On 10/25/2017 2:19 AM, Nélio Laranjeiro wrote:
> On Tue, Oct 24, 2017 at 05:27:25PM -0700, Yongseok Koh wrote:
>> Configuring UAR as IO-mapped makes maximum throughput decline by noticeable
>> amount. If UAR is configured as write-combining register, a write memory
>> barrier is needed on ringing a doorbell. rte_wmb() is mostly effective when
>> the size of a burst is comparatively small. Revert the register back to
>> write-combining and enforce a write memory barrier instead, except for
>> vectorized Tx burst routines. Application can change it by setting
>> MLX5_SHUT_UP_BF under its own necessity.
>>
>> Fixes: 9f9bebae5530 ("net/mlx5: don't map doorbell register to write
>> combining")
>> Cc: sta...@dpdk.org
>> Cc: Sagi Grimberg <s...@grimberg.me>
>> Cc: Alexander Solganik <solga...@gmail.com>
>>
>> Signed-off-by: Yongseok Koh <ys...@mellanox.com>
>> Acked-by: Shahaf Shuler <shah...@mellanox.com>
>
> Acked-by: Nelio Laranjeiro <nelio.laranje...@6wind.com>
Applied to dpdk-next-net/master, thanks.
