[USRP-users] Success report: B200/USB 3.0 card/Core i7-2600

Martin Braun martin.braun at ettus.com
Wed Oct 1 12:48:06 EDT 2014


Thanks!

rx_samples_to_file will give you a reliable idea if you can stream to disk.

Cheers,
M

On 30.09.2014 21:27, Robert McIntyre via USRP-users wrote:
> Ran some tests tonight...
>
> Using:
>
> rx_samples_to_file --rx_rate 32e6 --freq 107.7e6 --time 10 --file
> ./testoutput --stats
>
> I get either a perfect output, or one or two overflows.  And, that's to
> either my SSD, or my 7200 RPM SATA-6 drive.  Which I didn't expect,
> honestly.
>
> But, I tried:
>
> transport_hammer --rx_rate 32e6
>
> And had very bad results.  Not sure what transport_hammer is supposed to
> do, though.
>
> Anyway, hope this helps!
> Robert
>
> ------------------------------------------------------------------------
> To: martin.braun at ettus.com; usrp-users at lists.ettus.com
> Date: Tue, 30 Sep 2014 14:23:41 -0700
> Subject: Re: [USRP-users] Success report: B200/USB 3.0 card/Core i7-2600
> From: usrp-users at lists.ettus.com
>
> Not yet.  I will do that tonight and report back.  The disk, though,
> will definitely be a concern.  I've got a SSD on a SATA-6G link, but
> expect it to have problems.
>
> --Robert
> ------------------------------------------------------------------------
> From: Martin Braun via USRP-users <mailto:usrp-users at lists.ettus.com>
> Sent: ‎9/‎30/‎2014 2:06 PM
> To: usrp-users at lists.ettus.com <mailto:usrp-users at lists.ettus.com>
> Subject: Re: [USRP-users] Success report: B200/USB 3.0 card/Core i7-2600
>
> Hey Robert,
>
> thanks for the data! Out of curiousity, have you also tried streaming to
> disk?
>
> Cheers,
> m
>
> On 30.09.2014 12:44, Robert McIntyre via USRP-users wrote:
>  > Just wanted to drop a quick note about the 100% successful USB transfers
>  > I'm (finally) able to get with my B200.  I'm using the following
> hardware:
>  >
>  > - Asus P8Z68 motherboard
>  > <http://www.newegg.com/Product/Product.aspx?Item=N82E16813131790>
>  > - HooToo HT-PC002 USB 3.0 card
>  >
> <http://www.amazon.com/HT-PC001-SuperSpeed-Expansion-Connector-Capacitors/dp/B00B9R59ZE/ref=sr_1_7?ie=UTF8&qid=1412105646&sr=8-7&keywords=hootoo+usb3+card>
> (based
>  > on VIA VL805)
>  > - Core i7-2600 cpu
>  > - 16GB of RAM
>  > - SSD hard drive
>  > - OS: Debian Testing
>  > - UHD: Built from head of master branch
>  >
>  > I tried the onboard Intel USB 3 ports, and they weren't able to operate
>  > at USB 3.0 at all, they only registered the B200 as USB 2.0.  So, I
>  > added the VL805-based USB 3.0 card, and am able to use the UHD benchmark
>  > tool with a --rx_rate of 32e6 with zero overruns/underflows, repeatable.
>  >
>  > I'll be setting up gnuradio shortly and loading the CPU down a bit and
>  > see how it works.
>  >
>  > I have the same USB 3.0 board in my windows 8.1 box (newer
>  > CPU/motherboard), and it works well, but still experiences some drops at
>  > that rate, though 16e6 is rock-solid.
>  >
>  > Hope this helps someone else get a good config set up!
>  >
>  > Cheers,
>  > Robert
>  >
>  >
>  >
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