PAPI Installation and Usage

Login to one of the lab computer system via ssh/putty

Computer l-1d43-01.cse.sc.edu through l-1d43-26.cse.sc.edu, and l-3d22-01.cse.sc.edu through l-3d22-20.cse.sc.edu are available to use. Choose one randomly to reduce the chance of logining in one machine by multiple users the same time, which could overload the machine. Check Development Machines for details about login. 

ssh l-1d43-26.cse.sc.edu -p 222

Compile and Install PAPI under your home folder $HOME/papi-install (You only need to do this once.)

$ wget http://icl.utk.edu/projects/papi/downloads/papi-5.6.0.tar.gz
$ tar vxfz papi-5.6.0.tar.gz
$ cd papi-5.6.0/src
$ ./configure --prefix=$HOME/papi-install
$ make
$ make install

Download the papi_example.c file (only once)

$ cd $HOME
$ wget https://passlab.github.io/CSCE513/resources/papi_example.c

Set up the library path (You need to do this in each login session.)

$ export LD_LIBRARY_PATH=$HOME/papi-install/lib:$LD_LIBRARY_PATH

Edit the source file, compile and run (You need to compile the code each time you change the code and want to give a try)

$ gcc -I$HOME/papi-install/include -L$HOME/papi-install/lib papi_example.c -lpapi -o papi_example
$ ./papi_example 4096
INS: 1835627636, CYC: 1869833334, L1 Misses: 1, CPI: 1.220455
======================================================================================================
    AXPY: Y[N] = Y[N] + a*X[N], N=4096
------------------------------------------------------------------------------------------------------
Performance:        Runtime (ms)     MFLOPS         Error (compared to base)
------------------------------------------------------------------------------------------------------
axpy_base:      0.999928    8.192594        0