DPDK 22.11.6
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#include <stdint.h>
Go to the source code of this file.
Data Structures | |
struct | rte_metric_name |
struct | rte_metric_value |
Macros | |
#define | RTE_METRICS_MAX_NAME_LEN 64 |
#define | RTE_METRICS_GLOBAL -1 |
Functions | |
int | rte_metrics_init (int socket_id) |
int | rte_metrics_deinit (void) |
int | rte_metrics_reg_name (const char *name) |
int | rte_metrics_reg_names (const char *const *names, uint16_t cnt_names) |
int | rte_metrics_get_names (struct rte_metric_name *names, uint16_t capacity) |
int | rte_metrics_get_values (int port_id, struct rte_metric_value *values, uint16_t capacity) |
int | rte_metrics_update_value (int port_id, uint16_t key, const uint64_t value) |
int | rte_metrics_update_values (int port_id, uint16_t key, const uint64_t *values, uint32_t count) |
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.
Definition in file rte_metrics.h.
#define RTE_METRICS_MAX_NAME_LEN 64 |
Maximum length of metric name (including null-terminator)
Definition at line 35 of file rte_metrics.h.
#define RTE_METRICS_GLOBAL -1 |
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.
Definition at line 46 of file rte_metrics.h.
int rte_metrics_init | ( | int | socket_id | ) |
Initializes metric module. This function must be called from a primary process before metrics are used.
socket_id | Socket to use for shared memory allocation. |
int rte_metrics_deinit | ( | void | ) |
Deinitialize metric module. This function must be called from a primary process after all the metrics usage is over, to release the shared memory.
int rte_metrics_reg_name | ( | const char * | name | ) |
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.
name | Metric name. If this exceeds RTE_METRICS_MAX_NAME_LEN (including the NULL terminator), it is truncated. |
int rte_metrics_reg_names | ( | const char *const * | names, |
uint16_t | cnt_names | ||
) |
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.
names | List of metric names |
cnt_names | Number of metrics in set |
int rte_metrics_get_names | ( | struct rte_metric_name * | names, |
uint16_t | capacity | ||
) |
Get metric name-key lookup table.
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. |
capacity | Size (number of elements) of struct rte_metric_name array. Disregarded if names is NULL. |
int rte_metrics_get_values | ( | int | port_id, |
struct rte_metric_value * | values, | ||
uint16_t | capacity | ||
) |
Get metric value table.
port_id | Port id to query |
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. |
capacity | Size (number of elements) of struct rte_metric_value array. Disregarded if names is NULL. |
int rte_metrics_update_value | ( | int | port_id, |
uint16_t | key, | ||
const uint64_t | value | ||
) |
Updates a metric
port_id | Port to update metrics for |
key | Id of metric to update |
value | New value |
int rte_metrics_update_values | ( | int | port_id, |
uint16_t | key, | ||
const uint64_t * | values, | ||
uint32_t | count | ||
) |
Updates a metric set. Note that it is an error to try to update across a set boundary.
port_id | Port to update metrics for |
key | Base id of metrics set to update |
values | Set of new values |
count | Number of new values |