Re: [Discuss-gnuradio] asymmetric USRP throughput

[Eric Blossom]

On Wed, Sep 12, 2007 at 11:55:08PM +0200, Vincenzo Pellegrini wrote:
> I'm beginning to see some light over my 8MHz tx problems..
> 
> the throughput towards my USRP is significantly reduced compared to the
> one from it...
> 
> 
> ./test_usrp_standard_tx
> xfered 1.34e+08 bytes in 5.46 seconds.  2.457e+07 bytes/sec.  cpu time =
> 0.492
> 0 underruns
> 
> 
> ./test_usrp_standard_rx
> xfered 1.34e+08 bytes in 4.19 seconds.  3.2e+07 bytes/sec.  cpu time = 0.384
> noverruns = 0
> 
> 
> what could be the cause for this? any hint..? ( benchmark_usb.py reports a 
> good throughput up to 32M)
> 
> thanks 
> vincenzo

What h/w platform are you on?'
What USB host controller do you have?
Is it on a PCI card, or on the motherboard?

 $ lspci

Eric