telemetry: introduce infrastructure

This patch adds the infrastructure and initial code for the telemetry
library.

The telemetry init is registered with eal_init(). We can then check to see
if --telemetry was passed as an eal option. If --telemetry was parsed, then
we call telemetry init at the end of eal init.

Control threads are used to get CPU cycles for telemetry, which are
configured in this patch also.

Signed-off-by: Ciara Power <ciara.power@intel.com>
Signed-off-by: Brian Archbold <brian.archbold@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/lib/librte_telemetry/rte_telemetry.h b/lib/librte_telemetry/rte_telemetry.h
new file mode 100644
index 0000000..97674ae
--- /dev/null
+++ b/lib/librte_telemetry/rte_telemetry.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <stdint.h>
+
+#ifndef _RTE_TELEMETRY_H_
+#define _RTE_TELEMETRY_H_
+
+/**
+ * @file
+ * RTE Telemetry
+ *
+ * The telemetry library provides a method to retrieve statistics from
+ * DPDK by sending a JSON encoded message over a socket. DPDK will send
+ * a JSON encoded response containing telemetry data.
+ ***/
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Initialize Telemetry
+ *
+ * @return
+ *  0 on successful initialisation.
+ * @return
+ *  -ENOMEM on memory allocation error
+ * @return
+ *  -EPERM on unknown error failure
+ * @return
+ *  -EALREADY if Telemetry is already initialised.
+ */
+int32_t __rte_experimental
+rte_telemetry_init(void);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Clean up and free memory.
+ *
+ * @return
+ *  0 on success
+ * @return
+ *  -EPERM on failure
+ */
+int32_t __rte_experimental
+rte_telemetry_cleanup(void);
+
+#endif