autoreconf -iv
./configure
make

make install

Usage: tcpkali [OPTIONS] <host:port> [<host:port>...]
Where OPTIONS are:
  -h, --help                  Display this help screen
  --debug <level=1>           Debug level [0..2].
  -c, --connections <N=1>     Connections to keep open to the destinations
  -r, --connect-rate <R=100>  Limit number of new connections per second
  --connect-timeout <T=1s>    Limit time spent in a connection attempt
  --channel-lifetime <T>      Shut down each connection after T seconds
  --channel-bandwidth <Bw>    Limit single connection bandwidth
  --message-first <string>    Send this message first, once
  -m, --message <string>      Message to repeatedly send to the remote
  -f, --message-file <name>   Read message to send from a file
  --message-rate <R>          Messages per second per connection to send
  -l, --listen-port <port>    Listen on the specified port
  -w, --workers <N=4>         Number of parallel threads to use
  --duration <T=10s>          Load test for the specified amount of time
  --statsd                    Enable StatsD output (default disabled)
  --statsd-host <host>        StatsD host to send data (default is localhost)
  --statsd-port <port>        StatsD port to use (default is 8125)
  --statsd-namespace <string> Metric namespace (default is "tcpkali")
And variable multipliers are:
  <R>:  k (1000, as in "5k" is 5000)
  <Bw>: kbps, Mbps (bits per second), kBps, MBps (bytes per second)
  <T>:  ms, s, m, h (milliseconds, seconds, minutes, hours)

kern.maxfiles=10000+2*N         # BSD
kern.maxfilesperproc=100+N      # BSD
fs.file-max=10000+2*N           # Linux

# For load-generating clients.
net.ipv4.ip_local_port_range="10000  65535"  # Linux.
net.inet.ip.portrange.hifirst=10000          # BSD/Mac.
net.inet.ip.portrange.hilast=65535           # (Enough for N < 55535)
net.ipv4.tcp_tw_reuse=1

# If using netfilter on Linux:
net.netfilter.nf_conntrack_max=N
net.netfilter.nf_conntrack_max=N/4