1 files changed, 45 insertions, 0 deletions
diff --git a/src/spdk/dpdk/drivers/net/sfc/sfc_tweak.h b/src/spdk/dpdk/drivers/net/sfc/sfc_tweak.h
new file mode 100644
index 00000000..4d543f68
--- /dev/null
+++ b/src/spdk/dpdk/drivers/net/sfc/sfc_tweak.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2016-2018 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ */
+
+#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
+
+/** Number of mbufs to be freed in bulk in a single call */
+#define SFC_TX_REAP_BULK_SIZE		32
+
+/**
+ * Default head-of-line block timeout to wait for Rx descriptor before
+ * packet drop because of no descriptors available.
+ *
+ * DPDK FW variant only with equal stride super-buffer Rx mode.
+ */
+#define SFC_RXD_WAIT_TIMEOUT_NS_DEF	(200U * 1000)
+
+#endif /* _SFC_TWEAK_H_ */