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net: hns: Optimize hns_nic_common_poll for better performance

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After polling less than buget packages, we need check again. If
there are still some packages, we call napi_schedule add softirq
queue, this is not better way. So we return buget value instead
of napi_schedule.

Signed-off-by: lipeng <lipeng321@huawei.com>
reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
lipeng 2017-04-01 12:03:36 +01:00 committed by David S. Miller
parent 4b7cdecaa4
commit 36eedfde1a
2 changed files with 31 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/net/ethernet/hisilicon/hns/hns_enet.c
View File

@ -859,7 +859,7 @@ static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
return recv_pkts;
}
static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
{
struct hnae_ring *ring = ring_data->ring;
int num = 0;
@ -873,22 +873,23 @@ static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
ring_data->ring, 1);
napi_schedule(&ring_data->napi);
return false;
} else {
return true;
}
}
static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
{
struct hnae_ring *ring = ring_data->ring;
int num = 0;
int num;
num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
if (num == 0)
ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
ring, 0);
if (!num)
return true;
else
napi_schedule(&ring_data->napi);
return false;
}
static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
@ -989,7 +990,7 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
return 0;
}
static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
{
struct hnae_ring *ring = ring_data->ring;
int head;
@ -1002,20 +1003,21 @@ static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
ring_data->ring, 1);
napi_schedule(&ring_data->napi);
return false;
} else {
return true;
}
}
static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
{
struct hnae_ring *ring = ring_data->ring;
int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
if (head == ring->next_to_clean)
ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
ring, 0);
return true;
else
napi_schedule(&ring_data->napi);
return false;
}
static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
@ -1042,15 +1044,23 @@ static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
static int hns_nic_common_poll(struct napi_struct *napi, int budget)
{
int clean_complete = 0;
struct hns_nic_ring_data *ring_data =
container_of(napi, struct hns_nic_ring_data, napi);
int clean_complete = ring_data->poll_one(
ring_data, budget, ring_data->ex_process);
struct hnae_ring *ring = ring_data->ring;
if (clean_complete >= 0 && clean_complete < budget) {
napi_complete(napi);
ring_data->fini_process(ring_data);
return 0;
try_again:
clean_complete += ring_data->poll_one(
ring_data, budget - clean_complete,
ring_data->ex_process);
if (clean_complete < budget) {
if (ring_data->fini_process(ring_data)) {
napi_complete(napi);
ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
} else {
goto try_again;
}
}
return clean_complete;

2
drivers/net/ethernet/hisilicon/hns/hns_enet.h
View File

@ -41,7 +41,7 @@ struct hns_nic_ring_data {
int queue_index;
int (*poll_one)(struct hns_nic_ring_data *, int, void *);
void (*ex_process)(struct hns_nic_ring_data *, struct sk_buff *);
void (*fini_process)(struct hns_nic_ring_data *);
bool (*fini_process)(struct hns_nic_ring_data *);
};
/* compatible the difference between two versions */