From: "Antonino A. Daplas" <adaplas@hotpop.com>
To: linux-fbdev-devel@lists.sourceforge.net, Gary Thomas <gary@mlbassoc.com>
Subject: Re: Framebuffer console performance
Date: Fri, 15 Apr 2005 12:57:05 +0800 [thread overview]
Message-ID: <200504151257.05950.adaplas@hotpop.com> (raw)
In-Reply-To: <1111702489.29791.216.camel@hermes>
On Friday 25 March 2005 06:14, Gary Thomas wrote:
> I have a non-standard framebuffer (i.e. I wrote the driver,
> based on the au1000 driver) running on 2.4.27. When I run
> virtual consoles on it, I see sluggish scroll performance.
> I get quite acceptable performance when the system first
> comes up, e.g. during the system initialization messages,
> but not long afterwards the scrolling slows down. It can
> get continually worse, eventually ending up at a crawl.
When the system starts up, the scroll mode is 'redraw'. This mode is
acceptable, not too slow and not too fast either, whatever the hardware is.
After starting up, the scroll mode changes depending on the driver. Most
probably, it is using ypan which is not too great on systems without
accelerated rectangle moves and framebuffer reads are slow.
Try setting vyres == yres using fbset and see if that helps.
Tony
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next prev parent reply other threads:[~2005-04-16 3:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-24 22:14 Framebuffer console performance Gary Thomas
2005-04-15 4:57 ` Antonino A. Daplas [this message]
[not found] ` <1113650790.10535.42.camel@hermes>
2005-04-18 11:07 ` Gary Thomas
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