OPT_U64 1368 tools/perf/builtin-kvm.c OPT_U64(0, "duration", &kvm->duration, OPT_U64 2131 tools/perf/builtin-record.c OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), OPT_U64 1427 tools/perf/builtin-top.c OPT_U64('c', "count", &opts->user_interval, "event period to sample"),