This is the command cg_merge that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
cg_merge - merges multiple Cachegrind output files into one
cg_merge [options] [cachegrind-out-files...]
cg_merge sums together the outputs of multiple Cachegrind runs into a single output file.
Write the profile data to outfile rather than to standard output.
Use cg_merge online using onworks.net services