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ixgbe: initialize interrupt throttle rate

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This commit dropped the setting of the default interrupt throttle rate.

commit 021230d40a
Author: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Date:   Mon Mar 3 15:03:45 2008 -0800

    ixgbe: Introduce MSI-X queue vector code

The following patch adds it back.  Without this the default value of 0
causes the performance of this card to be awful.  Restoring these to the
default values yields much better performance.

This regression has been around since 2.6.25.

Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: stable@kernel.org [2.6.25 and later]
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Andy Gospodarek 2008-08-27 18:04:32 -07:00 committed by Jeff Garzik
parent e000ea1312
commit 15e79f24b6
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ixgbe/ixgbe_main.c
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@ -2303,6 +2303,12 @@ static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
int err = 0; int err = 0;
int vector, v_budget; int vector, v_budget;
/*
* Set the default interrupt throttle rate.
*/
adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);
/* /*
* It's easy to be greedy for MSI-X vectors, but it really * It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors * doesn't do us much good if we have a lot more vectors