Chelsio netmap support ? (RELENG_11)

[Mike Tancsa]

On 3/7/2017 9:08 PM, Navdeep Parhar wrote:
> On Tue, Mar 7, 2017 at 5:46 PM, Mike Tancsa <mike at sentex.net> wrote:
> 
>>
>> # dmesg | grep netm
>> netmap: loaded module
>> vcxl0: netmap queues/slots: TX 2/1023, RX 2/1024
>> vcxl0: 1 txq, 1 rxq (NIC); 1 txq, 1 rxq (TOE); 2 txq, 2 rxq (netmap)
>> vcxl1: netmap queues/slots: TX 2/1023, RX 2/1024
>> vcxl1: 1 txq, 1 rxq (NIC); 1 txq, 1 rxq (TOE); 2 txq, 2 rxq (netmap)
>> igb0: netmap queues/slots: TX 4/1024, RX 4/1024
>> igb1: netmap queues/slots: TX 4/1024, RX 4/1024
>>
>> It maxes out at about 800Kpps with and without netmap.  Is there a way
> 
> Are you actually using a netmap based application that acts as a
> packet router or is this just the vcxl interface running as a normal
> ifnet?

the later, vcxl running normal ifnet. I thought there would be a benefit
to utilizing netmap ?  Sorry, this is not clear to me.

> 
>> to increase the queues for the Chelsio nic, like the onboard igb ?
> 
> If you're not running a netmap based router get rid of the num_vis=2
> and simply try with the cxl0/cxl1 interfaces.  They should each have 4
> rxq/4 txq on your system.  In case you want to increase the number of
> queues, use this:

The tests with the regular cxl also show the box topping out at 0.8Mpps
for forwarding.

> 
> The "NIC" queues are the normal tx/rx queues, the "netmap" queues are
> active when the interface is in netmap mode.
> 
> Does netsend generate a single flow or multiple flows?  If it's a
> single flow it will use a single queue only.

I think its as a single flow. However, I was using a separate box to
generate a second flow as well. It still topped out at about 800Kpps
before dropping packets.

	---Mike



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Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
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