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Re: [Discuss-gnuradio] asymmetric USRP throughput
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] asymmetric USRP throughput |
Date: |
Wed, 12 Sep 2007 16:35:47 -0700 |
User-agent: |
Mutt/1.5.9i |
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