A problem is found on i350 VF. TX will happen once per 4 packets. If only 1~3 packets are received, they will not be forwarded.
The reason is the default RX write-back threshold is changed to 4. This patch changes the value back to 0, so every packet can be handled immediately. Fixes: 4a41c17dba18 (igb: set default thresholds based on MAC type) Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com> --- drivers/net/e1000/igb_ethdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c index bd0ae26..34120ae 100644 --- a/drivers/net/e1000/igb_ethdev.c +++ b/drivers/net/e1000/igb_ethdev.c @@ -64,7 +64,7 @@ #define IGB_DEFAULT_RX_PTHRESH ((hw->mac.type == e1000_i354) ? 12 : 8) #define IGB_DEFAULT_RX_HTHRESH 8 -#define IGB_DEFAULT_RX_WTHRESH ((hw->mac.type == e1000_82576) ? 1 : 4) +#define IGB_DEFAULT_RX_WTHRESH 0 #define IGB_DEFAULT_TX_PTHRESH ((hw->mac.type == e1000_i354) ? 20 : 8) #define IGB_DEFAULT_TX_HTHRESH 1 -- 1.9.3
