On 6/8/2013 9:46 PM, Alex Flex wrote:
> So I bought a NIC (using the Intel 82579V chipset) that supports Dual
> RX and TX queues , my goal with that is so iam able to see and use two
> IRQs in /proc/interrupts and hence be able to take advantage of 2 cores
> on my CPU. Instead I only see one IRQ being used, and hence only one CPU
> core.. Please see below.
>
> Advisement is appreciated!
wait, the 82579 is just a PHY layer for the Intel 6 Series Express CPU
chipset's built in MAC (p67, z68, hm67, etc chipsets for the Sandy
Bridge family of desktop/mobile CPUs). That combination is also a
'entry level' desktop/workstation or 'mobile embedded' grade ethernet
interface, not really a server grade interface at all.
regardless, its a single device. single devices, regardless of how
many queues they may happen to have, are not reentrant, and can not deal
with multiple concurrent IRQ handlers poking at their registers at the
same time.
you might have more luck with something like this
http://ark.intel.com/products/59062/Intel-Ethernet-Server-Adapter-I350-T2
but even so, I doubt it will use multiple CPU cores at the same time,
but it probably WILL significantly reduce the CPU overhead of dealing
with high volume ethernet traffic.
--
john r pierce 37N 122W
somewhere on the middle of the left coast
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