Re: instruction cache throttling

[Joerg Sommer <joerg@alea.gnuu.de>]

John Steele Scott <toojays@toojays.net> wrote:
> Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
>> Did you see a significant difference in battery consumption with
>> different ictc values ?
>
> In my non-scientific messing around, which looked at temperature, not battery
> life, it seemed to me that using ICTC resulted in a hotter chip than not using
> it, for a load less than 100%.

Interesting. I would say my cpu doesn't get hot as normal. But I'm not
sure.

> My test load was just playing Ogg Vorbis files, IIRC if I used ICTC to
> make my iBook run with an effective execution rate of 133MHz, playing
> music took about 80% of CPU.

How do you set the ictc? With a value of 254 and 600MHz I play mp3s
with load nearly zero. Because this I think my module do not work.

Do you have any lines of code?

Jörg.
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