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 minute
cuts without problems (i didn't test for longer).
I found though once the disk got to 30% capacity, dropouts occur, probably due
to the write speed slowing down as the head nears the centre of the disk.
Splitting the data from each USRP2 to seperate disks solved this problem.
I was also able to test a few different boards, and concluded that the disk
chipset/driver was a notable bottleneck between boards. eg, a Dell i7 based PC
could not achieve this! I also used "bonnie++" to test disk throughput, the
results of which tallied with the streaming results.
From what I remember, if the bonnie++ write result was around 100MB/s, then you
could sustain the 80MB/s (Going by disk test results on the web, this seemed in
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.
Dave.
----- Original Message ----
From: Sharif Shaher<address@hidden>
To: Marcus D. Leech<address@hidden>
Cc: address@hidden
Sent: Sat, 9 October, 2010 2:47:53
Subject: Re: [Discuss-gnuradio] Intel Atom Processor
Hi Marcus,
Thank you so much for doing this and for informing all of us of your
results.
Helpful to us, and probably to others.
On 10/8/2010 6:21 PM, Marcus D. Leech wrote:
On 10/08/2010 04:44 PM, Sharif Shaher wrote:
Hi Marcus,
That would be great, and greatly appreciated, we are just not sure
is if there is a fighting chance or not...thus the question to the forum.
Thanks so much,
Sharif
On my dual-core Atom D-510 at 1.67GHz, with 4GB of memory, and an Intel
80GB SSD, I can run at 12.5Msps without a problem.
Once I step it up to 16.67Msps, it starts getting long sequences of
overruns "O".
This is with the UHD "Single USRP" source, using complex-short output,
into a "file sink" with a short input, vector-length 2. From
a USRP2.
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