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Re: [Discuss-gnuradio] Packet drop from Ethernet (A BIG PROBLEM)

From: Nikos Balkanas
Subject: Re: [Discuss-gnuradio] Packet drop from Ethernet (A BIG PROBLEM)
Date: Wed, 9 Mar 2016 09:55:50 +0200


This issue is better addressed to address@hidden. Briefly I can tell you that you can never reach 30M samples/sec over a 1 GbE interface.
30 x 32/bits/sample = 960. Need a bit for metadata, packet overheads, etc. you will drop packages. Especially if your NIC is PCI based :(
Try reducing your sample resolution to 8 bits. You may have better luck.


On Wed, Mar 9, 2016 at 9:42 AM, Mostafa Alizadeh <address@hidden> wrote:

Hello all,
I stuck on an incridible challenge in sending/receiving a large bandwidth. I have an USRP N210 and an WBX daughterboard, while I must be able to capture/transfer up to 30Msample/sec(1Gig ethernet limit ), with the sample rate of 25Msps or even 20Msps I have some dropped packets. Based on my knowledge, this is due to CPU which does not have enough time to capture from Ethernet, however, I have the powerful one, 12 core CPU. When I have a large GNURadio program to run, there are some dropped packets. I searched everywhere but I did not find a complete description of the solution. What is (are ) the solution(s )? Please help me with any information! :(

Best regards

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