[dpdk-dev] [PATCH 07/12] net/bnxt: increase max burst size for vector mode

Lance Richardson lance.richardson at broadcom.com
Fri Sep 11 17:38:27 CEST 2020


On Fri, Sep 11, 2020 at 11:19 AM Ferruh Yigit <ferruh.yigit at intel.com> wrote:
>
> On 9/9/2020 4:53 PM, Lance Richardson wrote:
> > Increase the maximum supported burst size for the bnxt vector
> > mode PMD from 32 to 64.
>
> What is the motivation here? Like does it improve the performance? If so in
> which conditions etc.. It would be nice to describe the why & impact.
>

How about this:

    net/bnxt: increase max burst size for vector mode

    Increase the maximum supported burst size for the bnxt vector
    mode PMD from 32 to 64. With larger burst sizes, per-burst
    overhead is amortized over more packets, improving overall
    performance. For small packets this has been measured to
    provide a 4-10% increase in single-core throughput with
    testpmd iofwd.

Thanks,
    Lance


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