ixgbe: Re-adjust ring layouts to have better cacheline efficiency
This patch rearranges the ixgbe_ring struct to make better use of
cacheline efficiency.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index f2206e2..cd22323 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -121,19 +121,18 @@
struct ixgbe_ring {
void *desc; /* descriptor ring memory */
- dma_addr_t dma; /* phys. address of descriptor ring */
- unsigned int size; /* length in bytes */
- unsigned int count; /* amount of descriptors */
- unsigned int next_to_use;
- unsigned int next_to_clean;
- u8 atr_sample_rate;
- u8 atr_count;
-
- int queue_index; /* needed for multiqueue queue management */
union {
struct ixgbe_tx_buffer *tx_buffer_info;
struct ixgbe_rx_buffer *rx_buffer_info;
};
+ u8 atr_sample_rate;
+ u8 atr_count;
+ u16 count; /* amount of descriptors */
+ u16 rx_buf_len;
+ u16 next_to_use;
+ u16 next_to_clean;
+
+ u8 queue_index; /* needed for multiqueue queue management */
u16 head;
u16 tail;
@@ -141,20 +140,24 @@
unsigned int total_bytes;
unsigned int total_packets;
- u16 reg_idx; /* holds the special value that gets the hardware register
- * offset associated with this ring, which is different
- * for DCB and RSS modes */
-
#ifdef CONFIG_IXGBE_DCA
/* cpu for tx queue */
int cpu;
#endif
+
+ u16 work_limit; /* max work per interrupt */
+ u16 reg_idx; /* holds the special value that gets
+ * the hardware register offset
+ * associated with this ring, which is
+ * different for DCB and RSS modes
+ */
+
struct ixgbe_queue_stats stats;
unsigned long reinit_state;
+ u64 rsc_count; /* stat for coalesced packets */
- u16 work_limit; /* max work per interrupt */
- u16 rx_buf_len;
- u64 rsc_count; /* stat for coalesced packets */
+ unsigned int size; /* length in bytes */
+ dma_addr_t dma; /* phys. address of descriptor ring */
};
enum ixgbe_ring_f_enum {