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Re: [Discuss-gnuradio] Flex2400 and benchmark_rx.py - receiving only fra


From: sri ram
Subject: Re: [Discuss-gnuradio] Flex2400 and benchmark_rx.py - receiving only fraction of packets
Date: Mon, 24 Dec 2007 15:39:48 -0500

Hello Dan,
                Using a higher decimation rate (128) , that problem does not arise.

Thanks,
Sriram

On Dec 24, 2007 3:16 PM, sri ram < address@hidden> wrote:
Hello Dan,
                I see that the u0 occurs once every 3 entries which could explain the ratio between the packets that are received and sent.

I am using a Pentium4 1.8GHz CPU. 'top' tells me that the processor is 98% free and memory is also 95% free.
Do you still think that this computer is slow or is there any other problem that could have happened (such as the USB)?
I use a USB PCI card and the usrp_benchmark_usb gives 16MBps without u0s.

Thanks for your quick response,
Sriram.


On Dec 24, 2007 2:58 PM, Dan Halperin <address@hidden> wrote:
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sri ram wrote:
> P.S. I am attaching the output of the rx side.

uOok =  True  pktno =   47  n_rcvd =   48  n_right =   48
ok =  True  pktno =   48  n_rcvd =   49  n_right =   49
ok =  True  pktno =   49  n_rcvd =   50  n_right =   50
ok =  True  pktno =   50  n_rcvd =   51  n_right =   51
uOok =  True  pktno =   51  n_rcvd =   52  n_right =   52
ok = False  pktno =   52  n_rcvd =   53  n_right =   52
ok = False  pktno =   54  n_rcvd =   54  n_right =   52
uOok = False  pktno =   56  n_rcvd =   55  n_right =   52
ok = False  pktno =   58  n_rcvd =   56  n_right =   52

- --

The USRP Overruns (the 'uO's indicated above) mean that your computer is
not fast enough to process this data. Is the processor too slow? Are you
running other applications in the background?

- -Dan
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