Hi Mikio,
Below are the contents of /etc/default/grub
```
# If you change this file, run 'update-grub' afterwards to update
```
```
# /boot/grub/grub.cfg.
```
```
# For full documentation of the options in this file, see:
```
```
# info -f grub -n 'Simple configuration'
```
```
GRUB_DEFAUL
Hello!
I want to get DPDK working with UHD 4.6 on our USRP X410. This might be a long
post, but I want to make sure I provide as much information as possible. Below
is a diagram of relevant network connections:
```
*-* *-*
```
```
| |
Hey Rob and Marcus,
Thanks for the responses! I have a basic understanding of linux, but am not
very experienced. I tried the following to create the RAM filesystem:
```
sudo mount -t tmpfs -o size=8G tmpfs /mnt/tmpfs/
```
```
sudo mount -t ramfs -o size=8G ramfs /mnt/ramfs/
```
And ran the rx
Hey Rob,
Saving to dev/null worked just fine, and didn’t even output the “Disk write
test indicates that an overflow is likely to occur” warning.
In terms of saving to RAM, isn’t this essentially what my custom script does? I
reserve all my buffers (which increases my RAM usage by a lot) and ha
Hello Rob!
I should have mentioned this in my original post but benchmark rate works well
for me. Specifically, when I run:
```
./benchmark_rate --rx_rate 491.52e6 --args
"addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.1.19" --duration
600
```
I get
```
[INFO] [UHD] linux; GNU
Hello!
I am having trouble using a USRP X410 to capture some high-rate data. I would
appreciate any insight or help. Below is a diagram of how our x410 is connected
to our host device.
```
*-* *-*
```
```
| | NIC QSFP Port 0 |
Actually I was running it wrong… The md.time_spec on each of my
thread/channel’s first call to rx_streamer->recv returns the same full and
fractional seconds from md.time_spec, but my method of checking against the
estimated time form the GPS signal still returns about a 700ns difference.
__
I have no clue how to explain it but .. I added just getting the timestamp from
the metadata on my first rx_streamer->recv call and magically now the
timestamps are aligned, and my aforementioned method of checking the timestamp
also agrees. This works for the rates I originally mentioned I was
It’s an estimated difference using a GPS SDR I have access to, not the
timestamps in the metadata.\
\
I just tired choosing different sampling rates, it seems like when I use pairs
of sampling rates corresponding to odd divisions of the master clock rate, it
works fine. Similarly when I choose e
If I do thing concurrently (same thread, same rx_streamer) would that solve the
timing issue? For example:
```
stream_args.channels = { 0, 1};
```
```
uhd::rx_streamer::sptr rx_stream = usrp_->get_rx_stream(stream_args);
```
```
…
```
```
size_t num_rx_samps =
```
```
rx_strea
Hello!
I am trying to do something very similar to the rx_samples_to_file example
[here](https://github.com/EttusResearch/uhd/blob/master/host/examples/rx_samples_to_file.cpp).
In this script, if multithreading is selected, then a different call to
recv_to_file spawns for each channel, which in
Hello!
I have a script in C++ that uses GNURadio for a GUI. I also already have some
scripts written using UHD’s C++ API. When prompted in the GUI, I want to call
on some of my methods that use UHD’s API. To do this, I first run "stop()" on
the usrp_source and the top block from GNURadio, then
I can verify that the QSFP ports on my host computer are both configured
properly. Before we moved to using both QSFP28 interfaces on the x410, we only
using a single one, indexed 1 on the x410, with IP 192.168.20.2. This worked
with both images, as long as I specified the addr to be that IP. On
Hello!
We have an X410 connected to a host computer through two QSFP28-to-QSFP28
connections with IPs 192.168.10.2 and 192.168.20.2 for interfaces 0 and 1
respectively. The X410 also has an ethernet connection to a router with an IP
192.168.1.19, which the host computer is also connected to.
W
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