This may also be helpful.
-Zotac ION Dual Core 1.6GHz Atom N330 Mini-ITX Board
-2x USRP2 Rev 3, 10MHz bandwidth each
-Netgear GigE Switch, the MB has only one port
-Seagate 1TB baracuda (5900 rpm I think)
-ext2 filesystem, Ubuntu 9.04
Using VRT branch code to just dump raw 16bit I&Q I was able to dump 15
cuts without problems (i didn’t test for longer).
I found though once the disk got to 30% capacity, dropouts occur,
to the write speed slowing down as the head nears the centre of the
Splitting the data from each USRP2 to seperate disks solved this
I was also able to test a few different boards, and concluded that the
chipset/driver was a notable bottleneck between boards. eg, a Dell i7
could not achieve this! I also used “bonnie++” to test disk throughput,
results of which tallied with the streaming results.
From what I remember, if the bonnie++ write result was around 100MB/s,
could sustain the 80MB/s (Going by disk test results on the web, this
line with most max rates for sata drives).
Also, I believe I also got 12.5MHz BW per channel (I’ll check if I get a
chance), but then, this is two channels, not one full 25MHz capture.
----- Original Message ----
From: Sharif S. [email protected]
To: Marcus D. Leech [email protected]
Cc: [email protected]
Sent: Sat, 9 October, 2010 2:47:53
Subject: Re: [Discuss-gnuradio] Intel Atom Processor
Thank you so much for doing this and for informing all of us of your
Helpful to us, and probably to others.
On 10/8/2010 6:21 PM, Marcus D. Leech wrote:
Once I step it up to 16.67Msps, it starts getting long sequences of
This is with the UHD “Single USRP” source, using complex-short output,
into a “file sink” with a short input, vector-length 2. From
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