On Tue Jun 9 19:30:32 EDT 2009, m...@acm.jhu.edu wrote: > > On Tue Jun 9 17:20:12 EDT 2009, ge...@plan9.bell-labs.com wrote: > >> I've just pushed out kernel sources and binaries to incorporate > >> Aki's mtrr and vesa changes. The combination makes monitor=vesa > >> run quite a bit faster; we saw a factor of three speed improvement > >> in one case. > > What got three times faster? Do you have some kind of tool to measure > draw performance overall?
using andrey's screen saver hacks, i measured about an even greater speedup using PAT, a technique similar to mtrrs but one that uses page tables and not fixed physical ranges. i did my tests with andrey's xscreensaver hacks and timing catting large files to a fixed-sized window. i would attribute the perf difference between PAT and mtrr to be a function of measurement and hardware — as in my crappy hardware. if someone sees that one or the other is faster on the same hardware, that would be very interesting to me. - erik
