Re: [dpdk-dev] [PATCH] af_packet: allow configuring number of rings

[Stephen Hemminger <stephen@networkplumber.org>]

On Thu, 27 Feb 2020 17:20:45 +0000
Ferruh Yigit <ferruh.yigit@intel.com> wrote:

> On 2/24/2020 11:11 PM, Stephen Hemminger wrote:
> > The maximum number of rings in af_packet is hard coded as 16.
> > The user should be able to configure this as part of DPDK config.
> > 
> > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> > ---
> >  config/common_base                        | 1 +
> >  drivers/net/af_packet/rte_eth_af_packet.c | 3 +++
> >  2 files changed, 4 insertions(+)
> > 
> > diff --git a/config/common_base b/config/common_base
> > index 6ea9c63cc36b..dd154a474b57 100644
> > --- a/config/common_base
> > +++ b/config/common_base
> > @@ -468,6 +468,7 @@ CONFIG_RTE_LIBRTE_VMXNET3_DEBUG_TX_FREE=n
> >  # Compile software PMD backed by AF_PACKET sockets (Linux only)
> >  #
> >  CONFIG_RTE_LIBRTE_PMD_AF_PACKET=n
> > +CONFIG_RTE_PMD_AF_PACKET_MAX_RINGS=16
> >    
> 
> Not sure about adding a new config option for this.
> 
> There is already "qpairs" devarg, allocating queues dynamically, instead of
> using a per-defined sized arrays, should enable removing
> 'RTE_PMD_AF_PACKET_MAX_RINGS' completely.

But the current driver does not allow qpairs > 16.
This is a config option to allow more.