Re: [Discuss-gnuradio] recv frame size

[Ram Al Sabti]

Hi Marcus,

It is RFID reader, that is needed for 2nd part of thesis. I know there are few on GitHub already and I am helping myself with them. So in theory I need to reply in 500us, so I was thinking if I can change recv frame size lower then 1472 it might help.

I am using:   linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.000.git-249-gef57ffcb

Best regards,

Ram

On Thu, Mar 9, 2017 at 2:32 PM, Marcus Müller <address@hidden> wrote:

Hi Ram,

maybe you'd want to tell us about your latency problem first, and then we'd discuss that. In the meantime: yes, that's interesting. What is your UHD version?

Best regards,

Marcus

On 09.03.2017 12:45, Ram Al Sabti wrote:

Hi,

I am new with GNURadio, and so far it is an interesting challenge for my thesis. But for some time now I am stuck with latency problem. I did change ethernet MTU to"600" but I am not sure why that change happens only for UHD sink and not source. I get:
-- Current recv frame size: 1472 bytes
-- Current send frame size: 572 bytes

I am using 2 USRPs X310 with 10G ethernet and 2921 with 1G ehternet. But it mathers not where I have TX/RX, it does always show the same.

I am running on Ubuntu 14.04 and GNURadio 3.7.10.

I would be really grateful for any hint, thank you :)

Best regards,

Ram

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