On Sun, 25 Jul 2010, Alexander Motin wrote:
The numbers that you are showing doesn't show much difference. Have you
tried buildworld?
If you mean relative difference -- as I have told, it's mostly because of my
CPU. It's maximal boost is 266MHz (8.3%), but 133MHz of them is enabled most
of time if CPU is not overheated. It probably doesn't, as it works on clear
table under air conditioner. So maximal effect I can expect on is 4.2%. In
such situation 2.8% probably not so bad to illustrate that feature works and
there is space for further improvements. If I had Core i5-750S I would
expect 33% boost.
Can I recommend the use of ministat(1) and sample sizes of at least 8 runs per
configuration?
Robert
If you mean absolute difference, here are results or four buildworld runs:
hw.acpi.cpu.cx_lowest=C1: 4654.23 sec
hw.acpi.cpu.cx_lowest=C2: 4556.37 sec
hw.acpi.cpu.cx_lowest=C2: 4570.85 sec
hw.acpi.cpu.cx_lowest=C1: 4679.83 sec
Benefit is about 2.1%. Each time results were erased and sources
pre-cached into RAM. Storage was SSD, so disk should not be an issue.
--
Alexander Motin
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