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 >
