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Date: Tue, 26 Aug 2014 11:26:28 +0400
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From: Sergey Mironov <grrwlf@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
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Subject: Re: [dpdk-dev] Fwd: ixgbe network card has dev_info.max_rx_queues
	== 0
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Yep, I understand now. The manual [1] says that intel 827574
controller (controlled by e1000 driver) has only 2 ports per port.
Thanks for the help.
Sergey

[1] - http://www.intel.com/content/www/us/en/ethernet-controllers/i211-ethernet-controller-datasheet.html

PS
I actually have another machine SCB-8973 equipped with i211
controller, where DPDK returns number of queues - zero. Probably, it
is a hardware bug, but I'll better start another thread for this
issue.


2014-08-26 4:14 GMT+04:00 Stephen Hemminger <stephen@networkplumber.org>:
> On Mon, 25 Aug 2014 13:41:34 +0400
> Sergey Mironov <grrwlf@gmail.com> wrote:
>
>> Hi. I've found more data on this issue. My machine (CB-8970) is
>> equipped with two ixgbe and six e1000 ports + one more e1000 port as
>> management interface.
>> I ask the DPDK to allocate 3 TX queues and 3 RX queues for each of 8
>> working ports, 6 * 8 = 48 queues (see the configuration code snippet
>> at the end of the letter)
>
> You need to look at dev_info and not allocate more queues than the
> hardware supports. Many E1000 devices only support a single queue.