bc91e8db12
A PMD parameter (rxq_cqe_pad_en) is added to enable 128B padding of CQE on RX side. The size of CQE is aligned with the size of a cacheline of the core. If cacheline size is 128B, the CQE size is configured to be 128B even though the device writes only 64B data on the cacheline. This is to avoid unnecessary cache invalidation by device's two consecutive writes on to one cacheline. However in some architecture, it is more beneficial to update entire cacheline with padding the rest 64B rather than striding because read-modify-write could drop performance a lot. On the other hand, writing extra data will consume more PCIe bandwidth and could also drop the maximum throughput. It is recommended to empirically set this parameter. Disabled by default. Signed-off-by: Yongseok Koh <yskoh@mellanox.com> Acked-by: Shahaf Shuler <shahafs@mellanox.com> |
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| buildtools | ||
| config | ||
| devtools | ||
| doc | ||
| drivers | ||
| examples | ||
| kernel | ||
| lib | ||
| license | ||
| mk | ||
| pkg | ||
| test | ||
| usertools | ||
| .gitattributes | ||
| .gitignore | ||
| GNUmakefile | ||
| MAINTAINERS | ||
| Makefile | ||
| meson_options.txt | ||
| meson.build | ||
| README | ||
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