Hi, The dev mailing list is more appropriate for this discussion.
2015-12-04 18:30, Ran Shalit: > On Thu, Nov 12, 2015 at 10:49 AM, Thomas Monjalon > <thomas.monjalon at 6wind.com> wrote: > > 2015-11-12 09:14, Ran Shalit: > >> I need to develop a driver/application which capture and output video > >> frames from PCIe device , and is using Intel cpu (i7), Centand Intel's > >> media sdk server framework for the video compression. > >> > >> I am not sure what will be a better choice between the following 2 options: > >> 1. application which use dpdk for capture and output to the PCIe device > >> 2. v4l driver for the PCIe device > >> > >> dpdk is supposed to be able to read/write from PCIe device too. > >> I tried to see the prons/cons of dpdk compared to v4l. > >> > >> prons of dpdk, as I understand them: > >> 1. userspace application (easier debugging compared to kernel > >> debugging of v4l device driver) > >> 2. supposed better performance > >> > >> cons of dpdk compared to v4l: > >> 1. I could not find examples for PCIe device usage , or samples for > >> showing how application (such as media sdk) use dpdk video frames. > > > > There is no API for video currently. > > There is an API for networking drivers and a crypto API is coming. > > If you feel a DPDK poll mode driver would be a good design, you are > > welcome to do it. In case it brings some performance improvement, > > it can be decided (no guarantee) to integrate it in the scope of the DPDK. > > Hi Thomas, > > I've reply for a message posted some time ago. > Is dpdk capable of recieveing and sending buffers from PCIe using DMAs ? Of course yes. > I think that if the buffers represent video or not is less important, > because the important thing is to be capable to stream buffers from > (or to) the PCIe device. > Do you think it is ready to be used for such purpose ? You need to write a driver for your device. Then your application needs an video API in DPDK. > I ask becuase I try to see which alternative is better v4l2 or dpdk. > Dpdk can be used from userspace which in my opinion is great > advantage, but if it can't do these streaming of buffers from PCIe, > than probably I should stick with v4l2 development. I think your development would be welcome in DPDK.
