[dpdk-dev,RFC,v2,1/3] rte: change xstats to use integer keys
Commit Message
Signed-off-by: Remy Horton <remy.horton@intel.com>
---
lib/librte_ether/rte_ethdev.c | 100 ++++++++++++++++++++++++++++++++++++------
lib/librte_ether/rte_ethdev.h | 55 +++++++++++++++++++++++
2 files changed, 142 insertions(+), 13 deletions(-)
Comments
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Remy Horton
> Sent: Friday, May 06, 2016 7:11 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [RFC PATCH v2 1/3] rte: change xstats to use integer
> keys
>
> Signed-off-by: Remy Horton <remy.horton@intel.com>
> ---
> lib/librte_ether/rte_ethdev.c | 100 ++++++++++++++++++++++++++++++++++++-
> -----
> lib/librte_ether/rte_ethdev.h | 55 +++++++++++++++++++++++
> 2 files changed, 142 insertions(+), 13 deletions(-)
>
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index a31018e..29ba12c 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -112,7 +112,6 @@ static const struct rte_eth_xstats_name_off
> rte_txq_stats_strings[] = {
> #define RTE_NB_TXQ_STATS (sizeof(rte_txq_stats_strings) / \
> sizeof(rte_txq_stats_strings[0]))
>
> -
> /**
> * The user application callback description.
> *
> @@ -1507,6 +1506,87 @@ rte_eth_stats_reset(uint8_t port_id)
> dev->data->rx_mbuf_alloc_failed = 0;
> }
>
> +int
> +rte_eth_xstats_count(uint8_t port_id)
> +{
> + struct rte_eth_dev *dev;
> + int count;
> +
> + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
> + dev = &rte_eth_devices[port_id];
> + if (dev->dev_ops->xstats_names != NULL) {
> + count = (*dev->dev_ops->xstats_names)(dev, NULL, 0);
> + if (count < 0)
> + return count;
> + } else
> + count = 0;
> + count += RTE_NB_STATS;
> + count += dev->data->nb_rx_queues * RTE_NB_RXQ_STATS;
> + count += dev->data->nb_tx_queues * RTE_NB_TXQ_STATS;
> + return count;
> +}
> +
> +int
> +rte_eth_xstats_names(uint8_t port_id, struct rte_eth_xstats_name
> *ptr_names,
> + unsigned limit)
> +{
> + struct rte_eth_dev *dev;
> + int cnt_used_entries;
> + int cnt_expected_entries;
> + uint32_t idx, id_queue;
> +
> + if (ptr_names == NULL)
> + return -EINVAL;
> + cnt_expected_entries = rte_eth_xstats_count(port_id);
> + if (cnt_expected_entries < 0)
> + return cnt_expected_entries;
> + if ((int)limit < cnt_expected_entries)
> + return -ERANGE;
> +
> + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
> + dev = &rte_eth_devices[port_id];
> + if (dev->dev_ops->xstats_names != NULL) {
> + cnt_used_entries = (*dev->dev_ops->xstats_names)(
> + dev, ptr_names, limit);
> + if (cnt_used_entries < 0)
> + return cnt_used_entries;
> + } else
> + /* Driver itself does not support extended stats, but
> + * still have basic stats.
> + */
> + cnt_used_entries = 0;
> +
> + for (idx = 0; idx < RTE_NB_STATS; idx++) {
> + ptr_names[cnt_used_entries].id = cnt_used_entries;
> + snprintf(ptr_names[cnt_used_entries].name,
> + sizeof(ptr_names[0].name),
> + "%s", rte_stats_strings[idx].name);
> + cnt_used_entries++;
> + }
> + for (id_queue = 0; id_queue < dev->data->nb_rx_queues; id_queue++) {
> + for (idx = 0; idx < RTE_NB_RXQ_STATS; idx++) {
> + ptr_names[cnt_used_entries].id = cnt_used_entries;
> + snprintf(ptr_names[cnt_used_entries].name,
> + sizeof(ptr_names[0].name),
> + "rx_q%u%s",
> + id_queue, rte_rxq_stats_strings[idx].name);
> + cnt_used_entries++;
> + }
> +
> + }
> + for (id_queue = 0; id_queue < dev->data->nb_tx_queues; id_queue++) {
> + for (idx = 0; idx < RTE_NB_TXQ_STATS; idx++) {
> + ptr_names[cnt_used_entries].id = cnt_used_entries;
> + snprintf(ptr_names[cnt_used_entries].name,
> + sizeof(ptr_names[0].name),
> + "tx_q%u%s",
> + id_queue, rte_txq_stats_strings[idx].name);
> + cnt_used_entries++;
> + }
> + }
> + return cnt_used_entries;
> +}
> +
> /* retrieve ethdev extended statistics */ int
> rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats, @@ -
> 1551,8 +1631,8 @@ rte_eth_xstats_get(uint8_t port_id, struct
> rte_eth_xstats *xstats,
> stats_ptr = RTE_PTR_ADD(ð_stats,
> rte_stats_strings[i].offset);
> val = *stats_ptr;
> - snprintf(xstats[count].name, sizeof(xstats[count].name),
> - "%s", rte_stats_strings[i].name);
> + xstats[count].name[0] = '\0';
> + xstats[count].id = count + xcount;
> xstats[count++].value = val;
> }
>
> @@ -1563,9 +1643,8 @@ rte_eth_xstats_get(uint8_t port_id, struct
> rte_eth_xstats *xstats,
> rte_rxq_stats_strings[i].offset +
> q * sizeof(uint64_t));
> val = *stats_ptr;
> - snprintf(xstats[count].name, sizeof(xstats[count].name),
> - "rx_q%u_%s", q,
> - rte_rxq_stats_strings[i].name);
> + xstats[count].name[0] = '\0';
> + xstats[count].id = count + xcount;
> xstats[count++].value = val;
> }
> }
> @@ -1577,9 +1656,8 @@ rte_eth_xstats_get(uint8_t port_id, struct
> rte_eth_xstats *xstats,
> rte_txq_stats_strings[i].offset +
> q * sizeof(uint64_t));
> val = *stats_ptr;
> - snprintf(xstats[count].name, sizeof(xstats[count].name),
> - "tx_q%u_%s", q,
> - rte_txq_stats_strings[i].name);
> + xstats[count].name[0] = '\0';
> + xstats[count].id = count + xcount;
> xstats[count++].value = val;
> }
> }
> @@ -1621,7 +1699,6 @@ set_queue_stats_mapping(uint8_t port_id, uint16_t
> queue_id, uint8_t stat_idx,
> (dev, queue_id, stat_idx, is_rx);
> }
>
> -
Not sure how the community feels about white-space only changes.
Just mentioning in case some folks get excited about it. One here and a few below.
> int
> rte_eth_dev_set_tx_queue_stats_mapping(uint8_t port_id, uint16_t
> tx_queue_id,
> uint8_t stat_idx)
> @@ -1630,7 +1707,6 @@ rte_eth_dev_set_tx_queue_stats_mapping(uint8_t
> port_id, uint16_t tx_queue_id,
> STAT_QMAP_TX);
> }
>
> -
> int
> rte_eth_dev_set_rx_queue_stats_mapping(uint8_t port_id, uint16_t
> rx_queue_id,
> uint8_t stat_idx)
> @@ -1639,7 +1715,6 @@ rte_eth_dev_set_rx_queue_stats_mapping(uint8_t
> port_id, uint16_t rx_queue_id,
> STAT_QMAP_RX);
> }
>
> -
> void
> rte_eth_dev_info_get(uint8_t port_id, struct rte_eth_dev_info *dev_info)
> { @@ -1699,7 +1774,6 @@ rte_eth_macaddr_get(uint8_t port_id, struct
> ether_addr *mac_addr)
> ether_addr_copy(&dev->data->mac_addrs[0], mac_addr); }
>
> -
> int
> rte_eth_dev_get_mtu(uint8_t port_id, uint16_t *mtu) { diff --git
> a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h index
> 022733e..eaeb703 100644
> --- a/lib/librte_ether/rte_ethdev.h
> +++ b/lib/librte_ether/rte_ethdev.h
> @@ -941,10 +941,23 @@ struct rte_eth_txq_info {
> * structure.
> */
> struct rte_eth_xstats {
> + /* FIXME: Remove name[] once remaining drivers converted */
> char name[RTE_ETH_XSTATS_NAME_SIZE];
> + uint64_t id;
> uint64_t value;
> };
>
> +/**
> + * A name-key lookup element for extended statistics.
> + *
> + * This structure is used to map between names and ID numbers
> + * for extended ethernet statistics.
> + */
> +struct rte_eth_xstats_name {
> + char name[RTE_ETH_XSTATS_NAME_SIZE];
> + uint64_t id;
> +};
> +
> #define ETH_DCB_NUM_TCS 8
> #define ETH_MAX_VMDQ_POOL 64
>
> @@ -1080,6 +1093,13 @@ typedef int (*eth_xstats_get_t)(struct rte_eth_dev
> *dev, typedef void (*eth_xstats_reset_t)(struct rte_eth_dev *dev); /**<
> @internal Reset extended stats of an Ethernet device. */
>
> +typedef int (*eth_xstats_names_t)(struct rte_eth_dev *dev,
> + struct rte_eth_xstats_name *ptr_names, unsigned limit); /**<
> @internal
> +Get names of extended stats of an Ethernet device. */
> +
> +typedef int (*eth_xstats_count_t)(struct rte_eth_dev *dev); /**<
> +@internal Get count of extended stats of an Ethernet device. */
> +
> typedef int (*eth_queue_stats_mapping_set_t)(struct rte_eth_dev *dev,
> uint16_t queue_id,
> uint8_t stat_idx,
> @@ -1427,6 +1447,10 @@ struct eth_dev_ops {
> eth_stats_reset_t stats_reset; /**< Reset generic device
> statistics. */
> eth_xstats_get_t xstats_get; /**< Get extended device
> statistics. */
> eth_xstats_reset_t xstats_reset; /**< Reset extended device
> statistics. */
> + eth_xstats_names_t xstats_names;
> + /**< Get names of extended statistics. */
> + eth_xstats_count_t xstats_count;
> + /**< Get number of extended statistics. */
> eth_queue_stats_mapping_set_t queue_stats_mapping_set;
> /**< Configure per queue stat counter mapping. */
> eth_dev_infos_get_t dev_infos_get; /**< Get device info. */
> @@ -2279,6 +2303,37 @@ int rte_eth_stats_get(uint8_t port_id, struct
> rte_eth_stats *stats); void rte_eth_stats_reset(uint8_t port_id);
>
> /**
> + * Retrieve names of extended statistics of an Ethernet device.
> + *
> + * Names within ptr_strings will be aligned to RTE_ETH_XSTATS_NAME_SIZE
> +and
> + * will be listed in ascending mapping order.
> + *
> + * @param port_id
> + * The port identifier of the Ethernet device.
> + * @param ptr_names
> + * Block of memory to insert names into. Must be at least limit in size.
> + * @param limit
> + * Capacity of ptr_strings (number of names).
> + * @return
> + * If successful, number of statistics; negative on error.
> + */
> +int rte_eth_xstats_names(uint8_t port_id, struct rte_eth_xstats_name
> *ptr_names,
> + unsigned limit);
> +
> +/**
> + * Retrieve number of extended statistics of an Ethernet device.
> + *
> + * Names within ptr_strings will be aligned to RTE_ETH_XSTATS_NAME_SIZE
> +and
> + * will be listed in ascending mapping order.
> + *
> + * @param port_id
> + * The port identifier of the Ethernet device.
> + * @return
> + * If successful, number of statistics; negative on error.
> + */
> +int rte_eth_xstats_count(uint8_t port_id);
> +
> +/**
> * Retrieve extended statistics of an Ethernet device.
> *
> * @param port_id
> --
> 2.5.5
Acked-by: David Harton <dharton@cisco.com>
On 09/05/2016 14:59, David Harton (dharton) wrote:
[..]
>> }
>>
>> -
>
> Not sure how the community feels about white-space only changes.
> Just mentioning in case some folks get excited about it. One here and a few below.
I doubt it'll be showstopper. In any case hoping to get a v3 out that
converts the 4 other drivers that have xstats.
..Remy
2016-05-09 13:59, David Harton:
> > }
> >
> > -
>
> Not sure how the community feels about white-space only changes.
> Just mentioning in case some folks get excited about it. One here and a few below.
It's a trivial cleanup. No problem I think.
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Remy Horton
> Sent: Friday, May 6, 2016 12:11 PM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [RFC PATCH v2 1/3] rte: change xstats to use integer
> keys
>
> Signed-off-by: Remy Horton <remy.horton@intel.com>
> ---
Acked-by: Maryam Tahhan <maryam.tahhan@intel.com>
<snip>
> uint8_t stat_idx,
> @@ -1427,6 +1447,10 @@ struct eth_dev_ops {
> eth_stats_reset_t stats_reset; /**< Reset generic device
> statistics. */
> eth_xstats_get_t xstats_get; /**< Get extended device
> statistics. */
> eth_xstats_reset_t xstats_reset; /**< Reset extended
> device statistics. */
> + eth_xstats_names_t xstats_names;
> + /**< Get names of extended statistics. */
> + eth_xstats_count_t xstats_count;
> + /**< Get number of extended statistics. */
Hi Remy
While reviewing the second patch in this patchset I noticed you aren't actually using
eth_xstats_count_t xstats_count in the eth_dev_ops to retrieve the count in the driver.
Do you still need xstats_count?
BR
Maryam
<snip>
On 18/05/2016 09:31, Tahhan, Maryam wrote:
[..]
>> + eth_xstats_count_t xstats_count;
>> + /**< Get number of extended statistics. */
>
> Hi Remy
> While reviewing the second patch in this patchset I noticed you aren't actually using
> eth_xstats_count_t xstats_count in the eth_dev_ops to retrieve the count in the driver.
> Do you still need xstats_count?
Well spotted - bit of dead code that slipped through the net when I
decided to use the existing convention for the driver-side interface.
Currently working on a v3 that will convert all the drivers, so will fix
in that patchset.
..Remy
@@ -112,7 +112,6 @@ static const struct rte_eth_xstats_name_off rte_txq_stats_strings[] = {
#define RTE_NB_TXQ_STATS (sizeof(rte_txq_stats_strings) / \
sizeof(rte_txq_stats_strings[0]))
-
/**
* The user application callback description.
*
@@ -1507,6 +1506,87 @@ rte_eth_stats_reset(uint8_t port_id)
dev->data->rx_mbuf_alloc_failed = 0;
}
+int
+rte_eth_xstats_count(uint8_t port_id)
+{
+ struct rte_eth_dev *dev;
+ int count;
+
+ RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
+ dev = &rte_eth_devices[port_id];
+ if (dev->dev_ops->xstats_names != NULL) {
+ count = (*dev->dev_ops->xstats_names)(dev, NULL, 0);
+ if (count < 0)
+ return count;
+ } else
+ count = 0;
+ count += RTE_NB_STATS;
+ count += dev->data->nb_rx_queues * RTE_NB_RXQ_STATS;
+ count += dev->data->nb_tx_queues * RTE_NB_TXQ_STATS;
+ return count;
+}
+
+int
+rte_eth_xstats_names(uint8_t port_id, struct rte_eth_xstats_name *ptr_names,
+ unsigned limit)
+{
+ struct rte_eth_dev *dev;
+ int cnt_used_entries;
+ int cnt_expected_entries;
+ uint32_t idx, id_queue;
+
+ if (ptr_names == NULL)
+ return -EINVAL;
+ cnt_expected_entries = rte_eth_xstats_count(port_id);
+ if (cnt_expected_entries < 0)
+ return cnt_expected_entries;
+ if ((int)limit < cnt_expected_entries)
+ return -ERANGE;
+
+ RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
+ dev = &rte_eth_devices[port_id];
+ if (dev->dev_ops->xstats_names != NULL) {
+ cnt_used_entries = (*dev->dev_ops->xstats_names)(
+ dev, ptr_names, limit);
+ if (cnt_used_entries < 0)
+ return cnt_used_entries;
+ } else
+ /* Driver itself does not support extended stats, but
+ * still have basic stats.
+ */
+ cnt_used_entries = 0;
+
+ for (idx = 0; idx < RTE_NB_STATS; idx++) {
+ ptr_names[cnt_used_entries].id = cnt_used_entries;
+ snprintf(ptr_names[cnt_used_entries].name,
+ sizeof(ptr_names[0].name),
+ "%s", rte_stats_strings[idx].name);
+ cnt_used_entries++;
+ }
+ for (id_queue = 0; id_queue < dev->data->nb_rx_queues; id_queue++) {
+ for (idx = 0; idx < RTE_NB_RXQ_STATS; idx++) {
+ ptr_names[cnt_used_entries].id = cnt_used_entries;
+ snprintf(ptr_names[cnt_used_entries].name,
+ sizeof(ptr_names[0].name),
+ "rx_q%u%s",
+ id_queue, rte_rxq_stats_strings[idx].name);
+ cnt_used_entries++;
+ }
+
+ }
+ for (id_queue = 0; id_queue < dev->data->nb_tx_queues; id_queue++) {
+ for (idx = 0; idx < RTE_NB_TXQ_STATS; idx++) {
+ ptr_names[cnt_used_entries].id = cnt_used_entries;
+ snprintf(ptr_names[cnt_used_entries].name,
+ sizeof(ptr_names[0].name),
+ "tx_q%u%s",
+ id_queue, rte_txq_stats_strings[idx].name);
+ cnt_used_entries++;
+ }
+ }
+ return cnt_used_entries;
+}
+
/* retrieve ethdev extended statistics */
int
rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
@@ -1551,8 +1631,8 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
stats_ptr = RTE_PTR_ADD(ð_stats,
rte_stats_strings[i].offset);
val = *stats_ptr;
- snprintf(xstats[count].name, sizeof(xstats[count].name),
- "%s", rte_stats_strings[i].name);
+ xstats[count].name[0] = '\0';
+ xstats[count].id = count + xcount;
xstats[count++].value = val;
}
@@ -1563,9 +1643,8 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
rte_rxq_stats_strings[i].offset +
q * sizeof(uint64_t));
val = *stats_ptr;
- snprintf(xstats[count].name, sizeof(xstats[count].name),
- "rx_q%u_%s", q,
- rte_rxq_stats_strings[i].name);
+ xstats[count].name[0] = '\0';
+ xstats[count].id = count + xcount;
xstats[count++].value = val;
}
}
@@ -1577,9 +1656,8 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
rte_txq_stats_strings[i].offset +
q * sizeof(uint64_t));
val = *stats_ptr;
- snprintf(xstats[count].name, sizeof(xstats[count].name),
- "tx_q%u_%s", q,
- rte_txq_stats_strings[i].name);
+ xstats[count].name[0] = '\0';
+ xstats[count].id = count + xcount;
xstats[count++].value = val;
}
}
@@ -1621,7 +1699,6 @@ set_queue_stats_mapping(uint8_t port_id, uint16_t queue_id, uint8_t stat_idx,
(dev, queue_id, stat_idx, is_rx);
}
-
int
rte_eth_dev_set_tx_queue_stats_mapping(uint8_t port_id, uint16_t tx_queue_id,
uint8_t stat_idx)
@@ -1630,7 +1707,6 @@ rte_eth_dev_set_tx_queue_stats_mapping(uint8_t port_id, uint16_t tx_queue_id,
STAT_QMAP_TX);
}
-
int
rte_eth_dev_set_rx_queue_stats_mapping(uint8_t port_id, uint16_t rx_queue_id,
uint8_t stat_idx)
@@ -1639,7 +1715,6 @@ rte_eth_dev_set_rx_queue_stats_mapping(uint8_t port_id, uint16_t rx_queue_id,
STAT_QMAP_RX);
}
-
void
rte_eth_dev_info_get(uint8_t port_id, struct rte_eth_dev_info *dev_info)
{
@@ -1699,7 +1774,6 @@ rte_eth_macaddr_get(uint8_t port_id, struct ether_addr *mac_addr)
ether_addr_copy(&dev->data->mac_addrs[0], mac_addr);
}
-
int
rte_eth_dev_get_mtu(uint8_t port_id, uint16_t *mtu)
{
@@ -941,10 +941,23 @@ struct rte_eth_txq_info {
* structure.
*/
struct rte_eth_xstats {
+ /* FIXME: Remove name[] once remaining drivers converted */
char name[RTE_ETH_XSTATS_NAME_SIZE];
+ uint64_t id;
uint64_t value;
};
+/**
+ * A name-key lookup element for extended statistics.
+ *
+ * This structure is used to map between names and ID numbers
+ * for extended ethernet statistics.
+ */
+struct rte_eth_xstats_name {
+ char name[RTE_ETH_XSTATS_NAME_SIZE];
+ uint64_t id;
+};
+
#define ETH_DCB_NUM_TCS 8
#define ETH_MAX_VMDQ_POOL 64
@@ -1080,6 +1093,13 @@ typedef int (*eth_xstats_get_t)(struct rte_eth_dev *dev,
typedef void (*eth_xstats_reset_t)(struct rte_eth_dev *dev);
/**< @internal Reset extended stats of an Ethernet device. */
+typedef int (*eth_xstats_names_t)(struct rte_eth_dev *dev,
+ struct rte_eth_xstats_name *ptr_names, unsigned limit);
+/**< @internal Get names of extended stats of an Ethernet device. */
+
+typedef int (*eth_xstats_count_t)(struct rte_eth_dev *dev);
+/**< @internal Get count of extended stats of an Ethernet device. */
+
typedef int (*eth_queue_stats_mapping_set_t)(struct rte_eth_dev *dev,
uint16_t queue_id,
uint8_t stat_idx,
@@ -1427,6 +1447,10 @@ struct eth_dev_ops {
eth_stats_reset_t stats_reset; /**< Reset generic device statistics. */
eth_xstats_get_t xstats_get; /**< Get extended device statistics. */
eth_xstats_reset_t xstats_reset; /**< Reset extended device statistics. */
+ eth_xstats_names_t xstats_names;
+ /**< Get names of extended statistics. */
+ eth_xstats_count_t xstats_count;
+ /**< Get number of extended statistics. */
eth_queue_stats_mapping_set_t queue_stats_mapping_set;
/**< Configure per queue stat counter mapping. */
eth_dev_infos_get_t dev_infos_get; /**< Get device info. */
@@ -2279,6 +2303,37 @@ int rte_eth_stats_get(uint8_t port_id, struct rte_eth_stats *stats);
void rte_eth_stats_reset(uint8_t port_id);
/**
+ * Retrieve names of extended statistics of an Ethernet device.
+ *
+ * Names within ptr_strings will be aligned to RTE_ETH_XSTATS_NAME_SIZE and
+ * will be listed in ascending mapping order.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @param ptr_names
+ * Block of memory to insert names into. Must be at least limit in size.
+ * @param limit
+ * Capacity of ptr_strings (number of names).
+ * @return
+ * If successful, number of statistics; negative on error.
+ */
+int rte_eth_xstats_names(uint8_t port_id, struct rte_eth_xstats_name *ptr_names,
+ unsigned limit);
+
+/**
+ * Retrieve number of extended statistics of an Ethernet device.
+ *
+ * Names within ptr_strings will be aligned to RTE_ETH_XSTATS_NAME_SIZE and
+ * will be listed in ascending mapping order.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @return
+ * If successful, number of statistics; negative on error.
+ */
+int rte_eth_xstats_count(uint8_t port_id);
+
+/**
* Retrieve extended statistics of an Ethernet device.
*
* @param port_id