Mark Ryden wrote:
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 ?
you will most likely have better performance from the shared cache on the core 2 duo by
keeping it the way that it is right now - packets that need to transverse the bridge now
make the cpus happy because after receive the sending NIC already has the data in it's
cache. Moving one of the NICs over to cpu2/cpu3 would cause a cascade of cache misses
for every packet that passes across the two nics in the bridge.
Cheers,
Auke
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