[dpdk-dev] [PATCHv2 0/5] ethdev: add new API to retrieve RX/TX queue information
Bruce Richardson
bruce.richardson at intel.com
Thu Jun 18 15:39:00 CEST 2015
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 at dpdk.org] On Behalf Of Konstantin Ananyev
> > Sent: Thursday, June 18, 2015 3:19 PM
> > To: dev at 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
>
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