MTRR's: What kind of speedup? Any regions besides framebuffer?

Benjamin Redelings I (bredelin@UCSD.Edu)
Mon, 26 Jan 1998 23:46:59 -0800

Hi, I have a PPro 150->166 with bus speed 66MHz. I notice on loading
proform.o (with kernel 2.1.82) that I get an improvement of 17.2->20.7
fps at 512x384 in q2test (Quake II Test). I guess thats a 20% increase
but it doesn't seem THAT big...is that normal? High? Low?
I'm also wondering if there are other regions besides the framebuffer
than can/should be set to Write-Combining. I'm using XFree86 3.3.1 with
a Matrox Mystique w/ 2Mb SGRAM. (Also, anyone think I could get an
improvement by using the XSuse server?)
I'm interested in this mainly as a benchmark...but perhaps my CPU isn't
stressing the bus out cuz it isn't fast enough ;)

Thanks,
-BenRI