Frank, On 2002.05.25 18:24 Frank C. Earl wrote: > ... This is extremely disappointing to say the least. Doing the > copying is going to eat at least part if not all the advantage of doing > either route.
Yes, it's something we have to deal regardless of how we flush the DMA buffers.. Of course that it will be always slower, but I think that it can be reduced to a barely noticed different. It really depends were the bottleneck will be on a regular OpenGL application. On older CPUs with mach64 perhaps not, but the laptops where the mach64 chip is common have fairly good CPUs comparing with the Mach64 abilities, so I believe that the bottleneck will be on the card. This means that if we do this right, i.e., do it the less CPU intensive way and use fairly large buffers (since Mach64 allows to use scatter gather memory), then the only difference will be a slightly increased latency, but not really a lower number of fps. In other words, the bandwidth to the card should be unaffected. Anyway, until then we still have to optimize the vertex buffers contructions, and after that we should be able to compare the performance with and without this security enforcement. Regards, José Fonseca _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
