>I have most of the code for this ready; but it was for 2.2 kernels
>(nothing fancy; just a copy of the l2cr bit :-).
>
>I've looked at how one can integrate it into 2.4. We'd need a sysctl
>number in kernel/sysctl.[c,h], and a function handling the gory details.
>
>We could move the l2cr sysctl ou
On 6 Aug, this message from Benjamin Herrenschmidt echoed through cyberspace:
> Something else we may want to
> implement is a way (sysctl ?) to control the ICTC (instruction cache
> throttling). This has the effect of slowing down instruction fetching
> by the CPU and lowering it's temperature &
On Tue, 2002-08-06 at 11:34, Benjamin Herrenschmidt wrote:
> Anyway, once that is merged with cpufreq, I'd rather let userland decide
> on policy of what to do with CPU speed. Something else we may want to
> implement is a way (sysctl ?) to control the ICTC (instruction cache
> throttling). This ha
Go to the main penguinppc.org page. Apparent BenH has gotten the
800Mhz TiBook's to run at native speed. I have a hunch though, that
maybe the 667Mhz and 800Mhz TiBook's are exactly the same hardware, and
it is only a software hack to get them to go to 800Mhz (this is why the
speed throttlin
>Do you have any plans to try to integrate this with the cpu temperature
>detection so that it would automagically downclock when it runs too hot
>for too long?
>
>Might prolong the life of the machine a bit.
No, the internal CPU temperature stuff is broken, and not supported anymore
in the 745x f
On Tue, Aug 06, 2002 at 10:50:43AM -0400, Michael Furr wrote:
> Do you have any plans to try to integrate this with the cpu temperature
> detection so that it would automagically downclock when it runs too hot
> for too long?
Surely that's something that should be done in user space?
--
"You gr
I noticed this issue mentioned previously on this list, but there didn't
seem to be any resolution.
The 800MHz tiBook boots linux in 667MHz mode:
/proc/device-tree/cpus/PowerPC,G4
min-clock-frequency
000: 27c1 9cc0'...
max-clock-frequency
000: 2faf 0800
On Tue, 2002-08-06 at 10:36, Benjamin Herrenschmidt wrote:
> You can try if you aren't afraid..., just get my latest rsync or bk
> tree, then do
>
> echo "cpu_low_speed=0" >/proc/pmu/options
cool.
Do you have any plans to try to integrate this with the cpu temperature
detection so that it would a
> Go to the main penguinppc.org page. Apparent BenH has gotten the
>800Mhz TiBook's to run at native speed. I have a hunch though, that
>maybe the 667Mhz and 800Mhz TiBook's are exactly the same hardware, and
>it is only a software hack to get them to go to 800Mhz (this is why the
>spee
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