On 5/26/15, 11:18 PM, "Lin XU" <lxu at astri.org> wrote:
>I think it is very important to decouple PMD driver with DPDK framework. > (1) Currently, the rte_mbuf struct is too simple and hard to support >complex application such as IPSEC, flow control etc. This key struct >should be extendable to support customer defined management header and >hardware offloading feature. I was wondering if adding something like M_EXT support for external storage to DPDK MBUF would be more reasonable. IMO decoupling PMDs from DPDK will possible impact performance and I would prefer not to let this happen. The drivers are written for performance, but they did start out as normal FreeBSD/Linux drivers. Most of the core code to the Intel drivers are shared between other systems. > (2) To support more NICs. >So, I thinks it time to add new API for PMD(a no radical way), and >developer can add initial callback function in PMD for various upper >layer protocol procedures. We have one callback now I think, but what callbacks do you need? The only callback I can think of is for a stack to know when it can release its hold on the data as it has been transmitted for retry needs. > >
