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Re: [Discuss-gnuradio] Re: UHD Announcement - February 25rd 2011

From: Josh Blum
Subject: Re: [Discuss-gnuradio] Re: UHD Announcement - February 25rd 2011
Date: Mon, 28 Feb 2011 11:35:49 -0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20101208 Lightning/1.0b2 Thunderbird/3.1.7

On 02/28/2011 08:21 AM, Feng Andrew Ge wrote:
> Josh,
> Thanks for sharing the information and your changes sound quite reasonable.
> However, it seems that your changes have introduced some bugs at the
> transmitter side. I updated my system using your new code (following
> your instructions in your Feb. 24's email titled "Re: GRC + N210 +
> RFX2200 + UHD not working"); then I ran python-based benchmark_tx.py. I
> tested two cases: in the first case, I sent packets continuously and it
> worked well; in the second case, I sent packets every second and the
> transmitter side could send only about 10~12 packets, then stopped
> sending data into USRP2 (based on observation from wireshark results).
> Both cases used 1500B for each packet and the send-buff-size was 100kB.

I think this is a problem in gr-uhd:

I am putting a time stamp into the packet. This is helpful for a
multi-channel continuous transmission, but not single channel

Can you apply the diff attached and let me know if that fixes the problem?


Attachment: gr_uhd_usrp_sink.diff
Description: Text Data

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