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From 30a3d6e23880094edfc51b49b11099c8b8bfa8cd Mon Sep 17 00:00:00 2001
From: John Lo <loj@cisco.com>
Date: Tue, 7 Jun 2016 12:36:23 +0200
Subject: [PATCH 15/17] ENIC counter improvement
---
drivers/net/enic/enic.h | 7 +++++++
drivers/net/enic/enic_main.c | 38 ++++++++++++++++++++++++++++++++++----
drivers/net/enic/enic_rxtx.c | 15 +++++++--------
3 files changed, 48 insertions(+), 12 deletions(-)
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 43b82a6..7c1b5c9 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -91,6 +91,11 @@ struct enic_fdir {
struct enic_fdir_node *nodes[ENICPMD_FDIR_MAX];
};
+struct enic_soft_stats {
+ rte_atomic64_t rx_nombuf;
+ rte_atomic64_t rx_packet_errors;
+};
+
/* Per-instance private data structure */
struct enic {
struct enic *next;
@@ -133,6 +138,8 @@ struct enic {
/* interrupt resource */
struct vnic_intr intr;
unsigned int intr_count;
+
+ struct enic_soft_stats soft_stats;
};
static inline unsigned int enic_cq_rq(__rte_unused struct enic *enic, unsigned int rq)
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 9bfdec1..a00565a 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -142,22 +142,51 @@ static void enic_log_q_error(struct enic *enic)
}
+static void enic_clear_soft_stats(struct enic *enic)
+{
+ struct enic_soft_stats *soft_stats = &enic->soft_stats;
+ rte_atomic64_clear(&soft_stats->rx_nombuf);
+ rte_atomic64_clear(&soft_stats->rx_packet_errors);
+}
+
+static void enic_init_soft_stats(struct enic *enic)
+{
+ struct enic_soft_stats *soft_stats = &enic->soft_stats;
+ rte_atomic64_init(&soft_stats->rx_nombuf);
+ rte_atomic64_init(&soft_stats->rx_packet_errors);
+ enic_clear_soft_stats(enic);
+}
+
void enic_dev_stats_clear(struct enic *enic)
{
if (vnic_dev_stats_clear(enic->vdev))
dev_err(enic, "Error in clearing stats\n");
+ enic_clear_soft_stats(enic);
}
void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
{
struct vnic_stats *stats;
+ struct enic_soft_stats *soft_stats = &enic->soft_stats;
+ int64_t rx_truncated;
+ uint64_t rx_packet_errors;
if (vnic_dev_stats_dump(enic->vdev, &stats)) {
dev_err(enic, "Error in getting stats\n");
return;
}
- r_stats->ipackets = stats->rx.rx_frames_ok;
+ /* The number of truncated packets can only be calculated by
+ * subtracting a hardware counter from error packets received by
+ * the driver. Note: this causes transient inaccuracies in the
+ * ipackets count. Also, the length of truncated packets are
+ * counted in ibytes even though truncated packets are dropped
+ * which can make ibytes be slightly higher than it should be.
+ */
+ rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
+ rx_truncated = rx_packet_errors - stats->rx.rx_errors;
+
+ r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
r_stats->opackets = stats->tx.tx_frames_ok;
r_stats->ibytes = stats->rx.rx_bytes_ok;
@@ -166,10 +195,9 @@ void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
r_stats->oerrors = stats->tx.tx_errors;
- r_stats->imissed = stats->rx.rx_no_bufs;
+ r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
- r_stats->imcasts = stats->rx.rx_multicast_frames_ok;
- r_stats->rx_nombuf = stats->rx.rx_no_bufs;
+ r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
}
void enic_del_mac_address(struct enic *enic)
@@ -755,6 +783,8 @@ int enic_setup_finish(struct enic *enic)
{
int ret;
+ enic_init_soft_stats(enic);
+
ret = enic_set_rss_nic_cfg(enic);
if (ret) {
dev_err(enic, "Failed to config nic, aborting.\n");
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 138dfb8..174486b 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -251,6 +251,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
struct vnic_cq *cq;
volatile struct cq_desc *cqd_ptr;
uint8_t color;
+ uint16_t nb_err = 0;
cq = &enic->cq[enic_cq_rq(enic, rq->index)];
rx_id = cq->to_clean; /* index of cqd, rqd, mbuf_table */
@@ -278,10 +279,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
/* allocate a new mbuf */
nmb = rte_rxmbuf_alloc(rq->mp);
if (nmb == NULL) {
- dev_err(enic, "RX mbuf alloc failed port=%u qid=%u",
- enic->port_id, (unsigned)rq->index);
- rte_eth_devices[enic->port_id].
- data->rx_mbuf_alloc_failed++;
+ rte_atomic64_inc(&enic->soft_stats.rx_nombuf);
break;
}
@@ -323,9 +321,10 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
enic_cq_rx_to_pkt_flags(&cqd, rxmb);
} else {
- rxmb->pkt_len = 0;
- rxmb->packet_type = 0;
- rxmb->ol_flags = 0;
+ rte_pktmbuf_free(rxmb);
+ rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
+ nb_err++;
+ continue;
}
rxmb->data_len = rxmb->pkt_len;
@@ -337,7 +336,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
rx_pkts[nb_rx++] = rxmb;
}
- nb_hold += nb_rx;
+ nb_hold += nb_rx + nb_err;
cq->to_clean = rx_id;
if (nb_hold > rq->rx_free_thresh) {
--
2.7.4
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