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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2010-11-16 19:27:08 -0800 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2010-11-16 19:27:08 -0800 |
| commit | 125601bf03a13e24d3785ccbc3a25ad401c92772 (patch) | |
| tree | 3328523f9ce7e721afded93e862baddbc2304430 /drivers/net/ixgbe/ixgbe_main.c | |
| parent | bf29ee6c4819a86ba0209281550b230889b8ebe6 (diff) | |
| download | linux-125601bf03a13e24d3785ccbc3a25ad401c92772.tar.gz linux-125601bf03a13e24d3785ccbc3a25ad401c92772.tar.bz2 linux-125601bf03a13e24d3785ccbc3a25ad401c92772.zip | |
ixgbe: simplify math and improve stack use of ixgbe_set_itr functions
This change is meant to improve the stack utilization and simplify the math
used in ixgbe_set_itr_msix.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_main.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index f2e81a21186a..3ad754824ffa 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -1617,14 +1617,13 @@ void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector) static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector) { struct ixgbe_adapter *adapter = q_vector->adapter; + int i, r_idx; u32 new_itr; u8 current_itr, ret_itr; - int i, r_idx; - struct ixgbe_ring *rx_ring, *tx_ring; r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); for (i = 0; i < q_vector->txr_count; i++) { - tx_ring = adapter->tx_ring[r_idx]; + struct ixgbe_ring *tx_ring = adapter->tx_ring[r_idx]; ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, q_vector->tx_itr, tx_ring->total_packets, @@ -1639,7 +1638,7 @@ static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector) r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); for (i = 0; i < q_vector->rxr_count; i++) { - rx_ring = adapter->rx_ring[r_idx]; + struct ixgbe_ring *rx_ring = adapter->rx_ring[r_idx]; ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, q_vector->rx_itr, rx_ring->total_packets, @@ -1670,7 +1669,7 @@ static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector) if (new_itr != q_vector->eitr) { /* do an exponential smoothing */ - new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); + new_itr = ((q_vector->eitr * 9) + new_itr)/10; /* save the algorithm value here, not the smoothed one */ q_vector->eitr = new_itr; @@ -2270,10 +2269,10 @@ out: static void ixgbe_set_itr(struct ixgbe_adapter *adapter) { struct ixgbe_q_vector *q_vector = adapter->q_vector[0]; - u8 current_itr; - u32 new_itr = q_vector->eitr; struct ixgbe_ring *rx_ring = adapter->rx_ring[0]; struct ixgbe_ring *tx_ring = adapter->tx_ring[0]; + u32 new_itr = q_vector->eitr; + u8 current_itr; q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr, q_vector->tx_itr, @@ -2303,9 +2302,9 @@ static void ixgbe_set_itr(struct ixgbe_adapter *adapter) if (new_itr != q_vector->eitr) { /* do an exponential smoothing */ - new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); + new_itr = ((q_vector->eitr * 9) + new_itr)/10; - /* save the algorithm value here, not the smoothed one */ + /* save the algorithm value here */ q_vector->eitr = new_itr; ixgbe_write_eitr(q_vector); |