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| author | Gabor Juhos <juhosg@openwrt.org> | 2012-05-23 21:05:23 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2012-05-23 21:05:23 +0000 |
| commit | e4720dfa9594cb75ef6691e669f81e8207a00e39 (patch) | |
| tree | 0e6733fabe2c8aee61ed3c4dbe78ac7c64fdea01 /target/linux/ramips/files/drivers/net | |
| parent | 1d286fd7552a6cd497b5d05a7c92d3b19677fc4b (diff) | |
| download | upstream-e4720dfa9594cb75ef6691e669f81e8207a00e39.tar.gz upstream-e4720dfa9594cb75ef6691e669f81e8207a00e39.tar.bz2 upstream-e4720dfa9594cb75ef6691e669f81e8207a00e39.zip | |
ramips: Add byte queue limits support to net/ethernet/ramips_main.c
Add byte queue limits support to net/ethernet/ramips_main.c
"Byte queue limits are a mechanism to limit the size of the transmit
hardware queue on a NIC by number of bytes. The goal of these byte
limits is too reduce latency (HOL blocking) caused by excessive
queuing in hardware (aka buffer bloat) without sacrificing
throughput."
Signed-off-by: Tobias Diedrich <ranma+openwrt@tdiedrich.de>
SVN-Revision: 31844
Diffstat (limited to 'target/linux/ramips/files/drivers/net')
| -rw-r--r-- | target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c index beceb9441e..3d0956860f 100644 --- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c +++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c @@ -177,6 +177,8 @@ ramips_ring_cleanup(struct raeth_priv *re) txi->tx_skb = NULL; } } + + netdev_reset_queue(re->netdev); } #if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883) @@ -699,6 +701,7 @@ ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0); + netdev_sent_queue(dev, skb->len); spin_unlock(&re->page_lock); return NETDEV_TX_OK; @@ -780,6 +783,7 @@ ramips_eth_tx_housekeeping(unsigned long ptr) { struct net_device *dev = (struct net_device*)ptr; struct raeth_priv *re = netdev_priv(dev); + unsigned int bytes_compl = 0, pkts_compl = 0; spin_lock(&re->page_lock); while (1) { @@ -792,12 +796,16 @@ ramips_eth_tx_housekeeping(unsigned long ptr) if (!(txd->txd2 & TX_DMA_DONE) || !(txi->tx_skb)) break; + pkts_compl++; + bytes_compl += txi->tx_skb->len; + dev_kfree_skb_irq(txi->tx_skb); txi->tx_skb = NULL; re->skb_free_idx++; if (re->skb_free_idx >= NUM_TX_DESC) re->skb_free_idx = 0; } + netdev_completed_queue(dev, pkts_compl, bytes_compl); spin_unlock(&re->page_lock); ramips_fe_int_enable(RAMIPS_TX_DLY_INT); |