c305090bba
Replacing the variable countdown (which depends on the number of descriptors) with a fixed relative threshold known at compile time improves performance by reducing the TX queue structure footprint and the amount of code to manage completions during a burst. Completions are now requested at most once per burst after threshold is reached. Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com> Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com> Signed-off-by: Vasily Philipov <vasilyf@mellanox.com>
83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2015 6WIND S.A.
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* Copyright 2015 Mellanox.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND S.A. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RTE_PMD_MLX5_DEFS_H_
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#define RTE_PMD_MLX5_DEFS_H_
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#include "mlx5_autoconf.h"
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/* Reported driver name. */
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#define MLX5_DRIVER_NAME "librte_pmd_mlx5"
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/* Maximum number of simultaneous MAC addresses. */
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#define MLX5_MAX_MAC_ADDRESSES 128
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/* Maximum number of simultaneous VLAN filters. */
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#define MLX5_MAX_VLAN_IDS 128
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/* Maximum number of special flows. */
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#define MLX5_MAX_SPECIAL_FLOWS 4
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/*
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* Request TX completion every time descriptors reach this threshold since
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* the previous request. Must be a power of two for performance reasons.
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*/
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#define MLX5_TX_COMP_THRESH 32
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/* RSS Indirection table size. */
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#define RSS_INDIRECTION_TABLE_SIZE 256
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/*
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* Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
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* from which buffers are to be transmitted will have to be mapped by this
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* driver to their own Memory Region (MR). This is a slow operation.
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*
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* This value is always 1 for RX queues.
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*/
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#ifndef MLX5_PMD_TX_MP_CACHE
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#define MLX5_PMD_TX_MP_CACHE 8
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#endif
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/*
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* If defined, only use software counters. The PMD will never ask the hardware
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* for these, and many of them won't be available.
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*/
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#ifndef MLX5_PMD_SOFT_COUNTERS
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#define MLX5_PMD_SOFT_COUNTERS 1
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#endif
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/* Alarm timeout. */
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#define MLX5_ALARM_TIMEOUT_US 100000
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#endif /* RTE_PMD_MLX5_DEFS_H_ */
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