提交 9c0314e1 编写于 作者: V Veaceslav Falico 提交者: David S. Miller

pch_gbe: don't re-set RX_FIFO_ERR flag in napi_poll

If we were in RX_FIFO_ERR state and entered pch_gbe_napi_poll(), we'll
anyway clean some rx space and thus can continue to receive more packets.
Currently, we re-set the RX_FIFO_ERR in situations when we've exhausted our
budget for RX cleaning or cleaned some TX packets. Removing it gives us
+20%-40% speed increase and a lot less of RX_FIFO_ERRors reported.
Signed-off-by: NVeaceslav Falico <vfalico@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 e408a9ff
...@@ -2419,7 +2419,6 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget) ...@@ -2419,7 +2419,6 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
int work_done = 0; int work_done = 0;
bool poll_end_flag = false; bool poll_end_flag = false;
bool cleaned = false; bool cleaned = false;
u32 int_en;
pr_debug("budget : %d\n", budget); pr_debug("budget : %d\n", budget);
...@@ -2436,19 +2435,13 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget) ...@@ -2436,19 +2435,13 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
if (poll_end_flag) { if (poll_end_flag) {
napi_complete(napi); napi_complete(napi);
if (adapter->rx_stop_flag) {
adapter->rx_stop_flag = false;
pch_gbe_start_receive(&adapter->hw);
}
pch_gbe_irq_enable(adapter); pch_gbe_irq_enable(adapter);
} else }
if (adapter->rx_stop_flag) {
adapter->rx_stop_flag = false; if (adapter->rx_stop_flag) {
pch_gbe_start_receive(&adapter->hw); adapter->rx_stop_flag = false;
int_en = ioread32(&adapter->hw.reg->INT_EN); pch_gbe_start_receive(&adapter->hw);
iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR), }
&adapter->hw.reg->INT_EN);
}
pr_debug("poll_end_flag : %d work_done : %d budget : %d\n", pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
poll_end_flag, work_done, budget); poll_end_flag, work_done, budget);
......
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