• 状态
  • 已锁定 已锁定
  • 回复 0 回复
  • 订户 14 订户
  • 视图 1095 视图
  • 用户 0 会员在此处
选项
选项
相关

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DM8168: PCI-e problem

yi zhang
Prodigy 10 points


Hi, I ran into a strange problem when i make use of the PCI-e port on DM8168: 

      I have a PCI-e DAQ board, then i test it on PC(x86) and DM8168 evm board.

      1) when i run my driver on PC(X86 + fedora 15), the transmission speed  is about 180MB/s(with DMA), 150MB/s(if i use copy_to_user())

      2) then i set DM8168 evm board work on RC mode, when i run the same code on DM8168,  the speed is just about 50~60MB/s(DMA), 15~25MB/s(copy_to_user())

      3) the driver code is same, what i have done is just cross-compile to make them work on DM8168

Is there anyone who can tell me about this?  Is it about  hardware or toolchains or anything else? By the way , the toolchain is provided by TI's PSP packet, thanks!