118 void usage(std::ostream& ostr, const std::string& program_name) {  in usage()  argument
121     ostr << "Usage: " << program_name << " [global_options] {[workload_options] -w WORKLOAD_T}\n";  in usage()
122     ostr << "WORKLOAD_T = {" << Command::CREATE << ", " << Command::DELETE << ", " << Command::MOVE  in usage()
124     ostr << "Global options\n";  in usage()
125     ostr << "\t-v: Print version.\n";  in usage()
126     ostr << "\t-p: Print parsed workloads and exit.\n";  in usage()
127     ostr << "Workload options\n";  in usage()
128     ostr << "\t-d DIR\t\t: Work directory for " << Command::CREATE << "/" << Command::DELETE  in usage()
130     ostr << "\t-f FROM-DIR\t: Source directory for " << Command::MOVE << "/" << Command::SYMLINK  in usage()
132     ostr << "\t-t TO-DIR\t: Destination directory for " << Command::MOVE << "/" << Command::SYMLINK  in usage()
134     ostr << "\t-n N_FILES\t: Number of files to create/delete etc. (default " << command.n_file  in usage()
136     ostr << "\t-s\t\t: Do not drop state (caches) before running the workload (default "  in usage()
138     ostr << "NOTE: -w WORKLOAD_T defines a new command and must come after its workload_options."  in usage()