Re: [dpdk-dev] [PATCHv2 0/5] ethdev: add new API to retrieve RX/TX queue information

["Walukiewicz, Miroslaw" <Miroslaw.Walukiewicz@intel.com>]

Yes, really I need a high performance function - it is especially useful on TX path.

Which queue query function are you talking here to be enhanced?

Mirek

> -----Original Message-----
> From: Richardson, Bruce
> Sent: Thursday, June 18, 2015 3:39 PM
> To: Walukiewicz, Miroslaw
> Cc: Ananyev, Konstantin; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCHv2 0/5] ethdev: add new API to retrieve RX/TX
> queue information
> 
> On Thu, Jun 18, 2015 at 01:30:33PM +0000, Walukiewicz, Miroslaw wrote:
> > Konstantin,
> >
> > Is there a possibility to read information about available space in NIC queue
> for TX.
> >
> > It is quite easy to compute (or even available directly)  and very useful
> especially for application sending multi-descriptor packets like TCP TSO.
> >
> > Now there is no access to such information and the transmit packet function
> must be called to
> > be sure that there is available space.
> >
> > Mirek
> >
> 
> Hi Mirek,
> 
> I'm not sure this function is the right place for such a query. It seems that
> a function like you require needs to be used on the datapath, while this API
> is not planned to be high-performance. I think that it might be better to
> add an equivalent function to the existing RX descriptor querying function.
> 
> /Bruce
> 
> > > -----Original Message-----
> > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Konstantin
> Ananyev
> > > Sent: Thursday, June 18, 2015 3:19 PM
> > > To: dev@dpdk.org
> > > Subject: [dpdk-dev] [PATCHv2 0/5] ethdev: add new API to retrieve RX/TX
> > > queue information
> > >
> > > Add the ability for the upper layer to query RX/TX queue information.
> > > Right now supported for:
> > > ixgbe, i40e, e1000 PMDs.
> > >
> > > Konstantin Ananyev (5):
> > >   ethdev: add new API to retrieve RX/TX queue information
> > >   i40e: add support for eth_(rxq|txq)_info_get
> > >   ixgbe: add support for eth_(rxq|txq)_info_get
> > >   e1000: add support for eth_(rxq|txq)_info_get
> > >   testpmd: add new command to display RX/TX queue information
> > >
> > >  app/test-pmd/cmdline.c           | 48 +++++++++++++++++++++++++
> > >  app/test-pmd/config.c            | 67
> > > ++++++++++++++++++++++++++++++++++
> > >  app/test-pmd/testpmd.h           |  2 ++
> > >  drivers/net/e1000/e1000_ethdev.h | 12 +++++++
> > >  drivers/net/e1000/em_ethdev.c    |  2 ++
> > >  drivers/net/e1000/em_rxtx.c      | 38 ++++++++++++++++++++
> > >  drivers/net/e1000/igb_ethdev.c   |  4 +++
> > >  drivers/net/e1000/igb_rxtx.c     | 36 +++++++++++++++++++
> > >  drivers/net/i40e/i40e_ethdev.c   |  2 ++
> > >  drivers/net/i40e/i40e_ethdev.h   |  5 +++
> > >  drivers/net/i40e/i40e_rxtx.c     | 42 ++++++++++++++++++++++
> > >  drivers/net/ixgbe/ixgbe_ethdev.c |  4 +++
> > >  drivers/net/ixgbe/ixgbe_ethdev.h |  6 ++++
> > >  drivers/net/ixgbe/ixgbe_rxtx.c   | 42 ++++++++++++++++++++++
> > >  lib/librte_ether/rte_ethdev.c    | 54 ++++++++++++++++++++++++++++
> > >  lib/librte_ether/rte_ethdev.h    | 77
> > > +++++++++++++++++++++++++++++++++++++++-
> > >  16 files changed, 440 insertions(+), 1 deletion(-)
> > >
> > > --
> > > 1.8.5.3
> >