Re: [Discuss-gnuradio] Overflow error in benchmark receiver side "DDDD"

Hi Monika,
"D" is a really bad state; it indicates that the network stack or the network card had to drop network packets. It's like "O", but worse.

so, how what does

benchmark_rate --rx_rate 1e6

say?

What is your network card, what is your OS, are you using a firewall, and are you sure everything involved is 1Gbit Ethernet capable (USRPs cannot work with 100Mbit/s Ethernet, because it doesn't support the frame format).

Best regards,
Marcus

On 05.04.2016 20:12, monika bansal wrote:

Hii,

I am running benchmark code and on the receiver side after receiving some number of packets(8000 so), it starts showing overflow errors ("DDDD") on terminal.
Following is the system configuration

python benchmark_rx.py -f 1100M --args "addr=10.32.38.163" --to-file=/home/ashokbandi/GNU/a_rx.txt --bandwidth=500000

Decreasing the bandwidth delays the error.

I tried changing buffer size by setting net.core.rmem_max and net.core.wmem_max to 33445532 but to no avail.

Following is the screen shot of terminal

DDok: True      pktno: 24116      n_rcvd: 9730      n_right: 9723
DDDDDDDDok: True      pktno: 24182      n_rcvd: 9731      n_right: 9724
DDDDDDDDDDDDDDok: True      pktno: 24319      n_rcvd: 9732      n_right: 9725
DDDDDDDDDDDDDDDDok: True      pktno: 24442      n_rcvd: 9733      n_right: 9726
DDDok: True      pktno: 24477      n_rcvd: 9734      n_right: 9727
DDDDDDDDDok: True      pktno: 24568      n_rcvd: 9735      n_right: 9728
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDok: False      pktno: 22729      n_rcvd: 9736      n_right: 9728

Thanks

_______________________________________________  Discuss-gnuradio mailing list  Discuss-gnuradio@gnu.org  https://lists.gnu.org/mailman/listinfo/discuss-gnuradio