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Before this patch, implementation details and configuration of hairpin queues were decided internally by the PMD. Applications had no control over the configuration of Rx and Tx hairpin queues, despite number of descriptors, explicit Tx flow mode and disabling automatic binding. This patch addresses that by adding: - Hairpin queue capabilities reported by PMDs. - New configuration options for Rx and Tx hairpin queues. Main goal of this patch is to allow applications to provide configuration hints regarding placement of hairpin queues. These hints specify whether buffers of hairpin queues should be placed in host memory or in dedicated device memory. Different memory options may have different performance characteristics and hairpin configuration should be fine-tuned to the specific application and use case. This patch introduces new hairpin queue configuration options through rte_eth_hairpin_conf struct, allowing to tune Rx and Tx hairpin queues memory configuration. Hairpin configuration is extended with the following fields: - use_locked_device_memory - If set, PMD will use specialized on-device memory to store RX or TX hairpin queue data. - use_rte_memory - If set, PMD will use DPDK-managed memory to store RX or TX hairpin queue data. - force_memory - If set, PMD will be forced to use provided memory settings. If no appropriate resources are available, then device start will fail. If unset and no resources are available, PMD will fallback to using default type of resource for given queue. If application chooses to use PMD default memory configuration, all of these flags should remain unset. Hairpin capabilities are also extended, to allow verification of support of given hairpin memory configurations. Struct rte_eth_hairpin_cap is extended with two additional fields of type rte_eth_hairpin_queue_cap: - rx_cap - memory capabilities of hairpin RX queues. - tx_cap - memory capabilities of hairpin TX queues. Struct rte_eth_hairpin_queue_cap exposes whether given queue type supports use_locked_device_memory and use_rte_memory flags. Signed-off-by: Dariusz Sosnowski <dsosnowski@nvidia.com> |
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| app | ||
| buildtools | ||
| config | ||
| devtools | ||
| doc | ||
| drivers | ||
| examples | ||
| kernel | ||
| lib | ||
| license | ||
| usertools | ||
| .editorconfig | ||
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| 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