On Mon, Nov 9, 2009 at 11:08 AM, Adam Jackson <[email protected]> wrote: > On Thu, 2009-11-05 at 14:55 +0530, prudhvi raj wrote: > >> I have developed my driver using KAA in the same lines as ATI and >> Mach64 drivers, for example in order to implement hardware fillrect, i >> have implemented the corresponding hooks provided by kaa PrepareSolid, >> Solid and DoneSolid. In "Solid" hook i have placed my hardware >> fillrect api.For blit also i have placed the hardware blit call in >> "Copy" hook of KAA. >> >> But even though some calls are getting called through these kaa hooks >> i am not getting much performance improvement. > > I wish to point out here that mach64 is never going to be a fast chip. > >> So my queries are, >> 1. Am i placing my hardware API calls at right places in order to >> accelerate fillrect, blit operations?? As the number of hw calls are >> very fes compared to software calls i doubt whether the way to acheive >> hardware acceleration is this only or do i miss some more >> implementation?? > > You have implemented the hooks KAA gives you. This does not mean that > the hooks KAA gives you are sufficient. > >> 2. If placing the harware calls in the hooks provided by kaa should be >> enough to attain acceleration, why is the performance is not getting >> improved?? As the 'blit' operation happens huge number of times, by >> accelerating blit the performace should be improved drasticly. > > Like I said last time: KAA does not accelerate all paths. fbBlt is used > for both screen-to-screen and host-to-screen copies (and screen-to-host > for that matter). Host-to-screen is not something KAA accelerates. > >> 3. As per your comments, if the reason for not getting performance >> improvement lies inside KAA architecture itself, should i move to EXA >> to attain better performance improvement?? Using EXA would help to >> improve the performance?? > > It might. It might not. There are no silver bullets. > >> 4. Can you provide some sample drivers (as ATI, Mach64 in case of KAA) >> thst uses EXA for acceleration?? Please provide any documentation >> resources that explain the design and imeplementation details of KAA, >> EXA, XServer and how to acheive hardware acceleration in tinyx etc. > > The radeon and nouveau drivers both implement EXA backends, as does the > Xephyr server in kdrive.
There is even mach64 EXA support: http://cgit.freedesktop.org/xorg/driver/xf86-video-mach64 Alex _______________________________________________ xorg-devel mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-devel
