Messages in this thread | | | From | Gregory CLEMENT <> | Subject | [RFC PATCH 0/2] net: mvneta: Introduce RSS support | Date | Fri, 6 Nov 2015 19:35:09 +0100 |
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Hi,
this series is a first attempt to add RSS support on mvneta.
this series will allow associating an ethernet interface to a given CPU through RSS by using "ethtool -X ethX weight". Indeed, currently I only enable one entry in the RSS lookup table. Even if it is not really RSS, it allows to get back the irq affinity feature we lost by using the percpu interrupt.
The first patch really associates the RX queues with the CPUs instead of masking the percpu interrupts for doing it. All the RX queues are enabled and are statically associated with the CPUs by using a modulo of the number of present CPUs. But at this stage only one RX queue will receive the stream.
I also choose to associate all the TX queues on the same CPU that the one associated to the RX queue. It allows to contain all the interrupts on the same CPU. I think that an improvement on this side would be the support of the XPS.
The second patch introduces a first level of RSS support through the ethtool functions. As explained in the introduction there is only one entry in the RSS lookup table which permits at the end to associate an mvneta port to a CPU through the RX queues because the mapping is static.
I really would like to have some feedback before going further and then going in the wring direction.
Thanks,
Gregory CLEMENT (2): net: mvneta: Associate RX queues with each CPU net: mvneta: Add naive RSS support
drivers/net/ethernet/marvell/mvneta.c | 264 +++++++++++++++++++++++++++++----- 1 file changed, 229 insertions(+), 35 deletions(-)
-- 2.5.0
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