Messages in this thread | | | Date | Tue, 27 Jan 1998 20:38:18 +1100 | From | Richard Gooch <> | Subject | Re: MTRR's: What kind of speedup? Any regions besides framebuffer? |
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Benjamin Redelings, I writes: > 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 ;)
I don't know what your test does, but image write operations should be 2.5 to 2.8 times faster. BTW: have you seen MTRR v1.5? It's at: http://www.atnf.csiro.au/~rgooch/kernel-patches.html
It gives a nice /proc/mtrr interface.
Regards,
Richard....
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