00b8b70666
Add an option, --dequeue-zero-copy, to enable dequeue zero copy. One thing worth noting while using dequeue zero copy is the nb_tx_desc has to be small enough so that the eth driver will hit the mbuf free threshold easily and thus free mbuf more frequently. The reason behind that is, when dequeue zero copy is enabled, guest Tx used vring will be updated only when corresponding mbuf is freed. If mbuf is not freed frequently, the guest Tx vring could be starved. Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Tested-by: Qian Xu <qian.q.xu@intel.com> |
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| main.c | ||
| main.h | ||
| Makefile | ||