44c0947bae
Change license from BSD-2-Clause to BSD-3-Clause. Bump copyright year. Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com> Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2016-2018 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was jointly developed between OKTET Labs (under contract
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* for Solarflare) and Solarflare Communications, Inc.
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*/
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#ifndef _SFC_TWEAK_H_
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#define _SFC_TWEAK_H_
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/*
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* The header is intended to collect defines/constants which could be
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* tweaked to improve the PMD performance characteristics depending on
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* the usecase or requirements (CPU load, packet rate, latency).
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*/
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/**
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* Number of Rx descriptors in the bulk submitted on Rx ring refill.
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*/
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#define SFC_RX_REFILL_BULK (RTE_CACHE_LINE_SIZE / sizeof(efx_qword_t))
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/**
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* Make the transmit path reap at least one time per a burst;
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* this improves cache locality because the same mbufs may be used to send
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* subsequent bursts in certain cases because of well-timed reap
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*/
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#define SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE 0
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/** Default free threshold follows recommendations from DPDK documentation */
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#define SFC_TX_DEFAULT_FREE_THRESH 32
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/** Number of mbufs to be freed in bulk in a single call */
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#define SFC_TX_REAP_BULK_SIZE 32
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#endif /* _SFC_TWEAK_H_ */
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