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By default, Verbs maps the doorbell register to write combining. Working with write combining is useful for drivers which use blue flame for the doorbell write. Since mlx5 PMD uses only doorbells and write combining mapping requires an extra memory barrier to flush the doorbell after its write, setting the mapping to un-cached by default. Such change is expected to reduce the max and average round trip latency. Signed-off-by: Shahaf Shuler <shahafs@mellanox.com> Signed-off-by: Yongseok Koh <yskoh@mellanox.com> Signed-off-by: Alexander Solganik <solganik@gmail.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.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