Commit e090bfb9 authored by Edward Cree's avatar Edward Cree Committed by David S. Miller

sfc: batch up RX delivery

Improves packet rate of 1-byte UDP receives by up to 10%.
Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f6ad8c1b
......@@ -264,11 +264,17 @@ static int efx_check_disabled(struct efx_nic *efx)
static int efx_process_channel(struct efx_channel *channel, int budget)
{
struct efx_tx_queue *tx_queue;
struct list_head rx_list;
int spent;
if (unlikely(!channel->enabled))
return 0;
/* Prepare the batch receive list */
EFX_WARN_ON_PARANOID(channel->rx_list != NULL);
INIT_LIST_HEAD(&rx_list);
channel->rx_list = &rx_list;
efx_for_each_channel_tx_queue(tx_queue, channel) {
tx_queue->pkts_compl = 0;
tx_queue->bytes_compl = 0;
......@@ -291,6 +297,10 @@ static int efx_process_channel(struct efx_channel *channel, int budget)
}
}
/* Receive any packets we queued up */
netif_receive_skb_list(channel->rx_list);
channel->rx_list = NULL;
return spent;
}
......@@ -555,6 +565,8 @@ static int efx_probe_channel(struct efx_channel *channel)
goto fail;
}
channel->rx_list = NULL;
return 0;
fail:
......
......@@ -448,6 +448,7 @@ enum efx_sync_events_state {
* __efx_rx_packet(), or zero if there is none
* @rx_pkt_index: Ring index of first buffer for next packet to be delivered
* by __efx_rx_packet(), if @rx_pkt_n_frags != 0
* @rx_list: list of SKBs from current RX, awaiting processing
* @rx_queue: RX queue for this channel
* @tx_queue: TX queues for this channel
* @sync_events_state: Current state of sync events on this channel
......@@ -500,6 +501,8 @@ struct efx_channel {
unsigned int rx_pkt_n_frags;
unsigned int rx_pkt_index;
struct list_head *rx_list;
struct efx_rx_queue rx_queue;
struct efx_tx_queue tx_queue[EFX_TXQ_TYPES];
......
......@@ -634,6 +634,11 @@ static void efx_rx_deliver(struct efx_channel *channel, u8 *eh,
return;
/* Pass the packet up */
if (channel->rx_list != NULL)
/* Add to list, will pass up later */
list_add_tail(&skb->list, channel->rx_list);
else
/* No list, so pass it up now */
netif_receive_skb(skb);
}
......
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