$ sockperf ping-pong -i 10.11.11.2 --time 30 --port 11112 --udp

STDOUT
ping-pong (pp): Run sockperf client for latency test in ping pong mode.

Usage: sockperf ping-pong [options] [args]...
 sockperf ping-pong -i ip  [-p port] [-m message_size] [-t time]
 sockperf ping-pong -f file [-F s/p/e] [-m message_size] [-r msg_size_range] [-t time]

Options:
 -h,-?   --help,--usage       	-Show the help message and exit.
         --tcp                	-Use TCP protocol (default UDP).
 -i      --ip                 	-Listen on/send to ip <ip>.
 -p      --port               	-Listen on/connect to port <port> (default 11111).
 -f      --file               	-Read list of connections from file (used in pair with -F option).
 -F      --iomux-type         	-Type of multiple file descriptors handle [s|select|p|poll|e|epoll|r|recvfrom|x|socketxtreme](default epoll).
         --timeout            	-Set select/poll/epoll timeout to <msec>, -1 for infinite (default is 10 msec).
 -a      --activity           	-Measure activity by printing a '.' for the last <N> messages processed.
 -A      --Activity           	-Measure activity by printing the duration for last <N>  messages processed.
         --tcp-avoid-nodelay  	-Stop/Start delivering TCP Messages Immediately (Enable/Disable Nagel). Default is Nagel Disabled except in Throughput where the default is Nagel enabled.
         --tcp-skip-blocking-send
                              	-Enables non-blocking send operation (default OFF).
         --tos                	-Allows setting tos
         --mc-rx-if           	-Set address <ip> of interface on which to receive mulitcast messages (can be other then route table).
         --mc-tx-if           	-Set address <ip> of interface on which to transmit mulitcast messages (can be other then route table).
         --mc-loopback-enable 	-Enables mc loopback (default disabled).
         --mc-ttl             	-Limit the lifetime of the message (default 2).
         --mc-source-filter   	-Set address <ip, hostname> of mulitcast messages source which is allowed to receive from.
         --uc-reuseaddr       	-Enables unicast reuse address (default disabled).
         --lls                	-Turn on LLS via socket option (value = usec to poll).
         --buffer-size        	-Set total socket receive/send buffer <size> in bytes (system defined by default).
         --nonblocked         	-Open non-blocked sockets.
         --recv_looping_num   	-Set sockperf to loop over recvfrom() until EAGAIN or <N> good received packets, -1 for infinite, must be used with --nonblocked (default 1). 
         --dontwarmup         	-Don't send warm up messages on start.
         --pre-warmup-wait    	-Time to wait before sending warm up messages (seconds).
         --vmazcopyread       	-Use VMA's zero copy reads API (See VMA's readme).
         --daemonize          	-Run as daemon.
         --no-rdtsc           	-Don't use register when taking time; instead use monotonic clock.
         --load-vma           	-Load VMA dynamically even when LD_PRELOAD was not used.
         --rate-limit         	-use rate limit (packet-pacing), with VMA must be run with VMA_RING_ALLOCATION_LOGIC_TX mode.
         --set-sock-accl      	-Set socket accleration before run (available for some of Mellanox systems)
 -d      --debug              	-Print extra debug information.

Valid arguments:
         --srv-num            	-Set num of servers the client works with to N.
         --sender-affinity    	-Set sender thread affinity to the given core ids in list format (see: cat /proc/cpuinfo).
         --receiver-affinity  	-Set receiver thread affinity to the given core ids in list format (see: cat /proc/cpuinfo).
         --full-log           	-Dump full log of all messages send/receive time to the given file in CSV format.
         --full-rtt           	-Show results in round-trip-time instead of latency.
         --giga-size          	-Print sizes in GigaByte.
         --increase_output_precision
                              	-Increase number of digits after decimal point of the throughput output (from 3 to 9). 
         --dummy-send         	-Use VMA's dummy send API instead of busy wait, must be higher than regular msg rate. 
				 optional: set dummy-send rate per second (default 10,000), usage: --dummy-send [<rate>|max]
 -t      --time               	-Run for <sec> seconds (default 1, max = 36000000).
         --client_port        	-Force the client side to bind to a specific port (default = 0). 
         --client_ip          	-Force the client side to bind to a specific ip address (default = 0). 
 -b      --burst              	-Control the client's number of a messages sent in every burst.
         --mps                	-Set number of messages-per-second (default = 10000 - for under-load mode, or max - for ping-pong and throughput modes; for maximum use --mps=max; 
				 support --pps for old compatibility).
 -m      --msg-size           	-Use messages of size <size> bytes (minimum default 14).
 -r      --range              	-comes with -m <size>, randomly change the messages size in range: <size> +- <N>.
         --data-integrity     	-Perform data integrity test.


STDERR