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authorJesse Brandeburg <jesse.brandeburg@intel.com>2010-05-04 22:26:03 +0000
committerDavid S. Miller <davem@davemloft.net>2010-05-05 21:15:32 -0700
commiteab2abf5826b78b126826cc70e564c44816396da (patch)
treef771389b55090767e8aecdc36f3e80019b3b60bf /drivers/net/e1000/e1000_param.c
parentedf15c17420fed108046da50b3d3ae53dfa0e0ae (diff)
downloadlinux-linaro-android-eab2abf5826b78b126826cc70e564c44816396da.tar.gz
e1000/e1000e: implement a simple interrupt moderation
Back before e1000-7.3.20, the e1000 driver had a simple algorithm that managed interrupt moderation. The driver was updated in 7.3.20 to have the new "adaptive" interrupt moderation but we have customer requests to redeploy the old way as an option. This patch adds the old functionality back. The new functionality can be enabled via module parameter or at runtime via ethtool. Module parameter: (InterruptThrottleRate=4) to use this new moderation method. Ethtool method: ethtool -C ethX rx-usecs 4 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>
Diffstat (limited to 'drivers/net/e1000/e1000_param.c')
-rw-r--r--drivers/net/e1000/e1000_param.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/e1000/e1000_param.c b/drivers/net/e1000/e1000_param.c
index 543c6d1767b..9fbb562dc96 100644
--- a/drivers/net/e1000/e1000_param.c
+++ b/drivers/net/e1000/e1000_param.c
@@ -484,11 +484,17 @@ void __devinit e1000_check_options(struct e1000_adapter *adapter)
adapter->itr_setting = adapter->itr;
adapter->itr = 20000;
break;
+ case 4:
+ e_dev_info("%s set to simplified "
+ "(2000-8000) ints mode\n", opt.name);
+ adapter->itr_setting = adapter->itr;
+ break;
default:
e1000_validate_option(&adapter->itr, &opt,
adapter);
- /* save the setting, because the dynamic bits change itr */
- /* clear the lower two bits because they are
+ /* save the setting, because the dynamic bits
+ * change itr.
+ * clear the lower two bits because they are
* used as control */
adapter->itr_setting = adapter->itr & ~3;
break;