On Fri, Jul 2, 1999, Geert Uytterhoeven
[off-list ref] wrote:

To get maximum performance, you want a low threshold-empty value and a high
threshold-full value, because SGRAM is optimized for burst accesses, but

has a

high latency for the initial access. Higher threshold-empty and lower
threshold-full values are more conservative and more likely to not

disturb the

screen, but lower the performance.

What about providing a private ioctl to set those threshold values ? With
a simple command line tool and eventually a pair of sliders on X, this
would allow people to try out and us to collect infos about behaviour of
various values on various configurations, and eventually provide more
conservative default values, and letting the user eventually increase
performances later. 


-- 
           Perso. e-mail: <mailto:bh40@calva.net>
           Work   e-mail: <mailto:benh@mipsys.com>
BenH.      Web   : <http://calvaweb.calvacom.fr/bh40/>




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