:)
Thank you all for this small debate.
Our sampling rates are in the hundreds of MHz but we have many many
dual-polarised antennas, so we will rather go with the pragmatic solution
to be on the safe side. All the processing nodes are little-endian and the
final products that we might be sharing wi
Is it April already? :) :) :)
> On Aug 18, 2020, at 10:43, Jack Hickish wrote:
>
> There is, of course, always the compromise option of using half
> network-endianness and half little-endianness. For example, all positive
> numbers could be encoded with big-endian and negative numbers could be
There is, of course, always the compromise option of using half
network-endianness and half little-endianness. For example, all positive
numbers could be encoded with big-endian and negative numbers could be
encoded little-endian. This would incur a similar overhead on both little-
and big-endian C
Hi Dave,
Yes of course! Though it makes little sense IMO to do the conversion on the
host CPU, as GPUs are pretty well-equipped to do this operation pretty
quickly if the need arises.
In some cases being pragmatic is important - if your instrument is small,
for example, and you don't have any use
It may be of interest to someone in the future that, if you buy a Dell
workstation with RHEL pre-installed, these solutions don’t work. Indeed this is
what I originally tried to do. The problem appears to be that Dell have
installed some sort of BIOS command to overrule any changes you make to t
I guess I’m going to play angels’s advocate and suggest the pragmatic over the
dogmatic. :)
Some standards mandate network byte order, aka big endian, but if you’re not
constrained in that way and you know that the data will be processed downstream
by a little-endian system for the foreseeable
The consistent albeit cryptic names like “enp0s5” might make life easier for
automating Linux installations, but I don’t think they make life easier for
sysadmins or power users. Fortunately, this naming scheme is optional and it’s
easy to switch to the more human-friendly names by adding “net.i
Hello Nitish,
So I'm going to play devil's advocate and say that while you could do the
byte swapping in the FPGA, it would be morally wrong ;-)
Ideally, all data that goes out on a network will be network order, and you
use the ntohl or htohs functions to get it in host format. That way the
code
Hi,
Thanks a lot Jack. It makes sense.
And thank you very much for the note on the 2x32-bit pair. It is exactly
how our data is formatted.
Ok, we will go with an FPGA correction instead of a CPU byteswap. I am
guessing it will be faster this way.
Thanks again.
Cheers
Nitish
On Tue, Aug 18, 2020
Hi Nitish,
To try and answer your first question without adding confusion --
If you send a UFix64_0 value into the 10GbE block, you will need to
interpret it on the other end via an appropriate 64-bit byte swap if your
CPU is little-endian.
If you send a 64-bit input into the 10GbE block where th
Hello,
We are setting up the digital back-end of a low-frequency telescope
consisting of SNAP boards and GPUs. The SNAP boards packetize the data and
send to the GPU processing nodes via 10 GbE links. We are currently
programming the packetizer/depacketizer.
I have a few questions about the 10gbe
Hi Heystek,
Not sure what the linux flavour dependencies are, but this is quick and
easy and works for (eg) making MATLAB 2016 work with Ubuntu 2018 --
https://blog.leiy.me/post/create-dummy-network-interfaces-on-linux
Cheers
Jack
On Tue, 18 Aug 2020 at 12:00, James Smith wrote:
> Hi Heystek,
Hi Heystek,
Unfortunately not - I have had this in the past as well IIRC, some of the
more modern Linux distributions will give you something like "en0s1" or the
like. Matlab is stuck in the past, looking for eth0.
It's easy enough to change the name, but bear in mind that you may have
some funni
Hey Mike
Thank you for your reply!
On the Mathworks forums some of the folks suggest to “force” a name change.
Apparently the license is looking for “eth0” but on my machine it is “em1”.
That is what is. causing the error.
I was just wondering if there is perhaps a more elegant solution to
Hi Heystek,
I’ve seen a similar thing recently installing ISE on a Linux 7 machine. It
looks like a complaint about the naming convention of your primary NIC. You can
force a name-change if you want using the network manager (I did it in RHEL,
unsure about Ubuntu) but better to find a solution
Hello everyone
I have a bit of a problem. The first time that I am experiencing it. I am
trying to install Matlab 2012B on a Ubuntu machine (That I redid), but the
installation gives this error:
[image: Screenshot from 2020-08-17 17-55-44.png]
Does anyone perhaps know how to fix this?
Heystek
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