linux-kernel - Re: Intel DP55KG + Intel Core i7 870 + Phoronix Benchmarks / Turbo Boost

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Date:	Mon, 9 Nov 2009 05:57:51 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	linux-kernel@...r.kernel.org, news@...ronix.com
cc:	Alan Piszcz <ap@...arrain.com>
Subject: Re: Intel DP55KG + Intel Core i7 870 + Phoronix Benchmarks / Turbo
 Boost



On Sun, 8 Nov 2009, Justin Piszcz wrote:

> Hello,
>
> I performed a bunch of tests with my processor to see if Turbo Boost was
> working correct, the short answer is, it /appears/ to be..

[ .. ]

There is another method to check whether Turbo Boost appears to be working, 
without ACPI_FREQ/etc, I noticed the none of the cores ever went above ~48-50c
for a single threaded application @ 100% CPU.

Now, with ACPI_FREQ+NO_HZ, etc, it is evident that the first core is probably
in Turbo Boost mode, the application being run also seems to indicate this as
it shows a slight increase in performance.

$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Core 0:      +57.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0001
Adapter: ISA adapter
Core 1:      +57.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0002
Adapter: ISA adapter
Core 2:      +41.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0003
Adapter: ISA adapter
Core 3:      +41.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0004
Adapter: ISA adapter
Core 4:      +46.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0005
Adapter: ISA adapter
Core 5:      +46.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0006
Adapter: ISA adapter
Core 6:      +41.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

coretemp-isa-0007
Adapter: ISA adapter
Core 7:      +41.0M-0C  (high = +84.0M-0C, crit = +100.0M-0C)

Justin.

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