Hi, this series is the first step add RSS support on mvneta.
It 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 main change compared to the first version is the add of the last patch. It is not related to RSS but it applied on top of the series so that why I added it there. This one was suggested by Arnd and allows better tx latency in some scenario. For example we see a more predictable behavior regarding throughput and latency when we have multiple threads sending out data on different CPUs, in particular different kinds of data. I also fixed some typos in the third patch. Th first patch make the default queue associate to each port and no more a global variable. The second 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. The third 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. Thanks, Gregory Gregory CLEMENT (4): net: mvneta: Make the default queue related for each port net: mvneta: Associate RX queues with each CPU net: mvneta: Add naive RSS support net: mvneta: Spread out the TX queues management on all CPUs drivers/net/ethernet/marvell/mvneta.c | 320 +++++++++++++++++++++++++++++----- 1 file changed, 276 insertions(+), 44 deletions(-) -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
