055a393626
This commit introduces support for preferred busy polling to the AF_XDP PMD. This feature aims to improve single-core performance for AF_XDP sockets under heavy load. A new vdev arg is introduced called 'busy_budget' whose default value is 64. busy_budget is the value supplied to the kernel with the SO_BUSY_POLL_BUDGET socket option and represents the busy-polling NAPI budget. To set the budget to a different value eg. 256: --vdev=net_af_xdp0,iface=eth0,busy_budget=256 Preferred busy polling is enabled by default provided a kernel with version >= v5.11 is in use. To disable it, set the budget to zero. The following settings are also strongly recommended to be used in conjunction with this feature: echo 2 | sudo tee /sys/class/net/eth0/napi_defer_hard_irqs echo 200000 | sudo tee /sys/class/net/eth0/gro_flush_timeout .. where eth0 is the interface being used by the PMD. Signed-off-by: Ciara Loftus <ciara.loftus@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@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-3-Clause license for the core libraries and drivers. The kernel components are GPL-2.0 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