Iperf

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Iperf

About

iperf is a open source tool that can be used for measuring network performance . Supports -

Measuring of maximum TCP and UDP bandwidth performance.
Tuning of various network related parameters and UDP characteristics.
Reporting of bandwidth, delay jitter, datagram loss.
Supports bandwidth measurements with bidirectional traffic
Transmit time duration of TCP/UDP traffic.

Visit iperf website for more information.

Source Download Location

Visit Sourceforge link

Cross compiling

Step 1: Modify the src/Client.cpp file to add delay_loop()

void delay_loop( unsigned long usec ) {
Timestamp end;
end.add( usec * 1e-6 );
Timestamp now;
while ( now.before( end ) ) {
now.setnow();
}
}

Step 2: Configure for cross compilation. ./configure --host=arm-linux --prefix=$HOME/install CC=$(TOOL_CHAIN_PREFIX)-gcc CXX=$(TOOL_CHAIN_PREFIX)-g++ LDFLAGS=-L(Path of lib folder of filesystem).

 The TOOL_CHAIN_PREFIX corresponds to the tool chain in use. Set this based on your tool chain. Also make path to toolchain is exported as part of $PATH.

You may use options "CFLAGS=-static CXXFLAGS=-static" to the configure line if you want to build a static version. Note it will be about 10 times the size.

Step 3: Compile the source code

       make install OR make

Test setup

Boot the EVM with ramdisk.
Connect 2 EVMs back to back with an ethernet cable.
On 1 EVM, run iperf in server mode(-s option) and on another EVM run iperf in client mode(-c option).