From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Mark Ryden" Subject: Two Dual Core processors and NICS (not handling interrupts on one CPU/assigning a Two Dual Core processors and NICS (not handling interrupts on one CPU / assigning a CPU to a NIC) Date: Mon, 15 Jan 2007 11:15:52 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from nf-out-0910.google.com ([64.233.182.184]:51734 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932125AbXAOJPy (ORCPT ); Mon, 15 Jan 2007 04:15:54 -0500 Received: by nf-out-0910.google.com with SMTP id o25so2008269nfa for ; Mon, 15 Jan 2007 01:15:53 -0800 (PST) To: netdev@vger.kernel.org Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hello, I have a machine with 2 dual core CPUs. This machine runs Fedora Core 6. I have two Intel e1000 GigaBit network cards on this machine; I use bonding so that the machine assigns the same IP address to both NICs ; It seems to me that bonding is configured OK, bacuse when running: "cat /proc/net/bonding/bond0" I get: Ethernet Channel Bonding Driver: v3.0.3 (March 23, 2006) Bonding Mode: load balancing (round-robin) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth0 MII Status: up Link Failure Count: 1 Permanent HW addr: ..... Slave Interface: eth1 MII Status: up Link Failure Count: 1 Permanent HW addr: .... (And the Permanent HW addr is diffenet in these two entries). I send a large amount of packets to this machine (more than 20,000 in a second). cat /proc/interrupts shops something like this: CPU0 CPU1 CPU2 CPU3 50: 3359337 0 0 0 PCI-MSI eth0 58: 49 3396136 0 0 PCI-MSI eth1 CPU0 and CPU1 are of the first CPU as far as I understand ; so this means as far as I understand that the second CPU (which has CPU3 and CPU4) does not handle interrupts of the arrived packets; Can I somehow change it so the second CPU will also handle network interrupts of receiving packets on the nic ? Can I assign one CPU to eth0 and the second CPU to eth1 ? Regards, Mark