diff options
| author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-23 21:05:23 +0000 |
|---|---|---|
| committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-23 21:05:23 +0000 |
| commit | 4a1bbe457a7458b033a96ad91ff031bb31852754 (patch) | |
| tree | a5066b3f846175585ce02d840562d44c0dddf2e3 /target/linux/ramips/files | |
| parent | 7d9b44911886b29014b86091236f060e5fc3c0d3 (diff) | |
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>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31844 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ramips/files')
| -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 beceb9441..3d0956860 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); |