igb: Make Tx budget for NAPI user adjustable
This change is to make the NAPI budget limits for transmit
adjustable. Currently they are only set to 128, and when
the changes/improvements to NAPI occur to allow for adjustability,
it would be possible to tune the value for optimal
performance with applications such as routing.
v2: remove tie between NAPI and interrupt moderation
fix work limit define name (s/IXGBE/IGB/)
Update patch description to better reflect patch
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index b725937..beab918 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -47,6 +47,7 @@
/* TX/RX descriptor defines */
#define IGB_DEFAULT_TXD 256
+#define IGB_DEFAULT_TX_WORK 128
#define IGB_MIN_TXD 80
#define IGB_MAX_TXD 4096
@@ -177,6 +178,7 @@
u32 eims_value;
u16 cpu;
+ u16 tx_work_limit;
u16 itr_val;
u8 set_itr;
@@ -266,6 +268,7 @@
u16 rx_itr;
/* TX */
+ u16 tx_work_limit;
u32 tx_timeout_count;
int num_tx_queues;
struct igb_ring *tx_ring[16];