We found that optimizing fragmentation configuration of mlx4 driver performs as fast as native PMD. I think we have to re-consider using native driver rather than ib driver.
Keunhong. 2015-07-07 1:14 GMT+09:00 Thomas Monjalon <thomas.monjalon at 6wind.com>: > 2015-07-07 00:57, Keunhong Lee: > > Answer 1. UIO based driver is faster then ib based driver. > > It can saturate 40G link with MTU sized packets using a single thread > while > > ib wrapper cannot. > > OK, interesting. Do you have numbers and details about your > testbed/scenario? > > > Answer 2. Sorry, I missed that. I'll make a new patch email with my real > > name. > > > > Question 1. Is it OK if I separate GPL-based and BSD-based codes into > > separated patches? > > mlx4 kernel driver itself is dual licenses, so I think they are > considered > > as BSD in my source code. > > The only source code under GPL is bitmap, integer logarithm, and > red-black > > tree contained in mlnx_uio/kernel directory. > > These parts will be built in the user-space driver library, right? > It would change the license, which is not desirable. > > Technically, your approach may be interesting. > But from a maintenance point of view, this huge codebase may be a > nightmare. > > > > 2015-07-06 23:17 GMT+09:00 Thomas Monjalon <thomas.monjalon at 6wind.com>: > > > > > 2015-07-06 22:28, leeopop: > > > > This is a native UIO-based PMD for Mellanox ConnectX-3 devices. > > > > It uses a persistent memory library in order to provide a persistent > > > > scartch area for the mlx4 HCA driver. > > > > > > What is the benefit of this UIO approach compared to the OFED based > driver? > > > > > > > We release the driver itself under BSD license, but to use it for > > > > commercial products, you may have to re-implement the separated GPL > > > > sources. > > > > > > The GPL sources are not really separated. > > > The DPDK libraries must be BSD-licensed. > > > > > > > The GPL affected source codes reside in the mlnx_uio/kernel > directory. > > > > > > It seems that a large part of the GPL driver was also copied in > > > mlnx_uio/mlnx/. > > > > > > Given that you are dropping a huge GPL codebase (whose you don't own > the > > > copyright) in a BSD library, and that you didn't give your real name in > > > the signed-off line, it is NACK. > > > >
