[dpdk-dev] [PATCH v9 03/12] telemetry: initial telemetry infrastructure

Harry van Haaren harry.van.haaren at intel.com
Sat Oct 27 01:59:24 CEST 2018


From: Ciara Power <ciara.power at intel.com>

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

---

v9:
- Add telemetry.h to doxygen index/conf (Thomas)
- Add @file section to telemetry.h for Doxygen (Thomas)
- Move -ljansson to patch that introduces json_* calls (Thomas)
---
 config/common_base                            |   5 +
 doc/api/doxy-api-index.md                     |   3 +-
 doc/api/doxy-api.conf.in                      |   1 +
 lib/Makefile                                  |   2 +
 lib/librte_telemetry/Makefile                 |  27 ++++
 lib/librte_telemetry/meson.build              |   7 +
 lib/librte_telemetry/rte_telemetry.c          | 123 ++++++++++++++++++
 lib/librte_telemetry/rte_telemetry.h          |  51 ++++++++
 lib/librte_telemetry/rte_telemetry_internal.h |  32 +++++
 .../rte_telemetry_version.map                 |   8 ++
 lib/meson.build                               |   2 +-
 mk/rte.app.mk                                 |   3 +-
 mk/rte.vars.mk                                |   6 +
 13 files changed, 267 insertions(+), 3 deletions(-)
 create mode 100644 lib/librte_telemetry/Makefile
 create mode 100644 lib/librte_telemetry/meson.build
 create mode 100644 lib/librte_telemetry/rte_telemetry.c
 create mode 100644 lib/librte_telemetry/rte_telemetry.h
 create mode 100644 lib/librte_telemetry/rte_telemetry_internal.h
 create mode 100644 lib/librte_telemetry/rte_telemetry_version.map

diff --git a/config/common_base b/config/common_base
index 38beaabb3..4236b7f46 100644
--- a/config/common_base
+++ b/config/common_base
@@ -756,6 +756,11 @@ CONFIG_RTE_LIBRTE_CMDLINE_DEBUG=n
 CONFIG_RTE_LIBRTE_HASH=y
 CONFIG_RTE_LIBRTE_HASH_DEBUG=n
 
+#
+# Compile librte_telemetry
+#
+CONFIG_RTE_LIBRTE_TELEMETRY=y
+
 #
 # Compile librte_efd
 #
diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index a3039d168..0d0b9bd6c 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -159,7 +159,8 @@ The public API headers are grouped by topics:
   [hexdump]            (@ref rte_hexdump.h),
   [debug]              (@ref rte_debug.h),
   [log]                (@ref rte_log.h),
-  [errno]              (@ref rte_errno.h)
+  [errno]              (@ref rte_errno.h),
+  [telemetry]          (@ref rte_telemetry.h)
 
 - **misc**:
   [EAL config]         (@ref rte_eal.h),
diff --git a/doc/api/doxy-api.conf.in b/doc/api/doxy-api.conf.in
index 3b652ac9c..77ba327a8 100644
--- a/doc/api/doxy-api.conf.in
+++ b/doc/api/doxy-api.conf.in
@@ -56,6 +56,7 @@ INPUT                   = @TOPDIR@/doc/api/doxy-api-index.md \
                           @TOPDIR@/lib/librte_sched \
                           @TOPDIR@/lib/librte_security \
                           @TOPDIR@/lib/librte_table \
+                          @TOPDIR@/lib/librte_telemetry \
                           @TOPDIR@/lib/librte_timer \
                           @TOPDIR@/lib/librte_vhost
 INPUT                   += @API_EXAMPLES@
diff --git a/lib/Makefile b/lib/Makefile
index 062cbdfd7..b7370ef97 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -106,6 +106,8 @@ DEPDIRS-librte_gso := librte_eal librte_mbuf librte_ethdev librte_net
 DEPDIRS-librte_gso += librte_mempool
 DIRS-$(CONFIG_RTE_LIBRTE_BPF) += librte_bpf
 DEPDIRS-librte_bpf := librte_eal librte_mempool librte_mbuf librte_ethdev
+DIRS-$(CONFIG_RTE_LIBRTE_TELEMETRY) += librte_telemetry
+DEPDIRS-librte_telemetry := librte_eal librte_metrics librte_ethdev
 
 ifeq ($(CONFIG_RTE_EXEC_ENV_LINUXAPP),y)
 DIRS-$(CONFIG_RTE_LIBRTE_KNI) += librte_kni
diff --git a/lib/librte_telemetry/Makefile b/lib/librte_telemetry/Makefile
new file mode 100644
index 000000000..a2d4ff166
--- /dev/null
+++ b/lib/librte_telemetry/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Intel Corporation
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_telemetry.a
+
+CFLAGS += -O3
+CFLAGS += -I$(SRCDIR)
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
+LDLIBS += -lrte_eal -lrte_ethdev
+LDLIBS += -lrte_metrics
+LDLIBS += -lpthread
+
+EXPORT_MAP := rte_telemetry_version.map
+
+LIBABIVER := 1
+
+# library source files
+SRCS-$(CONFIG_RTE_LIBRTE_TELEMETRY) := rte_telemetry.c
+
+# export include files
+SYMLINK-$(CONFIG_RTE_LIBRTE_TELEMETRY)-include := rte_telemetry.h
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_telemetry/meson.build b/lib/librte_telemetry/meson.build
new file mode 100644
index 000000000..7716076a9
--- /dev/null
+++ b/lib/librte_telemetry/meson.build
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Intel Corporation
+
+sources = files('rte_telemetry.c')
+headers = files('rte_telemetry.h', 'rte_telemetry_internal.h')
+deps += ['metrics', 'ethdev']
+cflags += '-DALLOW_EXPERIMENTAL_API'
diff --git a/lib/librte_telemetry/rte_telemetry.c b/lib/librte_telemetry/rte_telemetry.c
new file mode 100644
index 000000000..7f4ad0342
--- /dev/null
+++ b/lib/librte_telemetry/rte_telemetry.c
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <unistd.h>
+#include <pthread.h>
+
+#include <rte_eal.h>
+#include <rte_ethdev.h>
+#include <rte_metrics.h>
+#include <rte_option.h>
+
+#include "rte_telemetry.h"
+#include "rte_telemetry_internal.h"
+
+#define SLEEP_TIME 10
+
+static telemetry_impl *static_telemetry;
+
+static int32_t
+rte_telemetry_run(void *userdata)
+{
+	struct telemetry_impl *telemetry = userdata;
+
+	if (telemetry == NULL) {
+		TELEMETRY_LOG_WARN("TELEMETRY could not be initialised");
+		return -1;
+	}
+
+	return 0;
+}
+
+static void
+*rte_telemetry_run_thread_func(void *userdata)
+{
+	int ret;
+	struct telemetry_impl *telemetry = userdata;
+
+	if (telemetry == NULL) {
+		TELEMETRY_LOG_ERR("%s passed a NULL instance", __func__);
+		pthread_exit(0);
+	}
+
+	while (telemetry->thread_status) {
+		rte_telemetry_run(telemetry);
+		ret = usleep(SLEEP_TIME);
+		if (ret < 0)
+			TELEMETRY_LOG_ERR("Calling thread could not be put to sleep");
+	}
+	pthread_exit(0);
+}
+
+int32_t __rte_experimental
+rte_telemetry_init()
+{
+	int ret;
+	pthread_attr_t attr;
+	const char *telemetry_ctrl_thread = "telemetry";
+
+	if (static_telemetry) {
+		TELEMETRY_LOG_WARN("TELEMETRY structure already initialised");
+		return -EALREADY;
+	}
+
+	static_telemetry = calloc(1, sizeof(struct telemetry_impl));
+	if (static_telemetry == NULL) {
+		TELEMETRY_LOG_ERR("Memory could not be allocated");
+		return -ENOMEM;
+	}
+
+	static_telemetry->socket_id = rte_socket_id();
+	rte_metrics_init(static_telemetry->socket_id);
+
+	ret = pthread_attr_init(&attr);
+	if (ret != 0) {
+		TELEMETRY_LOG_ERR("Pthread attribute init failed");
+		return -EPERM;
+	}
+
+	ret = rte_ctrl_thread_create(&static_telemetry->thread_id,
+		telemetry_ctrl_thread, &attr, rte_telemetry_run_thread_func,
+		(void *)static_telemetry);
+	static_telemetry->thread_status = 1;
+
+	if (ret < 0) {
+		ret = rte_telemetry_cleanup();
+		if (ret < 0)
+			TELEMETRY_LOG_ERR("TELEMETRY cleanup failed");
+		return -EPERM;
+	}
+
+	return 0;
+}
+
+int32_t __rte_experimental
+rte_telemetry_cleanup(void)
+{
+	struct telemetry_impl *telemetry = static_telemetry;
+	telemetry->thread_status = 0;
+	pthread_join(telemetry->thread_id, NULL);
+	free(telemetry);
+	static_telemetry = NULL;
+	return 0;
+}
+
+int telemetry_log_level;
+RTE_INIT(rte_telemetry_register);
+
+static struct rte_option option = {
+	.opt_str = "--telemetry",
+	.cb = &rte_telemetry_init,
+	.enabled = 0
+};
+
+static void
+rte_telemetry_register(void)
+{
+	telemetry_log_level = rte_log_register("lib.telemetry");
+	if (telemetry_log_level >= 0)
+		rte_log_set_level(telemetry_log_level, RTE_LOG_ERR);
+
+	rte_option_register(&option);
+}
diff --git a/lib/librte_telemetry/rte_telemetry.h b/lib/librte_telemetry/rte_telemetry.h
new file mode 100644
index 000000000..97674ae2d
--- /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
diff --git a/lib/librte_telemetry/rte_telemetry_internal.h b/lib/librte_telemetry/rte_telemetry_internal.h
new file mode 100644
index 000000000..4e810a84c
--- /dev/null
+++ b/lib/librte_telemetry/rte_telemetry_internal.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <rte_log.h>
+
+#ifndef _RTE_TELEMETRY_INTERNAL_H_
+#define _RTE_TELEMETRY_INTERNAL_H_
+
+/* Logging Macros */
+extern int telemetry_log_level;
+
+#define TELEMETRY_LOG(level, fmt, args...) \
+	rte_log(RTE_LOG_ ##level, telemetry_log_level, "%s(): "fmt "\n", \
+		__func__, ##args)
+
+#define TELEMETRY_LOG_ERR(fmt, args...) \
+	TELEMETRY_LOG(ERR, fmt, ## args)
+
+#define TELEMETRY_LOG_WARN(fmt, args...) \
+	TELEMETRY_LOG(WARNING, fmt, ## args)
+
+#define TELEMETRY_LOG_INFO(fmt, args...) \
+	TELEMETRY_LOG(INFO, fmt, ## args)
+
+typedef struct telemetry_impl {
+	pthread_t thread_id;
+	int thread_status;
+	uint32_t socket_id;
+} telemetry_impl;
+
+#endif
diff --git a/lib/librte_telemetry/rte_telemetry_version.map b/lib/librte_telemetry/rte_telemetry_version.map
new file mode 100644
index 000000000..bbcd9a796
--- /dev/null
+++ b/lib/librte_telemetry/rte_telemetry_version.map
@@ -0,0 +1,8 @@
+EXPERIMENTAL {
+	global:
+
+	rte_telemetry_cleanup;
+	rte_telemetry_init;
+
+	local: *;
+};
diff --git a/lib/meson.build b/lib/meson.build
index 2b903fa37..9d1f353d2 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -25,7 +25,7 @@ libraries = [ 'compat', # just a header, used for versioning
 	# add pkt framework libs which use other libs from above
 	'port', 'table', 'pipeline',
 	# flow_classify lib depends on pkt framework table lib
-	'flow_classify', 'bpf']
+	'flow_classify', 'bpf', 'telemetry']
 
 default_cflags = machine_args
 if cc.has_argument('-Wno-format-truncation')
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index c0036daf8..c5aaa9da5 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -51,7 +51,6 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_ACL)            += --whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_ACL)            += -lrte_acl
 _LDLIBS-$(CONFIG_RTE_LIBRTE_ACL)            += --no-whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_JOBSTATS)       += -lrte_jobstats
-_LDLIBS-$(CONFIG_RTE_LIBRTE_METRICS)        += -lrte_metrics
 _LDLIBS-$(CONFIG_RTE_LIBRTE_BITRATE)        += -lrte_bitratestats
 _LDLIBS-$(CONFIG_RTE_LIBRTE_LATENCY_STATS)  += -lrte_latencystats
 _LDLIBS-$(CONFIG_RTE_LIBRTE_POWER)          += -lrte_power
@@ -80,6 +79,8 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_SECURITY)       += -lrte_security
 _LDLIBS-$(CONFIG_RTE_LIBRTE_COMPRESSDEV)    += -lrte_compressdev
 _LDLIBS-$(CONFIG_RTE_LIBRTE_EVENTDEV)       += -lrte_eventdev
 _LDLIBS-$(CONFIG_RTE_LIBRTE_RAWDEV)         += -lrte_rawdev
+_LDLIBS-$(CONFIG_RTE_LIBRTE_METRICS)        += -lrte_metrics
+_LDLIBS-$(CONFIG_RTE_LIBRTE_TELEMETRY)      += -lrte_telemetry -ljansson
 _LDLIBS-$(CONFIG_RTE_LIBRTE_TIMER)          += -lrte_timer
 _LDLIBS-$(CONFIG_RTE_LIBRTE_MEMPOOL)        += -lrte_mempool
 _LDLIBS-$(CONFIG_RTE_DRIVER_MEMPOOL_RING)   += -lrte_mempool_ring
diff --git a/mk/rte.vars.mk b/mk/rte.vars.mk
index 07b0db127..603972c3c 100644
--- a/mk/rte.vars.mk
+++ b/mk/rte.vars.mk
@@ -52,6 +52,12 @@ ifneq ($(CONFIG_RTE_LIBRTE_E1000_PMD),y)
   CONFIG_RTE_LIBRTE_E1000_PMD = $(CONFIG_RTE_LIBRTE_EM_PMD)
 endif
 
+JANSSON := $(shell pkg-config --exists jansson; echo $$?)
+ifneq ($(JANSSON),0)
+$(warning Jansson not found, disabling RTE_LIBRTE_TELEMETRY)
+CONFIG_RTE_LIBRTE_TELEMETRY = n
+endif
+
 ifeq ($(RTE_ARCH),)
 $(error RTE_ARCH is not defined)
 endif
-- 
2.17.1



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