bitrate: add bitrate statistics library

[dpdk.git] / lib / librte_bitratestats / rte_bitrate.h

diff --git a/lib/librte_bitratestats/rte_bitrate.h b/lib/librte_bitratestats/rte_bitrate.h
new file mode 100644 (file)
index 0000000..b9f11bd
--- /dev/null
+++ b/lib/librte_bitratestats/rte_bitrate.h
@@ -0,0 +1,84 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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 _RTE_BITRATE_H_
+#define _RTE_BITRATE_H_
+
+/**
+ *  Bitrate statistics data structure.
+ *  This data structure is intentionally opaque.
+ */
+struct rte_stats_bitrates;
+
+
+/**
+ * Allocate a bitrate statistics structure
+ *
+ * @return
+ *   - Pointer to structure on success
+ *   - NULL on error (zmalloc failure)
+ */
+struct rte_stats_bitrates *rte_stats_bitrate_create(void);
+
+
+/**
+ * Register bitrate statistics with the metric library.
+ *
+ * @param bitrate_data
+ *   Pointer allocated by rte_stats_create()
+ *
+ * @return
+ *   Zero on success
+ *   Negative on error
+ */
+int rte_stats_bitrate_reg(struct rte_stats_bitrates *bitrate_data);
+
+
+/**
+ * Calculate statistics for current time window. The period with which
+ * this function is called should be the intended sampling window width.
+ *
+ * @param bitrate_data
+ *   Bitrate statistics data pointer
+ *
+ * @param port_id
+ *   Port id to calculate statistics for
+ *
+ * @return
+ *  - Zero on success
+ *  - Negative value on error
+ */
+int rte_stats_bitrate_calc(struct rte_stats_bitrates *bitrate_data,
+       uint8_t port_id);
+
+#endif /* _RTE_BITRATE_H_ */