Re: [Discuss-gnuradio] Underflow and Overflow

[Yeo Jin Kuang Alvin (IA)]

Noted thank you everyone.
________________________________________
From: Neel Pandeya address@hidden
Sent: 30 May 2018 07:52
To: Yeo Jin Kuang Alvin (IA)
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Underflow and Overflow

Hello Alvin:

I will emphasize what Derek Kozel and Marcus Mueller have said.

Again, I would recommend that you use a current-generation NVMe SSD from Intel 
or Samsung (they're not too expensive), and you will need to test whether it 
can sustain the read and write speeds that your flowgraph requires. In general, 
I would assume that a Samsung 960 would be capable of sustaining reading and 
writing at 20 Msps.

https://arstechnica.com/gadgets/2016/09/samsung-ssd-960-pro-evo-price-specs-release-date/

https://arstechnica.com/gadgets/2018/04/samsung-announces-970-pro-and-evo-nvme-ssds/

--​Neel Pandeya




On 28 May 2018 at 07:18, Müller, Marcus (CEL) 
<address@hidden<mailto:address@hidden>> wrote:
Hi Alvin,

you've already gotten plenty of info on this list from where over- and
underflows come.
We've really addressed all this before[1,2,3,4,5,6,7,8,9,10,11,12,etc],
and you've gotten sufficient recommendations. Please do avoid to spam
the mailing list with redundant questions.
Let me quickly give you a bit of perspective on this: If we consider
just the time spent to read your emails and write a quick answer, if
GNU Radio's community was a company, you will have amassed some work
cost of upwards of 1000 $. I'm very happy to say we're not a company,
but a community project, so that we can freely choose how to use our
time, help each other, and work on software. You are, however, becoming
a bit of a drain of time, so please consider condensing your questions
a bit more, making sure that everything you've been told has already
been taken into consideration, so that we can focus on giving good
answers – that, in the end, is in your own best interest, because you
risk getting ignored if you keep this up.

Best regards,
Marcus

[1] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0022
5.html
[2] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0023
0.html
[3] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0023
1.html
[4] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0024
2.html
[5] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0024
6.html
[6] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0028
8.html
[7] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0020
7.html
[8] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0020
9.html
[9] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg0021
2.html
[10] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg002
18.html
[11] https://lists.gnu.org/archive/html/discuss-gnuradio/2018-05/msg002
10.html
[12] …

On Tue, 2018-05-22 at 09:38 +0000, Yeo Jin Kuang Alvin (IA) wrote:
> Hi all,
>
> May I know what causes my flowgraph to have so many U’s and O’s, is there any 
> block that causes this? I am trying to hit a higher sampling rate possibly 20 
> MHz or higher. I have searched online and some suggest switching to a 
> different OS and I did switch from windows to Ubuntu, only a slight 
> difference. Some say is the computer’s processing speed not fast enough, 
> thus, changing a better one will help. Others did mentioned that the 
> flowgraph connection might cause this problem.
>
> I am getting “OOOUOO” when transmit a sine wave sampling at 20 MHz and 
> receive to a file sink.
>
> I am using USRP B210, running on a Intel Core i7-4700MQ CPU @ 2.40 GHz x 8, 
> 64 bit computer.
>
> Any help would be appreciated!
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden<mailto:address@hidden>
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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