Re: [Discuss-gnuradio] New implementation for fusb_linux withoutallocs/frees

[Marcus D. Leech]

Eric Blossom wrote:
> Marcus, in my experience, USB performance has not be limited by cpu
> cycles.  It seems to be primarily a function of the design of the host
> controller, the firmware in the device, and a reasonable way to get
> the data into user mode.  In most apps I've benchmarked, the overhead
> of all usrp related stuff is typically on the order of 5 to 10% of the
> total cycles consumed.
>
> Eric
>
>   
OK, so improving total USB cycle counts in user mode from 10% to 5%
perhaps wouldn't noticeably improve
  things like overruns--is that what you're saying?

So, in your experience what is the sh*t-hottest USB controller out
there, and is it available on a PCI or PCI-E card?


-- 
Marcus Leech
Principal Investigator, Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org