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ixgbevf: Limit lowest interrupt rate for adaptive interrupt moderation to 12K

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This patch is the ixgbevf version of commit 8ac34f10a5 "ixgbe: Limit
lowest interrupt rate for adaptive interrupt moderation to 12K"

The same logic applies here as well as the same results since a netperf
test will starve for memory in the time from one Tx interrupt to the next.
As a result the ixgbevf driver underperformed when compared to vhost_net.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Darin Miller <darin.j.miller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck
2015-09-29 13:11:15 -07:00
committed by Jeff Kirsher
parent d91e3a7d62
commit 8a9ca1104d
3 changed files with 5 additions and 6 deletions
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2
drivers/net/ethernet/intel/ixgbevf/ethtool.c
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@@ -774,7 +774,7 @@ static int ixgbevf_set_coalesce(struct net_device *netdev,
adapter->tx_itr_setting = ec->tx_coalesce_usecs;
if (adapter->tx_itr_setting == 1)
tx_itr_param = IXGBE_10K_ITR;
tx_itr_param = IXGBE_12K_ITR;
else
tx_itr_param = adapter->tx_itr_setting;