/usr/lib/linux-tools/3.13.0-74-lowlatency/perf is in linux-tools-3.13.0-74-lowlatency 3.13.0-74.118.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/3.13.0-74-lowlatency/../../linux-tools-3.13.0-74/perf