[dpdk-dev] [PATCH] virtio: Fix stats issue
Ouyang, Changchun
changchun.ouyang at intel.com
Mon Mar 23 09:38:31 CET 2015
On 3/23/2015 3:20 PM, David Marchand wrote:
> Hello,
>
> Hello,
>
> On Mon, Mar 23, 2015 at 7:56 AM, Ouyang Changchun
> <changchun.ouyang at intel.com <mailto:changchun.ouyang at intel.com>> wrote:
>
> It need clear/reset the stats information before count in all
> queues data.
>
> Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com
> <mailto:changchun.ouyang at intel.com>>
> ---
> lib/librte_pmd_virtio/virtio_ethdev.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c
> b/lib/librte_pmd_virtio/virtio_ethdev.c
> index 603be2d..e4cb55e 100644
> --- a/lib/librte_pmd_virtio/virtio_ethdev.c
> +++ b/lib/librte_pmd_virtio/virtio_ethdev.c
> @@ -572,6 +572,10 @@ virtio_dev_stats_get(struct rte_eth_dev *dev,
> struct rte_eth_stats *stats)
> {
> unsigned i;
>
> + stats->opackets = 0;
> + stats->obytes = 0;
> + stats->oerrors = 0;
>
>
> stats are supposed to be zero'd in generic rte_ethdev.c before this
> pmd function is called, so this patch seems useless to me.
> Can you give some context ?
>
> Same comment for the i* part.
>
2 reasons:
1. this change could keep the stats_get has consistent behavior with the
one in other drivers;
2. we don't rely on the assumption of caller always zero'd the stats,
and still can return correct value;
thanks
Changchun
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