.00 0.00 2 2.93 2.93 1.51 98.49 0.00 0.00 0.00 0.00 0.00 3 2.93 2.93 0.97 99.03 0.00 0.00 0.00 0.00 0.00 4 2.93 2.93 0.90 99.10 0.00 0.00 0.00 0.00 0.00 5 2.93 2.93 0.34 99.66 0.00 0.00 0.00 0.00 0.00 6 2.93 2.93 0.40 99.60 0.00 0.00 0.00 0.00 0.00 7 2.93 2.93 3.07 96.93 0.00 0.00 0.00 0.00 0.00
With the module loaded, it works but there is a high pitch noise, again, only under Linux, when the same benchmark (bzip2 a file) is run under windows there is no high pitch noise:
CPU GHz TSC %c0 %c1 %c3 %c6 %pc3 %pc6 %pc7 0 3.30 2.93 0.44 0.82 25.29 73.44 0.00 0.00 0.00 1 3.33 2.93 0.24 1.02 25.29 73.44 0.00 0.00 0.00 2 3.43 2.93 1.84 5.41 48.65 44.10 0.00 0.00 0.00 3 3.41 2.93 0.49 6.76 48.65 44.10 0.00 0.00 0.00 4 3.58 2.93 99.44 0.56 0.00 0.00 0.00 0.00 0.00 5 3.43 2.93 0.03 99.97 0.00 0.00 0.00 0.00 0.00 6 3.09 2.93 0.14 0.23 89.74 9.89 0.00 0.00 0.00 7 2.13 2.93 0.01 0.36 89.74 9.89 0.00 0.00 0.00
Justin.
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