[dpdk-dev] [PATCH] ethdev: additional parameter in RX callback
Neil Horman
nhorman at tuxdriver.com
Thu Mar 12 20:15:40 CET 2015
On Thu, Mar 12, 2015 at 04:54:27PM +0000, John McNamara wrote:
>
> This patch is a minor extension to the recent patchset for RX/TX callbacks
> based on feedback from users implementing solutions based on it.
>
> The patch adds a new parameter to the RX callback to pass in the number of
> available RX packets in addition to the number of dequeued packets.
> This provides the RX callback functions with additional information
> that can be used to decide how packets from a burst are handled.
>
> The TX callback doesn't require this additional parameter so the RX
> and TX callbacks no longer have the same function parameters. As such
> the single RX/TX callback has been refactored into two separate callbacks.
>
> Since this is an API change we hope it can be included in 2.0.0 to avoid
> changing the API in a subsequent release.
>
>
> John McNamara (1):
> ethdev: added additional packet count parameter to RX callbacks
>
> examples/rxtx_callbacks/main.c | 3 +-
> lib/librte_ether/rte_ethdev.c | 8 ++--
> lib/librte_ether/rte_ethdev.h | 74 ++++++++++++++++++++++++++--------------
> 3 files changed, 54 insertions(+), 31 deletions(-)
>
> --
> 1.7.4.1
>
>
Well, we're well past the new feature phase of this cycle, so I would say NACK.
I would also suggest that you don't need to modify ABI to accomodate this
feature. Instead just document the pkts array to be terminated by a reserved
value, so that the callback can determine its size dynamically. You could
alternatively create a new api call that allows you to retrieve that information
from the context of the callback.
Neil
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