Re: [casper] 10 GBE Network Slowdown with Ubuntu 18.04

2018-10-03 Thread Dale Gary
Hi Dave, When you say multi-socket, do you mean multi-processor? There are two 16 core AMD Opteron processors. We are using taskset, and have tried every permutation we could think of. I’ll check out the script. Thanks, Dale Sent from my iPhone > On Oct 3, 2018, at 9:39 PM, David

Re: [casper] 10 GBE Network Slowdown with Ubuntu 18.04

2018-10-03 Thread David MacMahon
HI, Dale, Is this a multi-socket system? If so, are you using "numactl" or "taskset" to bind the packet reading processes to CPU(s) on the same socket that the NIC is connected to? Are you sure you are sending the NIC interrupts to CPU(s) on the socket that the NIC is connected to? FWIW,

Re: [casper] 10 GBE Network Slowdown with Ubuntu 18.04

2018-10-03 Thread Gary, Dale E.
Hi All, I thought I would send an update to this problem, which still persists. Jonathan's suggestion did not seem to work, since each ethernet interface does not send packets to multiple processors. If I specify two cpus in the SMP_AFFINITY files, the board sends to only one of them. Also, I

Re: [casper] 10 GBE Network Slowdown with Ubuntu 18.04

2018-10-03 Thread Jean Borsenberger
    First sorry for the delay, I was off for a time. We do not use UBUNTU, but DEBIAN, but the two distribs are in fact two flavours ofthe same thing. We manage on each machine an UDP download link from a ROACH2. ROACH2 does nothing but adding an 8byte counter to each 8K data block. That way