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. - ajax
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