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hv_netvsc: report stop_queue and wake_queue 

Report the numbers of events for stop_queue and wake_queue in
ethtool stats.

Example:
ethtool -S eth0
NIC statistics:
	...
	stop_queue: 7
	wake_queue: 7
	...

Signed-off-by: Simon Xiao <sixiao@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Simon Xiao 2017-09-29 11:39:46 -07:00 committed by David S. Miller
parent 721e08dad1
commit 09af87d18f
3 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/hyperv/hyperv_net.h
View File

@ -686,6 +686,8 @@ struct netvsc_ethtool_stats {
unsigned long tx_busy;
unsigned long tx_send_full;
unsigned long rx_comp_busy;
unsigned long stop_queue;
unsigned long wake_queue;
};
struct netvsc_vf_pcpu_stats {

12
drivers/net/hyperv/netvsc.c
View File

@ -609,6 +609,7 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device,
{
struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id;
struct net_device *ndev = hv_get_drvdata(device);
struct net_device_context *ndev_ctx = netdev_priv(ndev);
struct vmbus_channel *channel = device->channel;
u16 q_idx = 0;
int queue_sends;
@ -643,8 +644,10 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device,
if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) &&
(hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER ||
queue_sends < 1))
queue_sends < 1)) {
netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx));
ndev_ctx->eth_stats.wake_queue++;
}
}
static void netvsc_send_completion(struct netvsc_device *net_device,
@ -749,6 +752,7 @@ static inline int netvsc_send_pkt(
&net_device->chan_table[packet->q_idx];
struct vmbus_channel *out_channel = nvchan->channel;
struct net_device *ndev = hv_get_drvdata(device);
struct net_device_context *ndev_ctx = netdev_priv(ndev);
struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx);
u64 req_id;
int ret;
@ -789,12 +793,16 @@ static inline int netvsc_send_pkt(
if (ret == 0) {
atomic_inc_return(&nvchan->queue_sends);
if (ring_avail < RING_AVAIL_PERCENT_LOWATER)
if (ring_avail < RING_AVAIL_PERCENT_LOWATER) {
netif_tx_stop_queue(txq);
ndev_ctx->eth_stats.stop_queue++;
}
} else if (ret == -EAGAIN) {
netif_tx_stop_queue(txq);
ndev_ctx->eth_stats.stop_queue++;
if (atomic_read(&nvchan->queue_sends) < 1) {
netif_tx_wake_queue(txq);
ndev_ctx->eth_stats.wake_queue++;
ret = -ENOSPC;
}
} else {

2
drivers/net/hyperv/netvsc_drv.c
View File

@ -1126,6 +1126,8 @@ static const struct {
{ "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) },
{ "tx_send_full", offsetof(struct netvsc_ethtool_stats, tx_send_full) },
{ "rx_comp_busy", offsetof(struct netvsc_ethtool_stats, rx_comp_busy) },
{ "stop_queue", offsetof(struct netvsc_ethtool_stats, stop_queue) },
{ "wake_queue", offsetof(struct netvsc_ethtool_stats, wake_queue) },
}, vf_stats[] = {
{ "vf_rx_packets", offsetof(struct netvsc_vf_pcpu_stats, rx_packets) },
{ "vf_rx_bytes", offsetof(struct netvsc_vf_pcpu_stats, rx_bytes) },