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Re: GRC max sample rate


From: Koyel Das (Vehere)
Subject: Re: GRC max sample rate
Date: Wed, 2 Sep 2020 18:31:22 +0000

Hi Kyeong,

Though you said you don’t remember anything other than what you wrote but still asking do you remember the ram size? Was it more than 16 GB? It’s okay if you don’t remember also.

Regards,
Koyel 



From: Kyeong Su Shin <ksshin@postech.ac.kr>
Sent: Sunday, July 26, 2020 2:13 PM
To: Koyel Das (Vehere); GNURadio Discussion List
Subject: Re: GRC max sample rate
 
Hello Koyel:

I used a generic Intel i5 PC, with a Mellanox 10Gbps NIC. I do not remember the exact model numbers, but I am pretty sure that the cpu was a relatively older generation on (DDR3-era).

I just created a tmpfs and used uhd_rx_cfile.py (a sample application included in gr-uhd) to collect the data. I do not remember further details.

Regards,
Kyeong Su Shin

보낸 사람: Koyel Das (Vehere) <koyel.das@vehere.com>
보낸 날짜: 2020년 7월 26일 일요일 오후 3:10
받는 사람: Kyeong Su Shin <ksshin@postech.ac.kr>; GNURadio Discussion List <discuss-gnuradio@gnu.org>
제목: Re: GRC max sample rate
 
Hi Kyeong,

Since you have received at 200 MSPS data from usrp, I am asking this to you. What were your system parameters to receive at 200 MSPS like clock speed of processor, did you have DDR4 ram with ssd? And 10 gbps nic card? What clock speed of processor is needed? And what other things are needed?

I am asking this to compare with the parameters told to me by one of my friends. Since you have handled this data rate yourself you will be able to tell exactly.

So please help.

Regards,
Koyel 


From: Kyeong Su Shin <ksshin@postech.ac.kr>
Sent: Friday, July 24, 2020 3:32:33 PM
To: Koyel Das (Vehere) <koyel.das@vehere.com>; GNURadio Discussion List <discuss-gnuradio@gnu.org>
Subject: Re: GRC max sample rate
 
Hello Koyel:

I did one channel with 200 MSPS before, so probably yes (assuming that you are not doing any other processing).

Consider using sc16. Also, you can try using libuhd directly.

Regards,
Kyeong Su Shin

보낸 사람: Koyel Das (Vehere) <koyel.das@vehere.com> 대신 Discuss-gnuradio <discuss-gnuradio-bounces+ksshin=postech.ac.kr@gnu.org>
보낸 날짜: 2020년 7월 24일 금요일 오후 5:59
받는 사람: GNURadio Discussion List <discuss-gnuradio@gnu.org>
제목: GRC max sample rate
 
Can GRC handle writing data from two channels of USRP at 100 MSPS each to a file in a RAM disk ? I am using 10G server and PCIe cable.


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