igb: Improve multiqueue AIM support
Improve multiqueue performance
Change itr_val to reflect ITR timer value instead of ints/sec
Cleaned up AIM algorithms in general
Based on work by Mitch Williams
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index c25ca17..56de7ec 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -47,7 +47,9 @@
#define IGB_MIN_DYN_ITR 3000
#define IGB_MAX_DYN_ITR 96000
-#define IGB_START_ITR 6000
+
+/* ((1000000000ns / (6000ints/s * 1024ns)) << 2 = 648 */
+#define IGB_START_ITR 648
#define IGB_DYN_ITR_PACKET_THRESHOLD 2
#define IGB_DYN_ITR_LENGTH_LOW 200
@@ -170,9 +172,10 @@
};
/* RX */
struct {
- int no_itr_adjust;
struct igb_queue_stats rx_stats;
struct napi_struct napi;
+ int set_itr;
+ struct igb_ring *buddy;
#ifdef CONFIG_IGB_LRO
struct net_lro_mgr lro_mgr;
bool lro_used;
@@ -219,7 +222,6 @@
u32 itr_setting;
u16 tx_itr;
u16 rx_itr;
- int set_itr;
struct work_struct reset_task;
struct work_struct watchdog_task;