Commit 7e50b2a5 authored by David S. Miller's avatar David S. Miller

Merge branch 'virtio_net-Add-ethtool-stat-items'

Toshiaki Makita says:

====================
virtio_net: Add ethtool stat items

Add some ethtool stat items useful for performance analysis.
====================
Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 19725496 461f03dc
......@@ -82,25 +82,55 @@ struct virtnet_sq_stats {
struct u64_stats_sync syncp;
u64 packets;
u64 bytes;
u64 xdp_tx;
u64 xdp_tx_drops;
u64 kicks;
};
struct virtnet_rq_stats {
struct u64_stats_sync syncp;
struct virtnet_rq_stat_items {
u64 packets;
u64 bytes;
u64 drops;
u64 xdp_packets;
u64 xdp_tx;
u64 xdp_redirects;
u64 xdp_drops;
u64 kicks;
};
struct virtnet_rq_stats {
struct u64_stats_sync syncp;
struct virtnet_rq_stat_items items;
};
struct virtnet_rx_stats {
struct virtnet_rq_stat_items rx;
struct {
unsigned int xdp_tx;
unsigned int xdp_tx_drops;
} tx;
};
#define VIRTNET_SQ_STAT(m) offsetof(struct virtnet_sq_stats, m)
#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stats, m)
#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stat_items, m)
static const struct virtnet_stat_desc virtnet_sq_stats_desc[] = {
{ "packets", VIRTNET_SQ_STAT(packets) },
{ "bytes", VIRTNET_SQ_STAT(bytes) },
{ "xdp_tx", VIRTNET_SQ_STAT(xdp_tx) },
{ "xdp_tx_drops", VIRTNET_SQ_STAT(xdp_tx_drops) },
{ "kicks", VIRTNET_SQ_STAT(kicks) },
};
static const struct virtnet_stat_desc virtnet_rq_stats_desc[] = {
{ "packets", VIRTNET_RQ_STAT(packets) },
{ "bytes", VIRTNET_RQ_STAT(bytes) },
{ "drops", VIRTNET_RQ_STAT(drops) },
{ "xdp_packets", VIRTNET_RQ_STAT(xdp_packets) },
{ "xdp_tx", VIRTNET_RQ_STAT(xdp_tx) },
{ "xdp_redirects", VIRTNET_RQ_STAT(xdp_redirects) },
{ "xdp_drops", VIRTNET_RQ_STAT(xdp_drops) },
{ "kicks", VIRTNET_RQ_STAT(kicks) },
};
#define VIRTNET_SQ_STATS_LEN ARRAY_SIZE(virtnet_sq_stats_desc)
......@@ -447,16 +477,22 @@ static int __virtnet_xdp_xmit_one(struct virtnet_info *vi,
return 0;
}
static struct send_queue *virtnet_xdp_sq(struct virtnet_info *vi)
{
unsigned int qp;
qp = vi->curr_queue_pairs - vi->xdp_queue_pairs + smp_processor_id();
return &vi->sq[qp];
}
static int __virtnet_xdp_tx_xmit(struct virtnet_info *vi,
struct xdp_frame *xdpf)
{
struct xdp_frame *xdpf_sent;
struct send_queue *sq;
unsigned int len;
unsigned int qp;
qp = vi->curr_queue_pairs - vi->xdp_queue_pairs + smp_processor_id();
sq = &vi->sq[qp];
sq = virtnet_xdp_sq(vi);
/* Free up any pending old buffers before queueing new ones. */
while ((xdpf_sent = virtqueue_get_buf(sq->vq, &len)) != NULL)
......@@ -474,23 +510,28 @@ static int virtnet_xdp_xmit(struct net_device *dev,
struct bpf_prog *xdp_prog;
struct send_queue *sq;
unsigned int len;
unsigned int qp;
int drops = 0;
int err;
int kicks = 0;
int ret, err;
int i;
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
return -EINVAL;
sq = virtnet_xdp_sq(vi);
qp = vi->curr_queue_pairs - vi->xdp_queue_pairs + smp_processor_id();
sq = &vi->sq[qp];
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) {
ret = -EINVAL;
drops = n;
goto out;
}
/* Only allow ndo_xdp_xmit if XDP is loaded on dev, as this
* indicate XDP resources have been successfully allocated.
*/
xdp_prog = rcu_dereference(rq->xdp_prog);
if (!xdp_prog)
return -ENXIO;
if (!xdp_prog) {
ret = -ENXIO;
drops = n;
goto out;
}
/* Free up any pending old buffers before queueing new ones. */
while ((xdpf_sent = virtqueue_get_buf(sq->vq, &len)) != NULL)
......@@ -505,11 +546,20 @@ static int virtnet_xdp_xmit(struct net_device *dev,
drops++;
}
}
ret = n - drops;
if (flags & XDP_XMIT_FLUSH)
virtqueue_kick(sq->vq);
if (flags & XDP_XMIT_FLUSH) {
if (virtqueue_kick_prepare(sq->vq) && virtqueue_notify(sq->vq))
kicks = 1;
}
out:
u64_stats_update_begin(&sq->stats.syncp);
sq->stats.xdp_tx += n;
sq->stats.xdp_tx_drops += drops;
sq->stats.kicks += kicks;
u64_stats_update_end(&sq->stats.syncp);
return n - drops;
return ret;
}
static unsigned int virtnet_get_headroom(struct virtnet_info *vi)
......@@ -586,7 +636,8 @@ static struct sk_buff *receive_small(struct net_device *dev,
struct receive_queue *rq,
void *buf, void *ctx,
unsigned int len,
unsigned int *xdp_xmit)
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
{
struct sk_buff *skb;
struct bpf_prog *xdp_prog;
......@@ -601,6 +652,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
int err;
len -= vi->hdr_len;
stats->rx.bytes += len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
......@@ -642,6 +694,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
orig_data = xdp.data;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
stats->rx.xdp_packets++;
switch (act) {
case XDP_PASS:
......@@ -650,11 +703,14 @@ static struct sk_buff *receive_small(struct net_device *dev,
len = xdp.data_end - xdp.data;
break;
case XDP_TX:
stats->rx.xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
stats->tx.xdp_tx++;
err = __virtnet_xdp_tx_xmit(vi, xdpf);
if (unlikely(err)) {
stats->tx.xdp_tx_drops++;
trace_xdp_exception(vi->dev, xdp_prog, act);
goto err_xdp;
}
......@@ -662,6 +718,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
stats->rx.xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err)
goto err_xdp;
......@@ -695,7 +752,8 @@ static struct sk_buff *receive_small(struct net_device *dev,
err_xdp:
rcu_read_unlock();
dev->stats.rx_dropped++;
stats->rx.xdp_drops++;
stats->rx.drops++;
put_page(page);
xdp_xmit:
return NULL;
......@@ -705,18 +763,20 @@ static struct sk_buff *receive_big(struct net_device *dev,
struct virtnet_info *vi,
struct receive_queue *rq,
void *buf,
unsigned int len)
unsigned int len,
struct virtnet_rx_stats *stats)
{
struct page *page = buf;
struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
stats->rx.bytes += len - vi->hdr_len;
if (unlikely(!skb))
goto err;
return skb;
err:
dev->stats.rx_dropped++;
stats->rx.drops++;
give_pages(rq, page);
return NULL;
}
......@@ -727,7 +787,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
void *buf,
void *ctx,
unsigned int len,
unsigned int *xdp_xmit)
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
{
struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
u16 num_buf = virtio16_to_cpu(vi->vdev, hdr->num_buffers);
......@@ -740,6 +801,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int err;
head_skb = NULL;
stats->rx.bytes += len - vi->hdr_len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
......@@ -788,6 +850,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
stats->rx.xdp_packets++;
switch (act) {
case XDP_PASS:
......@@ -812,11 +875,14 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
}
break;
case XDP_TX:
stats->rx.xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
stats->tx.xdp_tx++;
err = __virtnet_xdp_tx_xmit(vi, xdpf);
if (unlikely(err)) {
stats->tx.xdp_tx_drops++;
trace_xdp_exception(vi->dev, xdp_prog, act);
if (unlikely(xdp_page != page))
put_page(xdp_page);
......@@ -828,6 +894,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
stats->rx.xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err) {
if (unlikely(xdp_page != page))
......@@ -877,6 +944,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto err_buf;
}
stats->rx.bytes += len;
page = virt_to_head_page(buf);
truesize = mergeable_ctx_to_truesize(ctx);
......@@ -922,6 +990,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
err_xdp:
rcu_read_unlock();
stats->rx.xdp_drops++;
err_skb:
put_page(page);
while (num_buf-- > 1) {
......@@ -932,24 +1001,25 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
dev->stats.rx_length_errors++;
break;
}
stats->rx.bytes += len;
page = virt_to_head_page(buf);
put_page(page);
}
err_buf:
dev->stats.rx_dropped++;
stats->rx.drops++;
dev_kfree_skb(head_skb);
xdp_xmit:
return NULL;
}
static int receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
void *buf, unsigned int len, void **ctx,
unsigned int *xdp_xmit)
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
{
struct net_device *dev = vi->dev;
struct sk_buff *skb;
struct virtio_net_hdr_mrg_rxbuf *hdr;
int ret;
if (unlikely(len < vi->hdr_len + ETH_HLEN)) {
pr_debug("%s: short packet %i\n", dev->name, len);
......@@ -961,23 +1031,22 @@ static int receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
} else {
put_page(virt_to_head_page(buf));
}
return 0;
return;
}
if (vi->mergeable_rx_bufs)
skb = receive_mergeable(dev, vi, rq, buf, ctx, len, xdp_xmit);
skb = receive_mergeable(dev, vi, rq, buf, ctx, len, xdp_xmit,
stats);
else if (vi->big_packets)
skb = receive_big(dev, vi, rq, buf, len);
skb = receive_big(dev, vi, rq, buf, len, stats);
else
skb = receive_small(dev, vi, rq, buf, ctx, len, xdp_xmit);
skb = receive_small(dev, vi, rq, buf, ctx, len, xdp_xmit, stats);
if (unlikely(!skb))
return 0;
return;
hdr = skb_vnet_hdr(skb);
ret = skb->len;
if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID)
skb->ip_summed = CHECKSUM_UNNECESSARY;
......@@ -994,12 +1063,11 @@ static int receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
ntohs(skb->protocol), skb->len, skb->pkt_type);
napi_gro_receive(&rq->napi, skb);
return ret;
return;
frame_err:
dev->stats.rx_frame_errors++;
dev_kfree_skb(skb);
return 0;
}
/* Unlike mergeable buffers, all buffers are allocated to the
......@@ -1166,7 +1234,12 @@ static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
if (err)
break;
} while (rq->vq->num_free);
virtqueue_kick(rq->vq);
if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.items.kicks++;
u64_stats_update_end(&rq->stats.syncp);
}
return !oom;
}
......@@ -1241,22 +1314,25 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
unsigned int *xdp_xmit)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
unsigned int len, received = 0, bytes = 0;
struct virtnet_rx_stats stats = {};
struct send_queue *sq;
unsigned int len;
void *buf;
int i;
if (!vi->big_packets || vi->mergeable_rx_bufs) {
void *ctx;
while (received < budget &&
while (stats.rx.packets < budget &&
(buf = virtqueue_get_buf_ctx(rq->vq, &len, &ctx))) {
bytes += receive_buf(vi, rq, buf, len, ctx, xdp_xmit);
received++;
receive_buf(vi, rq, buf, len, ctx, xdp_xmit, &stats);
stats.rx.packets++;
}
} else {
while (received < budget &&
while (stats.rx.packets < budget &&
(buf = virtqueue_get_buf(rq->vq, &len)) != NULL) {
bytes += receive_buf(vi, rq, buf, len, NULL, xdp_xmit);
received++;
receive_buf(vi, rq, buf, len, NULL, xdp_xmit, &stats);
stats.rx.packets++;
}
}
......@@ -1266,11 +1342,22 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
}
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.bytes += bytes;
rq->stats.packets += received;
for (i = 0; i < VIRTNET_RQ_STATS_LEN; i++) {
size_t offset = virtnet_rq_stats_desc[i].offset;
u64 *item;
item = (u64 *)((u8 *)&rq->stats.items + offset);
*item += *(u64 *)((u8 *)&stats.rx + offset);
}
u64_stats_update_end(&rq->stats.syncp);
return received;
sq = virtnet_xdp_sq(vi);
u64_stats_update_begin(&sq->stats.syncp);
sq->stats.xdp_tx += stats.tx.xdp_tx;
sq->stats.xdp_tx_drops += stats.tx.xdp_tx_drops;
u64_stats_update_end(&sq->stats.syncp);
return stats.rx.packets;
}
static void free_old_xmit_skbs(struct send_queue *sq)
......@@ -1326,7 +1413,7 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
container_of(napi, struct receive_queue, napi);
struct virtnet_info *vi = rq->vq->vdev->priv;
struct send_queue *sq;
unsigned int received, qp;
unsigned int received;
unsigned int xdp_xmit = 0;
virtnet_poll_cleantx(rq);
......@@ -1341,10 +1428,12 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
xdp_do_flush_map();
if (xdp_xmit & VIRTIO_XDP_TX) {
qp = vi->curr_queue_pairs - vi->xdp_queue_pairs +
smp_processor_id();
sq = &vi->sq[qp];
virtqueue_kick(sq->vq);
sq = virtnet_xdp_sq(vi);
if (virtqueue_kick_prepare(sq->vq) && virtqueue_notify(sq->vq)) {
u64_stats_update_begin(&sq->stats.syncp);
sq->stats.kicks++;
u64_stats_update_end(&sq->stats.syncp);
}
}
return received;
......@@ -1506,8 +1595,13 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
}
}
if (kick || netif_xmit_stopped(txq))
virtqueue_kick(sq->vq);
if (kick || netif_xmit_stopped(txq)) {
if (virtqueue_kick_prepare(sq->vq) && virtqueue_notify(sq->vq)) {
u64_stats_update_begin(&sq->stats.syncp);
sq->stats.kicks++;
u64_stats_update_end(&sq->stats.syncp);
}
}
return NETDEV_TX_OK;
}
......@@ -1611,7 +1705,7 @@ static void virtnet_stats(struct net_device *dev,
int i;
for (i = 0; i < vi->max_queue_pairs; i++) {
u64 tpackets, tbytes, rpackets, rbytes;
u64 tpackets, tbytes, rpackets, rbytes, rdrops;
struct receive_queue *rq = &vi->rq[i];
struct send_queue *sq = &vi->sq[i];
......@@ -1623,19 +1717,20 @@ static void virtnet_stats(struct net_device *dev,
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
rpackets = rq->stats.packets;
rbytes = rq->stats.bytes;
rpackets = rq->stats.items.packets;
rbytes = rq->stats.items.bytes;
rdrops = rq->stats.items.drops;
} while (u64_stats_fetch_retry_irq(&rq->stats.syncp, start));
tot->rx_packets += rpackets;
tot->tx_packets += tpackets;
tot->rx_bytes += rbytes;
tot->tx_bytes += tbytes;
tot->rx_dropped += rdrops;
}
tot->tx_dropped = dev->stats.tx_dropped;
tot->tx_fifo_errors = dev->stats.tx_fifo_errors;
tot->rx_dropped = dev->stats.rx_dropped;
tot->rx_length_errors = dev->stats.rx_length_errors;
tot->rx_frame_errors = dev->stats.rx_frame_errors;
}
......@@ -2014,7 +2109,7 @@ static void virtnet_get_ethtool_stats(struct net_device *dev,
for (i = 0; i < vi->curr_queue_pairs; i++) {
struct receive_queue *rq = &vi->rq[i];
stats_base = (u8 *)&rq->stats;
stats_base = (u8 *)&rq->stats.items;
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
for (j = 0; j < VIRTNET_RQ_STATS_LEN; j++) {
......
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