Re: [CALL FOR TESTERS] VESA High Resolution Console support from DragonFly

From: Eric Anderson <anderson_at_centtech.com>
Date: Wed, 25 May 2005 07:00:03 -0500
Eric Kjeldergaard wrote:
> 2005/5/25, Xin LI <delphij_at_delphij.net>:
> 
>>Hi, Eric,
>>
>>在 2005-05-25三的 13:28 +0900,Eric Kjeldergaard写道:
>>
>>>2005/5/23, Xin LI <delphij_at_frontfree.net>:
>>>
>>>>Hi, Jeremie,
>>>>
>>>>在 2005-05-23一的 02:38 +0200,Jeremie Le Hen写道:
>>>>[snip]
>>>>
>>>>>One question however : is it supposed to consume more CPU than classical
>>>>>non-VESA text mode ?
>>>>
>>>>I think so, it should consume more CPU than classical text mode console
>>>>since it draws characters, rather than giving the responsibility to the
>>>>video card.  A possible optimization would be to map the video card
>>>>memory into the space.
>>>
>>>Tested on my Thinkpad R40 : Radeon 7500.  Is it supposed to consume a
>>>LOT of cpu?  Perhaps there's something funny with -O2 or similar
>>>because some things are VERY slow.  I have not, however, noticed any
>>>major bugs, but screen redraws will take ~1 second if the screen is
>>>not cleared and thus causes powerd to kick my processor up to full
>>>speed often.  Also, the screensaver (logo_saver) seems to take a while
>>>to display.  The screen goes black for 10 - 15 seconds before the
>>>screen saver displays.  Through all this, though, it's still so worth
>>>it.
>>
>>Yes, it requires more CPU cycles if you use raster mode.  Does it also
>>slow down your console if you are running under text mode?  I hope
>>not :-)
>>
> 
> 
> If I'm in text mode it's fine, but of course low-res.  When I'm in
> raster mode I think it's maybe slower than it needs to be?  (Slower
> than similar situations in Linux, for instance.)  Also, if I have some
> terminals in text and some in raster, the switch between them is long.
>  That's hardly a problem by itself, though, as I rarely run mixed
> terminal resolutions.

I noticed that changing to 16bit (instead of 32 or 24) helped a lot.

Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
A lost ounce of gold may be found, a lost moment of time never.
------------------------------------------------------------------------
Received on Wed May 25 2005 - 10:00:45 UTC

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