X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fnet%2Fsfc%2Fsfc_tweak.h;fp=drivers%2Fnet%2Fsfc%2Fsfc_tweak.h;h=4ef7fc8b41796c33293b5261795522f4dbd44b39;hb=7595afa4d30097c1177b69257118d8ad89a539be;hp=0000000000000000000000000000000000000000;hpb=ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6;p=deb_dpdk.git

diff --git a/drivers/net/sfc/sfc_tweak.h b/drivers/net/sfc/sfc_tweak.h
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+++ b/drivers/net/sfc/sfc_tweak.h
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+/*-
+ *   BSD LICENSE
+ *
+ * Copyright (c) 2016-2017 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SFC_TWEAK_H_
+#define _SFC_TWEAK_H_
+
+/*
+ * The header is intended to collect defines/constants which could be
+ * tweaked to improve the PMD performance characteristics depending on
+ * the usecase or requirements (CPU load, packet rate, latency).
+ */
+
+/**
+ * Number of Rx descriptors in the bulk submitted on Rx ring refill.
+ */
+#define SFC_RX_REFILL_BULK	(RTE_CACHE_LINE_SIZE / sizeof(efx_qword_t))
+
+/**
+ * Make the transmit path reap at least one time per a burst;
+ * this improves cache locality because the same mbufs may be used to send
+ * subsequent bursts in certain cases because of well-timed reap
+ */
+#define SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE	0
+
+/** Default free threshold follows recommendations from DPDK documentation */
+#define SFC_TX_DEFAULT_FREE_THRESH	32
+
+#endif /* _SFC_TWEAK_H_ */