e1000: Add performance enahancement by balancing TX and RX

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 58561a4955e3..e80378a220d4 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3349,6 +3349,9 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter,
         struct e1000_tx_desc *tx_desc, *eop_desc;
         struct e1000_buffer *buffer_info;
         unsigned int i, eop;
+#ifdef CONFIG_E1000_NAPI
+        unsigned int count = 0;
+#endif
         boolean_t cleaned = FALSE;
 
         i = tx_ring->next_to_clean;
@@ -3370,6 +3373,11 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter,
 
                 eop = tx_ring->buffer_info[i].next_to_watch;
                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
+#ifdef CONFIG_E1000_NAPI
+#define E1000_TX_WEIGHT 64
+                /* weight of a sort for tx, to avoid endless transmit cleanup */
+                if (count++ == E1000_TX_WEIGHT) break;
+#endif
         }
 
         tx_ring->next_to_clean = i;