Re: mpc8548 does not make use of DMA when doing memory copy?

2009-11-03 Thread Micha Nelissen
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

Re: mpc8548 does not make use of DMA when doing memory copy?

2009-11-03 Thread hank peng
2009/11/3 Micha Nelissen mi...@neli.hopto.org: 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,

Re: mpc8548 does not make use of DMA when doing memory copy?

2009-11-03 Thread Kumar Gala
On Nov 3, 2009, at 8:38 AM, hank peng wrote: 2009/11/3 Micha Nelissen mi...@neli.hopto.org: 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

mpc8548 does not make use of DMA when doing memory copy?

2009-11-02 Thread hank peng
Kernel version is 2.6.30 and I have enabled fsl DMA engine during configuring kernel. After system booted, I have seen only 38 DMA interrupts, and no increase later when I am doing data transfer through network. So I wonder if mpc8548 had made use of DMA engine when doing memcpy, or maybe if

Re: mpc8548 does not make use of DMA when doing memory copy?

2009-11-02 Thread Kumar Gala
On Nov 2, 2009, at 9:40 AM, hank peng wrote: Kernel version is 2.6.30 and I have enabled fsl DMA engine during configuring kernel. After system booted, I have seen only 38 DMA interrupts, and no increase later when I am doing data transfer through network. So I wonder if mpc8548 had made use

Re: mpc8548 does not make use of DMA when doing memory copy?

2009-11-02 Thread hank peng
2009/11/3 Kumar Gala ga...@kernel.crashing.org: On Nov 2, 2009, at 9:40 AM, hank peng wrote: Kernel version is 2.6.30 and I have enabled fsl DMA engine during configuring kernel. After system booted, I have seen only 38 DMA interrupts, and no increase later when I am doing data transfer