From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Thu, 12 Feb 2009 18:17:21 +0000 (+0000)
Subject: igb: reduce size required to trigger low latency
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=1e5c3d218ac19d5a5e9b3a8f09777c2b555b2499;p=linux-2.6-omap-h63xx.git

igb: reduce size required to trigger low latency

Update the Adaptive Interrupt Moderation algorithm so that the low latency
state is triggered less easily to prevent high interrupt loads.

Signed-off-by: Alexander Duyck <alexander.h.duyck@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/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 53e580bdfe2..86782f9218a 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -2666,7 +2666,7 @@ static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting,
 		if (bytes > 25000) {
 			if (packets > 35)
 				retval = low_latency;
-		} else if (bytes < 6000) {
+		} else if (bytes < 1500) {
 			retval = low_latency;
 		}
 		break;