Thanks a lot Bruce to correct my assumption. This was what i looked for. Thanks Raman
On Wed, Mar 8, 2017 at 7:46 PM, Bruce Richardson <bruce.richard...@intel.com > wrote: > On Wed, Mar 08, 2017 at 07:05:03PM +0530, raman geetha gopalakrishnan > wrote: > > Hi All, > > > > I have the following basic question. Hope to get an answer / link where i > > can get myself clear. > > > > 1. In DPDK PMD is optimized driver for an given NIC to get maximum > > performance. > > That being the case why we are talking about DPDK supported NICs. > > > > A) My assumption is that NIC interface is standardized so that PMD > > should actually work with any NIC (barring some NIC specific performance > > tweaks) > > is that correct? > > No, that assumption is not correct, which is the reason we have so many > NIC drivers in DPDK. Each NIC uses a different method of talking to SW, > both in terms of the registers needed to be accessed to initialize the > NIC and then in terms of the metadata format used to receive or transmit > packets. > > Regards, > /Bruce > > > > > B) if #A is correct , how can i make changes to PMD to support any > NIC > > ? > > > > if i have to put the above question in different way then it is > > > > 2. what is preventing us from having a common PMD layer for all NICs and > > additional PMD specific to each NIC??? > > > > Thanks > > Raman >
