hank peng wrote:
I remember normal memory copy can also be done (chosen by user) by DMA engine on IOP80331(Intel embedded cpu, xscale arch), so why ppc platform didn't make use of DMA doing memory copy, I think it can increase performance, please correct me if I am wrong!
AFAIK the DMA engine has only an asynchronous mode (not very smart IMHO). This means you always have the overhead of context switch + interrupt + context switch, so the transfer has to be quite large for this to pay off.
Micha _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
