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Re: [Discuss-gnuradio] usrp_benchmark_usb.py failed max speed

From: Thomas Tsou
Subject: Re: [Discuss-gnuradio] usrp_benchmark_usb.py failed max speed
Date: Tue, 22 Jun 2010 11:55:11 -0700

On Tue, Jun 22, 2010 at 11:15 AM,  <address@hidden> wrote:
> Hello everyone,
> When I run usrp_benchmark_usb.py, the two fastest tests fail, leaving me
> with 8 MB/sec maximum. I have two questions:
> First, how do I get the 16MB and 32MB tests to pass? Do I need a faster CPU?

Perhaps. What type of system are you running on? Restrictions on the
USB bus may also cause issues.

> Second, supposing I can't get a faster system, what is the consequence of
> having a slower maximum speed? Just a smaller bandwidth during
> transmitting and receiving?

usrp_benchmark_usb.py is not particularly reliable as a benchmark per
se. But, in general, if your system can't keep up with the usrp then
you'll lose packets. Reducing the bandwidth is one way to prevent that
from happening.


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