The ati petition
volodya at mindspring.com
Mon Sep 13 07:59:29 PDT 2004
>> RE_CLK: 0 - Dynamic
>> 1 - Force on
>> To me this would mean that the RE (Render Engine) clock is not active if
>> there is nothing for the render engine to do.
>> Keep in mind that this is mere speculation. Also, some ATI sample code
>> writes 1 to such registers with comment that "some versions of ASIC do not
>> properly implement dynamic clocks". Linux drivers do not have this code
>> though, so this might have been fixed in production version.
> I recently applied a patch from ati for enabling dynamic clock scaling
> to xorg cvs. enable it with option "DynamicClocks". it provides a
> noticeable increase in battery life on my m6 laptop.
Cool ! Does this also imply that HEAD is unfrozen ?
Alex, could you clear up one thing for me - does current HEAD work with
DRM ? At least r200 chips ?
thank you !
>> Vladimir Dergachev
>>> The basic clock rate used nowadays is high enough and the area of the
>>> chip die is big enough that these issues are non-negligeable. Of course,
>>> restarting the stopped blocks can also be a bit tricky for the chip
>>> Another rather popular technique is to step the clock speed but that is
>>> much more complex to implement for the designers which is why few ASICs
>>> really do it.
>>> Of course, this is off-topic but I could not resist. Bad bad me. It
>>> should be said I have minimum experience in this domain so, the usual
>>> disclaimers apply.
>>> Mathieu Lacage <mathieu at gnu.org>
>>> xorg mailing list
>>> xorg at freedesktop.org
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