@Shay: thanks. Do you happen to have a reproducer that just involves running an lmbench subtest? I tried the following, but didn't observe a hang:
Host A: ubuntu@ubuntu:~$ /usr/lib/lmbench/bin/bw_tcp -s
Host B: ubuntu@ubuntu:~$ /usr/lib/lmbench/bin/bw_tcp -P 224 <HostA> 2048M 0.065536 82.65 MB/sec
@Shay: thanks. Do you happen to have a reproducer that just involves running an lmbench subtest? I tried the following, but didn't observe a hang:
Host A: lmbench/ bin/bw_ tcp -s
ubuntu@ubuntu:~$ /usr/lib/
Host B: lmbench/ bin/bw_ tcp -P 224 <HostA> 2048M
ubuntu@ubuntu:~$ /usr/lib/
0.065536 82.65 MB/sec