F: examples/l2fwd-jobstats/
F: doc/guides/sample_app_ug/l2_forward_job_stats.rst
+Metrics
+M: Remy Horton <remy.horton@intel.com>
+F: lib/librte_metrics/
+
Test Applications
-----------------
#
CONFIG_RTE_LIBRTE_JOBSTATS=y
+#
+# Compile the device metrics library
+#
+CONFIG_RTE_LIBRTE_METRICS=y
+
#
# Compile librte_lpm
#
<!--
BSD LICENSE
- Copyright 2013 6WIND S.A.
+ Copyright 2013-2017 6WIND S.A.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
[common] (@ref rte_common.h),
[ABI compat] (@ref rte_compat.h),
[keepalive] (@ref rte_keepalive.h),
+ [device metrics] (@ref rte_metrics.h),
[version] (@ref rte_version.h)
# BSD LICENSE
#
-# Copyright 2013 6WIND S.A.
+# Copyright 2013-2017 6WIND S.A.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
lib/librte_mbuf \
lib/librte_mempool \
lib/librte_meter \
+ lib/librte_metrics \
lib/librte_net \
lib/librte_pdump \
lib/librte_pipeline \
.. BSD LICENSE
- Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
All rights reserved.
Redistribution and use in source and binary forms, with or without
packet_classif_access_ctrl
packet_framework
vhost_lib
+ metrics_lib
port_hotplug_framework
source_org
dev_kit_build_system
--- /dev/null
+.. 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.
+
+.. _Metrics_Library:
+
+Metrics Library
+===============
+
+The Metrics library implements a mechanism by which *producers* can
+publish numeric information for later querying by *consumers*. In
+practice producers will typically be other libraries or primary
+processes, whereas consumers will typically be applications.
+
+Metrics themselves are statistics that are not generated by PMDs. Metric
+information is populated using a push model, where producers update the
+values contained within the metric library by calling an update function
+on the relevant metrics. Consumers receive metric information by querying
+the central metric data, which is held in shared memory.
+
+For each metric, a separate value is maintained for each port id, and
+when publishing metric values the producers need to specify which port is
+being updated. In addition there is a special id ``RTE_METRICS_GLOBAL``
+that is intended for global statistics that are not associated with any
+individual device. Since the metrics library is self-contained, the only
+restriction on port numbers is that they are less than ``RTE_MAX_ETHPORTS``
+- there is no requirement for the ports to actually exist.
+
+Initialising the library
+------------------------
+
+Before the library can be used, it has to be initialized by calling
+``rte_metrics_init()`` which sets up the metric store in shared memory.
+This is where producers will publish metric information to, and where
+consumers will query it from.
+
+.. code-block:: c
+
+ rte_metrics_init(rte_socket_id());
+
+This function **must** be called from a primary process, but otherwise
+producers and consumers can be in either primary or secondary processes.
+
+Registering metrics
+-------------------
+
+Metrics must first be *registered*, which is the way producers declare
+the names of the metrics they will be publishing. Registration can either
+be done individually, or a set of metrics can be registered as a group.
+Individual registration is done using ``rte_metrics_reg_name()``:
+
+.. code-block:: c
+
+ id_1 = rte_metrics_reg_name("mean_bits_in");
+ id_2 = rte_metrics_reg_name("mean_bits_out");
+ id_3 = rte_metrics_reg_name("peak_bits_in");
+ id_4 = rte_metrics_reg_name("peak_bits_out");
+
+or alternatively, a set of metrics can be registered together using
+``rte_metrics_reg_names()``:
+
+.. code-block:: c
+
+ const char * const names[] = {
+ "mean_bits_in", "mean_bits_out",
+ "peak_bits_in", "peak_bits_out",
+ };
+ id_set = rte_metrics_reg_names(&names[0], 4);
+
+If the return value is negative, it means registration failed. Otherwise
+the return value is the *key* for the metric, which is used when updating
+values. A table mapping together these key values and the metrics' names
+can be obtained using ``rte_metrics_get_names()``.
+
+Updating metric values
+----------------------
+
+Once registered, producers can update the metric for a given port using
+the ``rte_metrics_update_value()`` function. This uses the metric key
+that is returned when registering the metric, and can also be looked up
+using ``rte_metrics_get_names()``.
+
+.. code-block:: c
+
+ rte_metrics_update_value(port_id, id_1, values[0]);
+ rte_metrics_update_value(port_id, id_2, values[1]);
+ rte_metrics_update_value(port_id, id_3, values[2]);
+ rte_metrics_update_value(port_id, id_4, values[3]);
+
+if metrics were registered as a single set, they can either be updated
+individually using ``rte_metrics_update_value()``, or updated together
+using the ``rte_metrics_update_values()`` function:
+
+.. code-block:: c
+
+ rte_metrics_update_value(port_id, id_set, values[0]);
+ rte_metrics_update_value(port_id, id_set + 1, values[1]);
+ rte_metrics_update_value(port_id, id_set + 2, values[2]);
+ rte_metrics_update_value(port_id, id_set + 3, values[3]);
+
+ rte_metrics_update_values(port_id, id_set, values, 4);
+
+Note that ``rte_metrics_update_values()`` cannot be used to update
+metric values from *multiple* *sets*, as there is no guarantee two
+sets registered one after the other have contiguous id values.
+
+Querying metrics
+----------------
+
+Consumers can obtain metric values by querying the metrics library using
+the ``rte_metrics_get_values()`` function that return an array of
+``struct rte_metric_value``. Each entry within this array contains a metric
+value and its associated key. A key-name mapping can be obtained using the
+``rte_metrics_get_names()`` function that returns an array of
+``struct rte_metric_name`` that is indexed by the key. The following will
+print out all metrics for a given port:
+
+.. code-block:: c
+
+ void print_metrics() {
+ struct rte_metric_name *names;
+ int len;
+
+ len = rte_metrics_get_names(NULL, 0);
+ if (len < 0) {
+ printf("Cannot get metrics count\n");
+ return;
+ }
+ if (len == 0) {
+ printf("No metrics to display (none have been registered)\n");
+ return;
+ }
+ metrics = malloc(sizeof(struct rte_metric_value) * len);
+ names = malloc(sizeof(struct rte_metric_name) * len);
+ if (metrics == NULL || names == NULL) {
+ printf("Cannot allocate memory\n");
+ free(metrics);
+ free(names);
+ return;
+ }
+ ret = rte_metrics_get_values(port_id, metrics, len);
+ if (ret < 0 || ret > len) {
+ printf("Cannot get metrics values\n");
+ free(metrics);
+ free(names);
+ return;
+ }
+ printf("Metrics for port %i:\n", port_id);
+ for (i = 0; i < len; i++)
+ printf(" %s: %"PRIu64"\n",
+ names[metrics[i].key].name, metrics[i].value);
+ free(metrics);
+ free(names);
+ }
Added the new octeontx ssovf eventdev driver for OCTEONTX devices. See the
"Event Device Drivers" document for more details on this new driver.
+* **Added information metric library.**
+
+ A library that allows information metrics to be added and updated
+ by producers, typically other libraries, for later retrieval by
+ consumers such as applications. It is intended to provide a
+ reporting mechanism that is independent of other libraries such
+ as ethdev.
+
Resolved Issues
---------------
+ librte_mbuf.so.3
librte_mempool.so.2
librte_meter.so.1
+ + librte_metrics.so.1
librte_net.so.1
librte_pdump.so.1
librte_pipeline.so.3
DEPDIRS-librte_ip_frag += librte_hash
DIRS-$(CONFIG_RTE_LIBRTE_JOBSTATS) += librte_jobstats
DEPDIRS-librte_jobstats := librte_eal
+DIRS-$(CONFIG_RTE_LIBRTE_METRICS) += librte_metrics
+DEPDIRS-librte_metrics := librte_eal
DIRS-$(CONFIG_RTE_LIBRTE_POWER) += librte_power
DEPDIRS-librte_power := librte_eal
DIRS-$(CONFIG_RTE_LIBRTE_METER) += librte_meter
--- /dev/null
+# 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.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_metrics.a
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
+
+EXPORT_MAP := rte_metrics_version.map
+
+LIBABIVER := 1
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_METRICS) := rte_metrics.c
+
+# Install header file
+SYMLINK-$(CONFIG_RTE_LIBRTE_METRICS)-include += rte_metrics.h
+
+include $(RTE_SDK)/mk/rte.lib.mk
--- /dev/null
+/*-
+ * 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.
+ */
+
+#include <string.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_metrics.h>
+#include <rte_lcore.h>
+#include <rte_memzone.h>
+#include <rte_spinlock.h>
+
+#define RTE_METRICS_MAX_METRICS 256
+#define RTE_METRICS_MEMZONE_NAME "RTE_METRICS"
+
+/**
+ * Internal stats metadata and value entry.
+ *
+ * @internal
+ */
+struct rte_metrics_meta_s {
+ /** Name of metric */
+ char name[RTE_METRICS_MAX_NAME_LEN];
+ /** Current value for metric */
+ uint64_t value[RTE_MAX_ETHPORTS];
+ /** Used for global metrics */
+ uint64_t global_value;
+ /** Index of next root element (zero for none) */
+ uint16_t idx_next_set;
+ /** Index of next metric in set (zero for none) */
+ uint16_t idx_next_stat;
+};
+
+/**
+ * Internal stats info structure.
+ *
+ * @internal
+ * Offsets into metadata are used instead of pointers because ASLR
+ * means that having the same physical addresses in different
+ * processes is not guaranteed.
+ */
+struct rte_metrics_data_s {
+ /** Index of last metadata entry with valid data.
+ * This value is not valid if cnt_stats is zero.
+ */
+ uint16_t idx_last_set;
+ /** Number of metrics. */
+ uint16_t cnt_stats;
+ /** Metric data memory block. */
+ struct rte_metrics_meta_s metadata[RTE_METRICS_MAX_METRICS];
+ /** Metric data access lock */
+ rte_spinlock_t lock;
+};
+
+void
+rte_metrics_init(int socket_id)
+{
+ struct rte_metrics_data_s *stats;
+ const struct rte_memzone *memzone;
+
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return;
+
+ memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
+ if (memzone != NULL)
+ return;
+ memzone = rte_memzone_reserve(RTE_METRICS_MEMZONE_NAME,
+ sizeof(struct rte_metrics_data_s), socket_id, 0);
+ if (memzone == NULL)
+ rte_exit(EXIT_FAILURE, "Unable to allocate stats memzone\n");
+ stats = memzone->addr;
+ memset(stats, 0, sizeof(struct rte_metrics_data_s));
+ rte_spinlock_init(&stats->lock);
+}
+
+int
+rte_metrics_reg_name(const char *name)
+{
+ const char * const list_names[] = {name};
+
+ return rte_metrics_reg_names(list_names, 1);
+}
+
+int
+rte_metrics_reg_names(const char * const *names, uint16_t cnt_names)
+{
+ struct rte_metrics_meta_s *entry;
+ struct rte_metrics_data_s *stats;
+ const struct rte_memzone *memzone;
+ uint16_t idx_name;
+ uint16_t idx_base;
+
+ /* Some sanity checks */
+ if (cnt_names < 1 || names == NULL)
+ return -EINVAL;
+
+ memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
+ if (memzone == NULL)
+ return -EIO;
+ stats = memzone->addr;
+
+ if (stats->cnt_stats + cnt_names >= RTE_METRICS_MAX_METRICS)
+ return -ENOMEM;
+
+ rte_spinlock_lock(&stats->lock);
+
+ /* Overwritten later if this is actually first set.. */
+ stats->metadata[stats->idx_last_set].idx_next_set = stats->cnt_stats;
+
+ stats->idx_last_set = idx_base = stats->cnt_stats;
+
+ for (idx_name = 0; idx_name < cnt_names; idx_name++) {
+ entry = &stats->metadata[idx_name + stats->cnt_stats];
+ strncpy(entry->name, names[idx_name],
+ RTE_METRICS_MAX_NAME_LEN);
+ memset(entry->value, 0, sizeof(entry->value));
+ entry->idx_next_stat = idx_name + stats->cnt_stats + 1;
+ }
+ entry->idx_next_stat = 0;
+ entry->idx_next_set = 0;
+ stats->cnt_stats += cnt_names;
+
+ rte_spinlock_unlock(&stats->lock);
+
+ return idx_base;
+}
+
+int
+rte_metrics_update_value(int port_id, uint16_t key, const uint64_t value)
+{
+ return rte_metrics_update_values(port_id, key, &value, 1);
+}
+
+int
+rte_metrics_update_values(int port_id,
+ uint16_t key,
+ const uint64_t *values,
+ uint32_t count)
+{
+ struct rte_metrics_meta_s *entry;
+ struct rte_metrics_data_s *stats;
+ const struct rte_memzone *memzone;
+ uint16_t idx_metric;
+ uint16_t idx_value;
+ uint16_t cnt_setsize;
+
+ if (port_id != RTE_METRICS_GLOBAL &&
+ (port_id < 0 || port_id > RTE_MAX_ETHPORTS))
+ return -EINVAL;
+
+ if (values == NULL)
+ return -EINVAL;
+
+ memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
+ if (memzone == NULL)
+ return -EIO;
+ stats = memzone->addr;
+
+ rte_spinlock_lock(&stats->lock);
+ idx_metric = key;
+ cnt_setsize = 1;
+ while (idx_metric < stats->cnt_stats) {
+ entry = &stats->metadata[idx_metric];
+ if (entry->idx_next_stat == 0)
+ break;
+ cnt_setsize++;
+ idx_metric++;
+ }
+ /* Check update does not cross set border */
+ if (count > cnt_setsize) {
+ rte_spinlock_unlock(&stats->lock);
+ return -ERANGE;
+ }
+
+ if (port_id == RTE_METRICS_GLOBAL)
+ for (idx_value = 0; idx_value < count; idx_value++) {
+ idx_metric = key + idx_value;
+ stats->metadata[idx_metric].global_value =
+ values[idx_value];
+ }
+ else
+ for (idx_value = 0; idx_value < count; idx_value++) {
+ idx_metric = key + idx_value;
+ stats->metadata[idx_metric].value[port_id] =
+ values[idx_value];
+ }
+ rte_spinlock_unlock(&stats->lock);
+ return 0;
+}
+
+int
+rte_metrics_get_names(struct rte_metric_name *names,
+ uint16_t capacity)
+{
+ struct rte_metrics_data_s *stats;
+ const struct rte_memzone *memzone;
+ uint16_t idx_name;
+ int return_value;
+
+ memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
+ /* If not allocated, fail silently */
+ if (memzone == NULL)
+ return 0;
+
+ stats = memzone->addr;
+ rte_spinlock_lock(&stats->lock);
+ if (names != NULL) {
+ if (capacity < stats->cnt_stats) {
+ return_value = stats->cnt_stats;
+ rte_spinlock_unlock(&stats->lock);
+ return return_value;
+ }
+ for (idx_name = 0; idx_name < stats->cnt_stats; idx_name++)
+ strncpy(names[idx_name].name,
+ stats->metadata[idx_name].name,
+ RTE_METRICS_MAX_NAME_LEN);
+ }
+ return_value = stats->cnt_stats;
+ rte_spinlock_unlock(&stats->lock);
+ return return_value;
+}
+
+int
+rte_metrics_get_values(int port_id,
+ struct rte_metric_value *values,
+ uint16_t capacity)
+{
+ struct rte_metrics_meta_s *entry;
+ struct rte_metrics_data_s *stats;
+ const struct rte_memzone *memzone;
+ uint16_t idx_name;
+ int return_value;
+
+ if (port_id != RTE_METRICS_GLOBAL &&
+ (port_id < 0 || port_id > RTE_MAX_ETHPORTS))
+ return -EINVAL;
+
+ memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
+ /* If not allocated, fail silently */
+ if (memzone == NULL)
+ return 0;
+ stats = memzone->addr;
+ rte_spinlock_lock(&stats->lock);
+
+ if (values != NULL) {
+ if (capacity < stats->cnt_stats) {
+ return_value = stats->cnt_stats;
+ rte_spinlock_unlock(&stats->lock);
+ return return_value;
+ }
+ if (port_id == RTE_METRICS_GLOBAL)
+ for (idx_name = 0;
+ idx_name < stats->cnt_stats;
+ idx_name++) {
+ entry = &stats->metadata[idx_name];
+ values[idx_name].key = idx_name;
+ values[idx_name].value = entry->global_value;
+ }
+ else
+ for (idx_name = 0;
+ idx_name < stats->cnt_stats;
+ idx_name++) {
+ entry = &stats->metadata[idx_name];
+ values[idx_name].key = idx_name;
+ values[idx_name].value = entry->value[port_id];
+ }
+ }
+ return_value = stats->cnt_stats;
+ rte_spinlock_unlock(&stats->lock);
+ return return_value;
+}
--- /dev/null
+/*-
+ * 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.
+ */
+
+/**
+ * @file
+ *
+ * DPDK Metrics module
+ *
+ * Metrics are statistics that are not generated by PMDs, and hence
+ * are better reported through a mechanism that is independent from
+ * the ethdev-based extended statistics. Providers will typically
+ * be other libraries and consumers will typically be applications.
+ *
+ * Metric information is populated using a push model, where producers
+ * update the values contained within the metric library by calling
+ * an update function on the relevant metrics. Consumers receive
+ * metric information by querying the central metric data, which is
+ * held in shared memory. Currently only bulk querying of metrics
+ * by consumers is supported.
+ */
+
+#ifndef _RTE_METRICS_H_
+#define _RTE_METRICS_H_
+
+/** Maximum length of metric name (including null-terminator) */
+#define RTE_METRICS_MAX_NAME_LEN 64
+
+/**
+ * Global metric special id.
+ *
+ * When used for the port_id parameter when calling
+ * rte_metrics_update_metric() or rte_metrics_update_metric(),
+ * the global metric, which are not associated with any specific
+ * port (i.e. device), are updated.
+ */
+#define RTE_METRICS_GLOBAL -1
+
+
+/**
+ * A name-key lookup for metrics.
+ *
+ * An array of this structure is returned by rte_metrics_get_names().
+ * The struct rte_metric_value references these names via their array index.
+ */
+struct rte_metric_name {
+ /** String describing metric */
+ char name[RTE_METRICS_MAX_NAME_LEN];
+};
+
+
+/**
+ * Metric value structure.
+ *
+ * This structure is used by rte_metrics_get_values() to return metrics,
+ * which are statistics that are not generated by PMDs. It maps a name key,
+ * which corresponds to an index in the array returned by
+ * rte_metrics_get_names().
+ */
+struct rte_metric_value {
+ /** Numeric identifier of metric. */
+ uint16_t key;
+ /** Value for metric */
+ uint64_t value;
+};
+
+
+/**
+ * Initializes metric module. This function must be called from
+ * a primary process before metrics are used.
+ *
+ * @param socket_id
+ * Socket to use for shared memory allocation.
+ */
+void rte_metrics_init(int socket_id);
+
+/**
+ * Register a metric, making it available as a reporting parameter.
+ *
+ * Registering a metric is the way producers declare a parameter
+ * that they wish to be reported. Once registered, the associated
+ * numeric key can be obtained via rte_metrics_get_names(), which
+ * is required for updating said metric's value.
+ *
+ * @param name
+ * Metric name
+ *
+ * @return
+ * - Zero or positive: Success (index key of new metric)
+ * - -EIO: Error, unable to access metrics shared memory
+ * (rte_metrics_init() not called)
+ * - -EINVAL: Error, invalid parameters
+ * - -ENOMEM: Error, maximum metrics reached
+ */
+int rte_metrics_reg_name(const char *name);
+
+/**
+ * Register a set of metrics.
+ *
+ * This is a bulk version of rte_metrics_reg_names() and aside from
+ * handling multiple keys at once is functionally identical.
+ *
+ * @param names
+ * List of metric names
+ *
+ * @param cnt_names
+ * Number of metrics in set
+ *
+ * @return
+ * - Zero or positive: Success (index key of start of set)
+ * - -EIO: Error, unable to access metrics shared memory
+ * (rte_metrics_init() not called)
+ * - -EINVAL: Error, invalid parameters
+ * - -ENOMEM: Error, maximum metrics reached
+ */
+int rte_metrics_reg_names(const char * const *names, uint16_t cnt_names);
+
+/**
+ * Get metric name-key lookup table.
+ *
+ * @param names
+ * A struct rte_metric_name array of at least *capacity* in size to
+ * receive key names. If this is NULL, function returns the required
+ * number of elements for this array.
+ *
+ * @param capacity
+ * Size (number of elements) of struct rte_metric_name array.
+ * Disregarded if names is NULL.
+ *
+ * @return
+ * - Positive value above capacity: error, *names* is too small.
+ * Return value is required size.
+ * - Positive value equal or less than capacity: Success. Return
+ * value is number of elements filled in.
+ * - Negative value: error.
+ */
+int rte_metrics_get_names(
+ struct rte_metric_name *names,
+ uint16_t capacity);
+
+/**
+ * Get metric value table.
+ *
+ * @param port_id
+ * Port id to query
+ *
+ * @param values
+ * A struct rte_metric_value array of at least *capacity* in size to
+ * receive metric ids and values. If this is NULL, function returns
+ * the required number of elements for this array.
+ *
+ * @param capacity
+ * Size (number of elements) of struct rte_metric_value array.
+ * Disregarded if names is NULL.
+ *
+ * @return
+ * - Positive value above capacity: error, *values* is too small.
+ * Return value is required size.
+ * - Positive value equal or less than capacity: Success. Return
+ * value is number of elements filled in.
+ * - Negative value: error.
+ */
+int rte_metrics_get_values(
+ int port_id,
+ struct rte_metric_value *values,
+ uint16_t capacity);
+
+/**
+ * Updates a metric
+ *
+ * @param port_id
+ * Port to update metrics for
+ * @param key
+ * Id of metric to update
+ * @param value
+ * New value
+ *
+ * @return
+ * - -EIO if unable to access shared metrics memory
+ * - Zero on success
+ */
+int rte_metrics_update_value(
+ int port_id,
+ uint16_t key,
+ const uint64_t value);
+
+/**
+ * Updates a metric set. Note that it is an error to try to
+ * update across a set boundary.
+ *
+ * @param port_id
+ * Port to update metrics for
+ * @param key
+ * Base id of metrics set to update
+ * @param values
+ * Set of new values
+ * @param count
+ * Number of new values
+ *
+ * @return
+ * - -ERANGE if count exceeds metric set size
+ * - -EIO if unable to access shared metrics memory
+ * - Zero on success
+ */
+int rte_metrics_update_values(
+ int port_id,
+ uint16_t key,
+ const uint64_t *values,
+ uint32_t count);
+
+#endif
--- /dev/null
+DPDK_17.05 {
+ global:
+
+ rte_metrics_get_names;
+ rte_metrics_get_values;
+ rte_metrics_init;
+ rte_metrics_reg_name;
+ rte_metrics_reg_names;
+ rte_metrics_update_value;
+ rte_metrics_update_values;
+
+ local: *;
+};
_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_POWER) += -lrte_power
_LDLIBS-$(CONFIG_RTE_LIBRTE_TIMER) += -lrte_timer
git.droids-corp.org / dpdk.git / commitdiff