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Re: [Discuss-gnuradio] RFNoC Error

From: Martin Braun
Subject: Re: [Discuss-gnuradio] RFNoC Error
Date: Thu, 3 Mar 2016 13:33:24 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

PCIe is somewhat supported with RFNoC, but it's not as flexible as
Ethernet. It can only support a very limited number of blocks. If you
use Ethernet, this problem will not appear. Also, you don't have to keep
rebooting your machine.

We will make PCIe more useful in the future, but there will always be
some limitation compared to Ethernet. Right now, you can support 2
blocks (e.g. 2 radios) with one streaming port each.


On 03/03/2016 05:06 AM, Simon Olvhammar wrote:
> Hi,
> I am trying to get a RFNoC build working. I have done everything at
> https://github.com/EttusResearch/uhd/wiki/RFNoC:-Getting-Started
> However when running uhd_usrp_probe --init-only
> I get the following error:
> -- [RFNOC] ------- Block Setup -----------
> -- [X300] Assigning PCIe DMA channel 6 to SID 00:06>02:80
> Error: RuntimeError: Trying to allocate more DMA channels than are available
> Any ideas?
> /Simon
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> Discuss-gnuradio mailing list
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