[dpdk-dev] [PATCH] net/mlx5: support extended statistics
Thomas Monjalon
thomas.monjalon at 6wind.com
Mon Jan 16 15:38:46 CET 2017
Hi Shahaf,
I am not specifically interested in this thread, but if I was,
it is not sure I would make the effort to try to understand your
message (starting with a signature, an useless original header, and
some long useless listings).
I won't try to find which special sign you use to mark your reply.
We read a lot of mails in this mailing list so we must comply to
some standard efficient formatting:
- remove the useless lines
- quote original lines with one more "> "
- reply below the regarding section
Maybe you need to tune or change your mail software, I'm sorry
but it is worth to do it.
Note: some other contributors have currently the same issue as you.
Note 2: I said nothing about Outlook ;)
---- for reference, below ----
2017-01-16 13:32, Shahaf Shuler:
>
> --Shahaf
>
> -----Original Message-----
> From: Hanoch Haim (hhaim) [mailto:hhaim at cisco.com]
> Sent: Thursday, January 12, 2017 11:57 AM
> To: Adrien Mazarguil <adrien.mazarguil at 6wind.com>; Shahaf Shuler <shahafs at mellanox.com>
> Cc: dev at dpdk.org; Elad Persiko <eladpe at mellanox.com>
> Subject: RE: [PATCH] net/mlx5: support extended statistics
>
> Hi Shahaf,
>
> 1) I would add *all* the hw counters to PF
>
> $ethtool -S enp135s0f0
> NIC statistics:
> rx_packets: 54
> rx_bytes: 3240
> tx_packets: 138
> tx_bytes: 8280
> tx_tso_packets: 0
> tx_tso_bytes: 0
> tx_tso_inner_packets: 0
> tx_tso_inner_bytes: 0
> rx_lro_packets: 0
> rx_lro_bytes: 0
> rx_csum_unnecessary: 0
> rx_csum_none: 54
> rx_csum_complete: 0
> rx_csum_unnecessary_inner: 0
> tx_csum_partial: 0
> tx_csum_partial_inner: 0
> tx_csum_none: 138
> tx_queue_stopped: 0
> tx_queue_wake: 0
> tx_queue_dropped: 0
> rx_sw_lro_aggregated: 0
> rx_sw_lro_flushed: 0
> rx_sw_lro_no_desc: 0
> rx_wqe_err: 0
> rx_cqe_compress_pkts: 0
> rx_cqe_compress_blks: 0
> rx_mpwqe_filler: 0
> rx_mpwqe_frag: 0
> link_down_events_phy: 0
> rx_out_of_buffer: 0
> rx_vport_unicast_packets: 26126070627
> rx_vport_unicast_bytes: 1328543705864986
> tx_vport_unicast_packets: 687072959078
> tx_vport_unicast_bytes: 3339188884659844
> rx_vport_multicast_packets: 0
> rx_vport_multicast_bytes: 0
> tx_vport_multicast_packets: 0
> tx_vport_multicast_bytes: 0
> rx_vport_broadcast_packets: 4543553
> rx_vport_broadcast_bytes: 272614872
> tx_vport_broadcast_packets: 4543637
> tx_vport_broadcast_bytes: 272619912
> rx_vport_rdma_unicast_packets: 430134
> rx_vport_rdma_unicast_bytes: 32690184
> tx_vport_rdma_unicast_packets: 0
> tx_vport_rdma_unicast_bytes: 0
> rx_vport_rdma_multicast_packets: 0
> rx_vport_rdma_multicast_bytes: 0
> tx_vport_rdma_multicast_packets: 0
> tx_vport_rdma_multicast_bytes: 0
> tx_packets_phy: 11756775169850
> rx_packets_phy: 2246825269635
> rx_crc_errors_phy: 0
> tx_bytes_phy: 3404211507236837
> rx_bytes_phy: 1342896754459327
> tx_multicast_phy: 0
> tx_broadcast_phy: 4552688
> rx_multicast_phy: 0
> rx_broadcast_phy: 4552604
> rx_in_range_len_errors_phy: 0
> rx_out_of_range_len_phy: 0
> rx_oversize_pkts_phy: 1135778701
> rx_symbol_err_phy: 0
> tx_mac_control_phy: 16579953
> rx_mac_control_phy: 16670966
> rx_unsupported_op_phy: 0
> rx_pause_ctrl_phy: 16670966
> tx_pause_ctrl_phy: 16579953
> rx_discards_phy: 12244164648
> tx_discards_phy: 0
> tx_errors_phy: 0
> rx_undersize_pkts_phy: 0
> rx_fragments_phy: 0
> rx_jabbers_phy: 0
> rx_64_bytes_phy: 911948813404
> rx_65_to_127_bytes_phy: 335422614022
> rx_128_to_255_bytes_phy: 153383903056
> rx_256_to_511_bytes_phy: 80464779917
> rx_512_to_1023_bytes_phy: 184356224678
> rx_1024_to_1518_bytes_phy: 313733619509
> rx_1519_to_2047_bytes_phy: 235669614881
> rx_2048_to_4095_bytes_phy: 4051420173
> rx_4096_to_8191_bytes_phy: 1011852034
> rx_8192_to_10239_bytes_phy: 27710327250
> time_since_last_clear_phy: 2998621833
> symbol_errors_phy: 0
> sync_headers_errors_phy: 0
> edpl/bip_errors_lane0_phy: 0
> edpl/bip_errors_lane1_phy: 0
> edpl/bip_errors_lane2_phy: 0
> edpl/bip_errors_lane3_phy: 0
> fc_corrected_blocks_lane0_phy: 0
> fc_corrected_blocks_lane1_phy: 0
> fc_corrected_blocks_lane2_phy: 0
> fc_corrected_blocks_lane3_phy: 0
> fc_uncorrectable_lane0_phy: 0
> fc_uncorrectable_lane1_phy: 0
> fc_uncorrectable_lane2_phy: 0
> fc_uncorrectable_lane3_phy: 0
> rs_corrected_blocks_phy: 0
> rs_uncorrectable_blocks_phy: 0
> rs_no_errors_blocks_phy: 58566832662545
> rs_single_error_blocks_phy: 0
> rs_corrected_symbols_total_phy: 0
> rs_corrected_symbols_lane0_phy: 0
> rs_corrected_symbols_lane1_phy: 0
> rs_corrected_symbols_lane2_phy: 0
> rs_corrected_symbols_lane3_phy: 0
> rx_prio0_bytes: 1342896754459327
> rx_prio0_packets: 2234564434021
> tx_prio0_bytes: 3404210446119845
> tx_prio0_packets: 11756758589897
> rx_prio1_bytes: 0
> rx_prio1_packets: 0
> tx_prio1_bytes: 0
> tx_prio1_packets: 0
> rx_prio2_bytes: 0
> rx_prio2_packets: 0
> tx_prio2_bytes: 0
> tx_prio2_packets: 0
> rx_prio3_bytes: 0
> rx_prio3_packets: 0
> tx_prio3_bytes: 0
> tx_prio3_packets: 0
> rx_prio4_bytes: 0
> rx_prio4_packets: 0
> tx_prio4_bytes: 0
> tx_prio4_packets: 0
> rx_prio5_bytes: 0
> rx_prio5_packets: 0
> tx_prio5_bytes: 0
> tx_prio5_packets: 0
> rx_prio6_bytes: 0
> rx_prio6_packets: 0
> tx_prio6_bytes: 0
> tx_prio6_packets: 0
> rx_prio7_bytes: 0
> rx_prio7_packets: 0
> tx_prio7_bytes: 0
> tx_prio7_packets: 0
> rx0_packets: 54
> rx0_bytes: 3240
> rx0_csum_complete
> [Shahaf Shuler] we will consider to insert new counters on future patches
>
> 2) Add the right HW counters to the VF
>
> tx28_nop: 0
> tx28_queue_stopped: 0
> tx28_queue_wake: 0
> tx28_queue_dropped: 0
> tx29_packets: 0
> tx29_bytes: 0
> tx29_tso_packets: 0
> tx29_tso_bytes: 0
> tx29_tso_inner_packets: 0
> tx29_tso_inner_bytes: 0
> tx29_csum_none: 0
> tx29_csum_partial: 0
> tx29_csum_partial_inner: 0
> tx29_nop: 0
> tx29_queue_stopped: 0
> [Shahaf Shuler] the counters are valid for both VF/PF
>
> 3) Implement the stats_get/reset using HW counters
>
> .stats_get = mlx5_stats_get,
> .stats_reset = mlx5_stats_reset,
> [Shahaf Shuler] it will be supported by future commits.
>
>
> Thanks,
> Hanoh
>
>
> -----Original Message-----
> From: Adrien Mazarguil [mailto:adrien.mazarguil at 6wind.com]
> Sent: Wednesday, January 11, 2017 6:55 PM
> To: Shahaf Shuler
> Cc: dev at dpdk.org; Elad Persiko; Hanoch Haim (hhaim)
> Subject: Re: [PATCH] net/mlx5: support extended statistics
>
> Hi Shahaf,
>
> Thanks, I have a few comments, most of them relatively minor. Please see below.
>
> On Wed, Jan 11, 2017 at 10:55:42AM +0200, Shahaf Shuler wrote:
> > Implement xstats_*() DPDK callbacks
> >
> > Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
> > Signed-off-by: Elad Persiko <eladpe at mellanox.com>
> > Signed-off-by: Hanoch Haim <hhaim at cisco.com>
> > ---
> > drivers/net/mlx5/mlx5.c | 3 +
> > drivers/net/mlx5/mlx5.h | 12 ++
> > drivers/net/mlx5/mlx5_defs.h | 3 +
> > drivers/net/mlx5/mlx5_stats.c | 342 ++++++++++++++++++++++++++++++++++++++++
> > drivers/net/mlx5/mlx5_trigger.c | 1 +
> > 5 files changed, 361 insertions(+)
> >
> > diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index
> > 6293c1f..3359d3c 100644
> > --- a/drivers/net/mlx5/mlx5.c
> > +++ b/drivers/net/mlx5/mlx5.c
> > @@ -199,6 +199,9 @@
> > .link_update = mlx5_link_update,
> > .stats_get = mlx5_stats_get,
> > .stats_reset = mlx5_stats_reset,
> > + .xstats_get = mlx5_xstats_get,
> > + .xstats_reset = mlx5_xstats_reset,
> > + .xstats_get_names = mlx5_xstats_get_names,
> > .dev_infos_get = mlx5_dev_infos_get,
> > .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get,
> > .vlan_filter_set = mlx5_vlan_filter_set, diff --git
> > a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index
> > ee62e04..034a05e 100644
> > --- a/drivers/net/mlx5/mlx5.h
> > +++ b/drivers/net/mlx5/mlx5.h
> > @@ -89,6 +89,11 @@ enum {
> > PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF = 0x101a, };
> >
> > +struct mlx5_xstats_ctrl {
> > + uint64_t shadow[MLX5_MAX_XSTATS];
> > + uint16_t stats_n; /* Number of device stats. */ };
> > +
> > struct priv {
> > struct rte_eth_dev *dev; /* Ethernet device. */
> > struct ibv_context *ctx; /* Verbs context. */ @@ -142,6 +147,7 @@
> > struct priv {
> > struct fdir_queue *fdir_drop_queue; /* Flow director drop queue. */
> > LIST_HEAD(mlx5_flows, rte_flow) flows; /* RTE Flow rules. */
> > uint32_t link_speed_capa; /* Link speed capabilities. */
> > + struct mlx5_xstats_ctrl xstats_ctrl; /* Extended stats control. */
> > rte_spinlock_t lock; /* Lock for control functions. */ };
> >
> > @@ -250,8 +256,14 @@ int mlx5_dev_rss_reta_update(struct rte_eth_dev
> > *,
> >
> > /* mlx5_stats.c */
> >
> > +void priv_xstats_init(struct priv *);
> > void mlx5_stats_get(struct rte_eth_dev *, struct rte_eth_stats *);
> > void mlx5_stats_reset(struct rte_eth_dev *);
> > +int mlx5_xstats_get(struct rte_eth_dev *,
> > + struct rte_eth_xstat *, unsigned int); void
> > +mlx5_xstats_reset(struct rte_eth_dev *); int
> > +mlx5_xstats_get_names(struct rte_eth_dev *,
> > + struct rte_eth_xstat_name *, unsigned int);
> >
> > /* mlx5_vlan.c */
> >
> > diff --git a/drivers/net/mlx5/mlx5_defs.h
> > b/drivers/net/mlx5/mlx5_defs.h index b32816e..beabb70 100644
> > --- a/drivers/net/mlx5/mlx5_defs.h
> > +++ b/drivers/net/mlx5/mlx5_defs.h
> > @@ -79,4 +79,7 @@
> > /* Alarm timeout. */
> > #define MLX5_ALARM_TIMEOUT_US 100000
> >
> > +/* Maximum number of extended statistics counters. */ #define
> > +MLX5_MAX_XSTATS 32
> > +
> > #endif /* RTE_PMD_MLX5_DEFS_H_ */
> > diff --git a/drivers/net/mlx5/mlx5_stats.c
> > b/drivers/net/mlx5/mlx5_stats.c index f2b5781..08a7656 100644
> > --- a/drivers/net/mlx5/mlx5_stats.c
> > +++ b/drivers/net/mlx5/mlx5_stats.c
> > @@ -31,11 +31,16 @@
> > * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> > */
> >
> > +#include <linux/sockios.h>
> > +#include <linux/ethtool.h>
> > +
> > /* DPDK headers don't like -pedantic. */ #ifdef PEDANTIC #pragma
> > GCC diagnostic ignored "-Wpedantic"
> > #endif
> > #include <rte_ethdev.h>
> > +#include <rte_common.h>
> > +#include <rte_malloc.h>
> > #ifdef PEDANTIC
> > #pragma GCC diagnostic error "-Wpedantic"
> > #endif
> > @@ -44,6 +49,269 @@
> > #include "mlx5_rxtx.h"
> > #include "mlx5_defs.h"
> >
> > +struct mlx5_counter_ctrl {
> > + /* Name of the counter for dpdk user. */
>
> "for dpdk user" is redundant given the purpose of this API.
>
> > + char dpdk_name[RTE_ETH_XSTATS_NAME_SIZE];
> > + /* Name of the counter on the device table. */
> > + char ctr_name[RTE_ETH_XSTATS_NAME_SIZE];
> > + /* Index in the device counters table. */
> > + uint16_t dev_table_idx;
> > +};
> > +
> > +static struct mlx5_counter_ctrl mlx5_counters_init[] = {
> > + {
> > + .dpdk_name = "rx_port_unicast_bytes",
> > + .ctr_name = "rx_vport_unicast_bytes",
> > + .dev_table_idx = 0
>
> Please add comma after ".dev_table_idx = 0" (same comment applies to the following definitions). Note you may leave it out entirely since unspecified fields are automatically initialized to zero.
>
> > + },
> > + {
> > + .dpdk_name = "rx_port_multicast_bytes",
> > + .ctr_name = "rx_vport_multicast_bytes",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_port_broadcast_bytes",
> > + .ctr_name = "rx_vport_broadcast_bytes",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_port_unicast_packets",
> > + .ctr_name = "rx_vport_unicast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_port_multicast_packets",
> > + .ctr_name = "rx_vport_multicast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_port_broadcast_packets",
> > + .ctr_name = "rx_vport_broadcast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_unicast_bytes",
> > + .ctr_name = "tx_vport_unicast_bytes",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_multicast_bytes",
> > + .ctr_name = "tx_vport_multicast_bytes",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_broadcast_bytes",
> > + .ctr_name = "tx_vport_broadcast_bytes",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_unicast_packets",
> > + .ctr_name = "tx_vport_unicast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_multicast_packets",
> > + .ctr_name = "tx_vport_multicast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_port_broadcast_packets",
> > + .ctr_name = "tx_vport_broadcast_packets",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_wqe_err",
> > + .ctr_name = "rx_wqe_err",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_crc_errors_phy",
> > + .ctr_name = "rx_crc_errors_phy",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_in_range_len_errors_phy",
> > + .ctr_name = "rx_in_range_len_errors_phy",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "rx_symbol_err_phy",
> > + .ctr_name = "rx_symbol_err_phy",
> > + .dev_table_idx = 0
> > + },
> > + {
> > + .dpdk_name = "tx_errors_phy",
> > + .ctr_name = "tx_errors_phy",
> > + .dev_table_idx = 0
> > + },
> > +};
> > +
> > +const unsigned int xstats_n = RTE_DIM(mlx5_counters_init);
>
> Considering this global depends on mlx5_counters_init[] and is only used in this file, it should be static.
>
> > +
> > +/**
> > + * Read device counters table.
> > + *
> > + * @param priv
> > + * Pointer to private structure.
> > + * @param[out] stats
> > + * Counters table output buffer.
> > + *
> > + * @return
> > + * 0 on success and stats is filled, negative on error.
> > + */
> > +static int
> > +priv_read_dev_counters(struct priv *priv, uint64_t *stats) {
> > + struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
> > + unsigned int i;
> > + struct ifreq ifr;
> > + unsigned int stats_sz = (xstats_ctrl->stats_n * sizeof(uint64_t)) +
> > + sizeof(struct ethtool_stats);
> > + struct ethtool_stats et_stats[(stats_sz + (
> > + sizeof(struct ethtool_stats) - 1)) /
> > + sizeof(struct ethtool_stats)];
> > +
> > + et_stats->cmd = ETHTOOL_GSTATS;
> > + et_stats->n_stats = xstats_ctrl->stats_n;
> > + ifr.ifr_data = (caddr_t)et_stats;
> > + if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
> > + WARN("unable to get statistic values");
> > + return -1;
> > + }
> > + for (i = 0; (i != xstats_n) ; ++i)
> > + stats[i] = (uint64_t)
> > + et_stats->data[mlx5_counters_init[i].dev_table_idx];
> > + return 0;
> > +}
> > +
> > +/**
> > + * Init the strcutures to read device counters.
>
> Typo, "strcutures".
>
> > + *
> > + * @param priv
> > + * Pointer to private structure.
> > + */
> > +void
> > +priv_xstats_init(struct priv *priv)
> > +{
> > + struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
> > + unsigned int i;
> > + unsigned int j;
> > + char ifname[IF_NAMESIZE];
> > + struct ifreq ifr;
> > + struct ethtool_drvinfo drvinfo;
> > + struct ethtool_gstrings *strings = NULL;
> > + unsigned int dev_stats_n;
> > + unsigned int str_sz;
> > +
> > + if (priv_get_ifname(priv, &ifname)) {
> > + WARN("unable to get interface name");
> > + return;
> > + }
> > + /* How many statistics are available. */
> > + drvinfo.cmd = ETHTOOL_GDRVINFO;
> > + ifr.ifr_data = (caddr_t)&drvinfo;
> > + if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
> > + WARN("unable to get driver info");
> > + return;
> > + }
> > + dev_stats_n = drvinfo.n_stats;
> > + if (dev_stats_n < 1) {
> > + WARN("no extended statistics available");
> > + return;
> > + }
> > + xstats_ctrl->stats_n = dev_stats_n;
> > + /* Allocate memory to grab stat names and values. */
> > + str_sz = dev_stats_n * ETH_GSTRING_LEN;
> > + strings = (struct ethtool_gstrings *)
> > + rte_malloc("xstats_strings",
> > + str_sz + sizeof(struct ethtool_gstrings), 0);
> > + if (!strings) {
> > + WARN("unable to allocate memory for xstats");
> > + return;
> > + }
> > + strings->cmd = ETHTOOL_GSTRINGS;
> > + strings->string_set = ETH_SS_STATS;
> > + strings->len = dev_stats_n;
> > + ifr.ifr_data = (caddr_t)strings;
> > + if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
> > + WARN("unable to get statistic names");
> > + goto free;
> > + }
> > + for (j = 0; (j != xstats_n); ++j)
> > + mlx5_counters_init[j].dev_table_idx = dev_stats_n;
>
> As a global, mlx5_counters_init[] affects all DPDK ports that use the mlx5 PMD simultaneously. Are you sure calling priv_xstats_init() from
> mlx5_dev_start() is safe?
>
> I think this global should be const and initialized only once.
>
> > + for (i = 0; (i != dev_stats_n); ++i) {
> > + const char *curr_string = (const char *)
> > + &strings->data[i * ETH_GSTRING_LEN];
> > +
> > + for (j = 0; (j != xstats_n); ++j) {
> > + if (!strcmp(mlx5_counters_init[j].ctr_name,
> > + curr_string)) {
> > + mlx5_counters_init[j].dev_table_idx = i;
>
> The above comment also applies here. The PMD instance should allocate its own mapping as a priv field if there is no other choice. You could perhaps make it part of the mlx5_xstats_ctrl structure.
>
> > + break;
> > + }
> > + }
> > + }
> > + for (j = 0; (j != xstats_n); ++j) {
> > + if (mlx5_counters_init[j].dev_table_idx >= dev_stats_n) {
> > + WARN("Counters are not recognized");
>
> Displaying the name of the counter that is not recognized could help users determine what's doing on. Please make sure all info/warning/error messages are helpful enough, e.g.:
>
> testpmd> show port xstats 0
> ###### NIC extended statistics for port 0
> mlx5: Counters are not recognized
> testpmd> # what?
>
> > + goto free;
> > + }
> > + }
> > + /* Copy to shadow at first time. */
> > + assert(xstats_n <= MLX5_MAX_XSTATS);
> > + priv_read_dev_counters(priv, xstats_ctrl->shadow);
> > +free:
> > + rte_free(strings);
> > +}
> > +
> > +/**
> > + * Get device extended statistics.
> > + *
> > + * @param priv
> > + * Pointer to private structure.
> > + * @param[out] stats
> > + * Pointer to rte extended stats table.
> > + *
> > + * @return
> > + * Number of extended stats on success and stats is filled,
> > + * nagative on error.
>
> Typo, "nagative".
>
> > + */
> > +static int
> > +priv_xstats_get(struct priv *priv, struct rte_eth_xstat *stats) {
> > + struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
> > + unsigned int i;
> > + uint64_t counters[xstats_n];
> > +
> > + if (priv_read_dev_counters(priv, counters) < 0)
> > + return -1;
> > + for (i = 0; (i != xstats_n) ; ++i) {
> > + stats[i].id = i;
> > + stats[i].value = (uint64_t)
> > + (counters[i] - xstats_ctrl->shadow[i]);
>
> I understand the purpose of the shadow array in this context, however to me "shadow" implies some sort of caching is taking place. I think "init" or "base" (as the base value or something) would make its purpose clearer.
>
> > + }
> > + return xstats_n;
> > +}
> > +
> > +/**
> > + * Reset device extended statistics.
> > + *
> > + * @param priv
> > + * Pointer to private structure.
> > + */
> > +static void
> > +priv_xstats_reset(struct priv *priv)
> > +{
> > + struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
> > + unsigned int i;
> > + uint64_t counters[xstats_n];
> > +
> > + if (priv_read_dev_counters(priv, counters) < 0)
> > + return;
> > + for (i = 0; (i != xstats_n) ; ++i)
> > + xstats_ctrl->shadow[i] = counters[i]; }
> > +
> > /**
> > * DPDK callback to get device statistics.
> > *
> > @@ -142,3 +410,77 @@
> > #endif
> > priv_unlock(priv);
> > }
> > +
> > +/**
> > + * DPDK callback to get extended device statistics.
> > + *
> > + * @param dev
> > + * Pointer to Ethernet device structure.
> > + * @param[out] stats
> > + * Stats table output buffer.
> > + * @param n
> > + * The size of the stats table.
> > + *
> > + * @return
> > + * Number of xstats on success, negative on failure.
> > + */
> > +int
> > +mlx5_xstats_get(struct rte_eth_dev *dev,
> > + struct rte_eth_xstat *stats, unsigned int n) {
> > + struct priv *priv = mlx5_get_priv(dev);
> > + int ret = xstats_n;
> > +
> > + if (n >= xstats_n && stats) {
> > + priv_lock(priv);
> > + ret = priv_xstats_get(priv, stats);
> > + priv_unlock(priv);
> > + }
> > + return ret;
> > +}
> > +
> > +/**
> > + * DPDK callback to clear device extended statistics.
> > + *
> > + * @param dev
> > + * Pointer to Ethernet device structure.
> > + */
> > +void
> > +mlx5_xstats_reset(struct rte_eth_dev *dev) {
> > + struct priv *priv = mlx5_get_priv(dev);
> > +
> > + priv_lock(priv);
> > + priv_xstats_reset(priv);
> > + priv_unlock(priv);
> > +}
> > +
> > +/**
> > + * DPDK callback to retrieve names of extended device statistics
> > + *
> > + * @param dev
> > + * Pointer to Ethernet device structure.
> > + * @param[out] xstats_names
> > + * Block of memory to insert names into
>
> Let's call "block of memory" a "buffer"? There is also a missing period at the end of this sentence.
>
> > + * @param size
> > + * Number of names.
>
> "num" (or "n" as in the API) would make more sense than "size" here.
>
> > + *
> > + * @return
> > + * Number of xstats names.
> > + */
> > +int
> > +mlx5_xstats_get_names(struct rte_eth_dev *dev,
> > + struct rte_eth_xstat_name *xstats_names, unsigned int size) {
> > + struct priv *priv = mlx5_get_priv(dev);
> > + unsigned int i;
> > +
> > + if (size >= xstats_n && xstats_names) {
> > + priv_lock(priv);
> > + for (i = 0; (i != xstats_n) ; ++i)
> > + strcpy(xstats_names[i].name,
> > + mlx5_counters_init[i].dpdk_name);
> > + priv_unlock(priv);
> > + }
> > + return xstats_n;
> > +}
> > diff --git a/drivers/net/mlx5/mlx5_trigger.c
> > b/drivers/net/mlx5/mlx5_trigger.c index 2399243..30addd2 100644
> > --- a/drivers/net/mlx5/mlx5_trigger.c
> > +++ b/drivers/net/mlx5/mlx5_trigger.c
> > @@ -91,6 +91,7 @@
> > priv_fdir_enable(priv);
> > priv_dev_interrupt_handler_install(priv, dev);
> > err = priv_flow_start(priv);
> > + priv_xstats_init(priv);
> > priv_unlock(priv);
> > return -err;
> > }
> > --
> > 1.8.3.1
>
> --
> Adrien Mazarguil
> 6WIND
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