2304dd73d2
Indirect descriptors are usually supported by virtio-net devices, allowing to dispatch a larger number of requests. When the virtio device sends a packet using indirect descriptors, only one slot is used in the ring, even for large packets. The main effect is to improve the 0% packet loss benchmark. A PVP benchmark using Moongen (64 bytes) on the TE, and testpmd (fwd io for host, macswap for VM) on DUT shows a +50% gain for zero loss. On the downside, micro-benchmark using testpmd txonly in VM and rxonly on host shows a loss between 1 and 4%. But depending on the needs, feature can be disabled at VM boot time by passing indirect_desc=off argument to vhost-user device in Qemu. Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD license for the core libraries and drivers. The kernel components are GPLv2 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org