Re: [PATCH] net: hisilicon: Fix ping latency when deal with high throughput

From: Joe Perches
Date: Sat Oct 26 2019 - 11:45:06 EST

On Sat, 2019-10-26 at 16:49 +0800, Jiangfeng Xiao wrote:
> This is due to error in over budget processing.
> When dealing with high throughput, the used buffers
> that exceeds the budget is not cleaned up. In addition,
> it takes a lot of cycles to clean up the used buffer,
> and then the buffer where the valid data is located can take effect.
> diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
> @@ -575,7 +575,7 @@ static int hip04_rx_poll(struct napi_struct *napi, int budget)
> struct hip04_priv *priv = container_of(napi, struct hip04_priv, napi);
> struct net_device *ndev = priv->ndev;
> struct net_device_stats *stats = &ndev->stats;
> - unsigned int cnt = hip04_recv_cnt(priv);
> + static unsigned int cnt_remaining;

static doesn't seem a great idea here as it's for just a single
driver instance. Maybe make this part of struct hip04_priv?