Hi zhuyi,
Thanks for your reply. UDP traffic is used for my testing. Only one core
was being used for the trasmission of packets on both 1G and 10G
interfaces.
Can you let us know your opinion and inputs which would help us fix this
issue..
Thanks
Abhinay
On Fri, Sep 13, 2013 at 10:01 AM, zhuyj <[email protected]> wrote:
> With tcp or raw IP?
>
> Best Regards!
> Zhu Yanjun
>
>
> On 09/13/2013 03:17 PM, arun abhinay wrote:
>
> Hi,
>
> Please redirect me if this is not the correct forum for my question.
>
> I am trying to check the thourgh put rate on 10G and 1G interfaces using
> traffic generator with configuration as mentioned below on a x86_64
> machine.
>
> 1G Iface setup
> Traffic Generator Port1 ----> eth0 <x86_64 machine> eth1 ---> Traffic
> Generator Port2
>
> 10G Iface setup
> Traffic Generator Port3 ----> eth2 <x86_64 machine> eth3 --->
> Traffic Generator Port4
>
> Only 1G ifaces or 10G ifaces are tested at any time and Traffic is full
> duplex.
> Traffic generator port1 and port3 has 100 IP addresses configured, Traffic
> generator ports2 and 4 have only 1 IP address. This means that traffic is
> send from 100 source addresses to 1 destination address and (because full
> duplex traffic) from 1 source address to 100 destination addresses. Result
> is 200 different source-destination pairs (I.e 200 "flows").
>
> When comparing maximum packets per second forwarding rate of 1G interfaces
> (eth0 and eth1) to the maximum forwarding rate of 10G interfaces (eth2 and
> eth3), the 10G interfaces is slower with small packets (74 bytes). With
> small IP packets (74Byte) the limiting factor is the CPU processing power.
> At the maximum pps rate , the CPU core is loaded 100% in both 1G and 10G
> ifaces case. Please find the attached excel sheets which show thorough put
> rates on 1G and 10G interfaces with various packet sizes. With 74Byte
> packet and 1G ifaces the bit rate is about 584Mbps whereas 10G ifaces and
> 74Byte packet the max is about 278Mbps.
>
> Can you please check and let us know why the thoughput rate of 10G
> interfaces is less than throughput rate of 1G interfaces with smaller
> packet frames. Is the ixgbe driver less efficient than igb driver with
> small packets. Please let me know if any futher information is required.
> The ethernet driver details and settings are as mentioned below
> Driver information
> -------------------------
> 1G ethernet ports eth0 and eth1
> # ethtool -i eth0
> driver: igb
> version: 3.1.16
> firmware-version: 0.9-1
> bus-info: 0000:01:00.1
> 10G ethernet ports eth0 and eth1
> # ethtool -i eth2
> driver: ixgbe
> version: 3.1.17-NAPI
> firmware-version: 4.2-1
> bus-info: 0000:02:00.0
>
> Setting are same on 1G and 10G interfaces
> ---------------------------------------------------------
> 1G iface:
> # ethtool -k eth0
> Offload parameters for eth0:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: on
> large-receive-offload: off
>
> 10G iface:
> # ethtool -k eth2
> Offload parameters for eth2:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: on
> large-receive-offload: off
>
>
>
>
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