d7ec2c0765
Tx prepare should be called only when necessary to reduce the impact on
performance.
For partial TX offload, users need to call rte_eth_tx_prepare() to
invoke the tx_prepare callback of PMDs. In this callback, the PMDs
adjust the packet based on the offloading used by the user. (e.g. For
some PMDs, pseudo-headers need to be calculated when the TX cksum is
offloaded.)
However, for the users, they cannot grasp all the hardware and PMDs
characteristics. As a result, users cannot decide when they need to
actually call tx_prepare. Therefore, we should assume that the user
calls rte_eth_tx_prepare() when using any Tx offloading to ensure that
related functions work properly. Whether packets need to be adjusted
should be determined by PMDs. They can make judgments in the
dev_configure or queue_setup phase. When the related function is not
used, the pointer of tx_prepare should be set to NULL to reduce the
performance loss caused by invoking rte_eth_tx_repare().
In this patch, if tx_prepare is not required for the offloading used by
the users, the tx_prepare pointer will be set to NULL.
Fixes:
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|---|---|---|
| .ci | ||
| .github/workflows | ||
| app | ||
| buildtools | ||
| config | ||
| devtools | ||
| doc | ||
| drivers | ||
| examples | ||
| kernel | ||
| lib | ||
| license | ||
| usertools | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| ABI_VERSION | ||
| MAINTAINERS | ||
| Makefile | ||
| meson_options.txt | ||
| meson.build | ||
| README | ||
| VERSION | ||
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