If you want to do performance engineering on computational code, particularly parallel, go to vi-hps.org or the sites for other toolsets like openspeedshop and

If you want to do performance engineering on computational code, particularly parallel, go to vi-hps.org or the sites for other toolsets like openspeedshop and hpctoolkit; also tools.bsc.es if vi-hps doesn't cover them -- I can't remember.