Indirect descriptor feature has been enabled in v16.11-rc1, but only TX path was implemented. However, some configurations expect it is supported for the Rx path: - Windows guests with and without mergeable buffers enabled - Linux guests with Kernel drivr with mergeable buffers disabled
This series add the support of indirect descs for the Rx path, and has been tested with following configurations: - Windows guest with indirect ON, mergeeable ON/OFF - Linux guest with Kernel driver with indirect ON/OFF, mergeable ON/OFF - Linux guest with Virtio PMD with mergeable ON/OFF The performance degradation measured with/without this series with Virtio PMD is around 1% (which doesn't use indirect descs for the Rx path). The series is based on top of "vhost: optimize mergeable Rx path" v7. Maxime Coquelin (2): vhost: Add indirect desc support to Rx mergeable path vhost: Add indirect desc support to the Rx no-mergeable path lib/librte_vhost/virtio_net.c | 73 ++++++++++++++++++++++++++++++------------- 1 file changed, 51 insertions(+), 22 deletions(-) -- 2.7.4
