netdev - [PATCH 2.6.27] ixgbe: initialize interrupt throttle rate

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080827215014.GA14386@gospo.rdu.redhat.com>
Date:	Wed, 27 Aug 2008 17:50:15 -0400
From:	Andy Gospodarek <andy@...yhouse.net>
To:	netdev@...r.kernel.org
Cc:	stable@...nel.org, jeffrey.t.kirsher@...el.com,
	jesse.brandeburg@...el.com, bruce.w.allan@...el.com
Subject: [PATCH 2.6.27] ixgbe: initialize interrupt throttle rate


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

commit 021230d40ae0e6508d6c717b6e0d6d81cd77ac25
Author: Ayyappan Veeraiyan <ayyappan.veeraiyan@...el.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@...yhouse.net>
CC: stable@...nel.org [2.6.25 and later]

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 34bca16..85e07b5 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2302,6 +2302,12 @@ static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
 	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
 	 * doesn't do us much good if we have a lot more vectors
 	 * than CPU's.  So let's be conservative and only ask for
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html