On Thu, Sep 13, 2007 at 02:03:55AM +0200, Vincenzo Pellegrini wrote: > AMD sempron 3000+, 512KiB RAM > USB2.0 on board
> 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 > Controller (rev 0f) > 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 > Controller (rev 0f) > 00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 > Controller (rev 0f) > 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 > Controller Vincenzo, I'm not familiar with this chipset. It's not inconceivable that it's got asymmetric throughput. We've seen that on many PPC host controllers. Eric > On Wed, 2007-09-12 at 16:35 -0700, Eric Blossom wrote: > > 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 _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
