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authorFlorian Westphal <fw@strlen.de>2014-10-01 13:38:03 +0200
committerDavid S. Miller <davem@davemloft.net>2014-10-01 16:35:43 -0400
commit1e918876853aa85435e0f17fd8b4a92dcfff53d6 (patch)
treea50c5a25c3bbfadcdd193583f93abbba64a1b64a /drivers/net/ethernet/realtek/r8169.c
parentd0bf4a9e92b9a93ffeeacbd7b6cb83e0ee3dc2ef (diff)
downloadlinux-linaro-stable-1e918876853aa85435e0f17fd8b4a92dcfff53d6.tar.gz
r8169: add support for Byte Queue Limits
tested on RTL8168d/8111d model using 'super_netperf 40' with TCP/UDP_STREAM. Output of while true; do for n in inflight limit; do echo -n $n\ ; cat $n; done; sleep 1; done during netperf run, 100mbit peer: inflight 0 limit 3028 inflight 6056 limit 4542 [ trimmed output for brevity, no limit/inflight changes during test steady-state ] limit 4542 inflight 3028 limit 6122 inflight 0 limit 6122 [ changed cable to 1gbit peer, restart netperf ] inflight 37850 limit 36336 inflight 33308 limit 31794 inflight 33308 limit 31794 inflight 27252 limit 25738 [ again, no changes during test ] inflight 27252 limit 25738 inflight 0 limit 28766 [ change cable to 100mbit peer, restart netperf ] limit 28766 inflight 27370 limit 28766 inflight 4542 limit 5990 inflight 6056 limit 4542 [ .. ] inflight 6056 limit 4542 inflight 0 [end of test] Cc: Francois Romieu <romieu@fr.zoreil.com> Cc: Hayes Wang <hayeswang@realtek.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/realtek/r8169.c')
-rw-r--r--drivers/net/ethernet/realtek/r8169.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index c03891be22d0..54476ba42477 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4733,6 +4733,8 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
RTL_W8(ChipCmd, CmdReset);
rtl_udelay_loop_wait_low(tp, &rtl_chipcmd_cond, 100, 100);
+
+ netdev_reset_queue(tp->dev);
}
static void rtl_request_uncached_firmware(struct rtl8169_private *tp)
@@ -6613,6 +6615,8 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
txd->opts2 = cpu_to_le32(opts[1]);
+ netdev_sent_queue(dev, skb->len);
+
skb_tx_timestamp(skb);
wmb();
@@ -6712,6 +6716,7 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp)
{
unsigned int dirty_tx, tx_left;
+ unsigned int bytes_compl = 0, pkts_compl = 0;
dirty_tx = tp->dirty_tx;
smp_rmb();
@@ -6730,10 +6735,8 @@ static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp)
rtl8169_unmap_tx_skb(&tp->pci_dev->dev, tx_skb,
tp->TxDescArray + entry);
if (status & LastFrag) {
- u64_stats_update_begin(&tp->tx_stats.syncp);
- tp->tx_stats.packets++;
- tp->tx_stats.bytes += tx_skb->skb->len;
- u64_stats_update_end(&tp->tx_stats.syncp);
+ pkts_compl++;
+ bytes_compl += tx_skb->skb->len;
dev_kfree_skb_any(tx_skb->skb);
tx_skb->skb = NULL;
}
@@ -6742,6 +6745,13 @@ static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp)
}
if (tp->dirty_tx != dirty_tx) {
+ netdev_completed_queue(tp->dev, pkts_compl, bytes_compl);
+
+ u64_stats_update_begin(&tp->tx_stats.syncp);
+ tp->tx_stats.packets += pkts_compl;
+ tp->tx_stats.bytes += bytes_compl;
+ u64_stats_update_end(&tp->tx_stats.syncp);
+
tp->dirty_tx = dirty_tx;
/* Sync with rtl8169_start_xmit:
* - publish dirty_tx ring index (write barrier)