Re: [memnic PATCH 0/7] MEMNIC PMD performance improvement

[Tetsuya Mukawa <mukawa-AlSX/UN32fvPDbFq/vQRIQ@public.gmane.org>]

Hi Shimamoto-san,


(2014/09/11 16:45), Hiroshi Shimamoto wrote:
> From: Hiroshi Shimamoto <h-shimamoto-ehU+Cx/zZe18UrSeD/g0lQ@public.gmane.org>
>
> This patchset improves MEMNIC PMD performance.
>
> The first patch introduces a new benchmark test run in guest,
> and will be used to evaluate the following patch effects.
>
> This patchset improves the throughput results of memnic-tester.
> Using Xeon E5-2697 v2 @ 2.70GHz, 4 vCPU.
How many cores are you actually using for sending and receiving?
I guess 1 dedicated core is used for sending on host or guest side, and
one more dedicated core is for receiving on the other side.
And you've got a following performance result.
Is this correct?

Thanks,
Tetsuya Mukawa

>  size |  before  |  after
>    64 | 4.18Mpps | 5.83Mpps
>   128 | 3.85Mpps | 5.71Mpps
>   256 | 4.01Mpps | 5.40Mpps
>   512 | 3.52Mpps | 4.64Mpps
>  1024 | 3.18Mpps | 3.68Mpps
>  1280 | 2.86Mpps | 3.17Mpps
>  1518 | 2.59Mpps | 2.90Mpps
>
> Hiroshi Shimamoto (7):
>   guest: memnic-tester: PMD benchmark in guest
>   pmd: remove needless assignment
>   pmd: use helper macros
>   pmd: use compiler barrier
>   pmd: packet receiving optimization with prefetch
>   pmd: add branch hint in recv/xmit
>   pmd: split calling mbuf free
>
>  guest/Makefile        |  20 ++++
>  guest/README.rst      |  94 +++++++++++++++++
>  guest/memnic-tester.c | 281 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  pmd/pmd_memnic.c      |  43 ++++----
>  4 files changed, 417 insertions(+), 21 deletions(-)
>  create mode 100644 guest/Makefile
>  create mode 100644 guest/README.rst
>  create mode 100644 guest/memnic-tester.c
>