Usage:

        ./run [case-XXX]

It will try to collect /proc/lock_stat, /debug/gcov and perf stats,
if the kernel features are enabled:

        CONFIG_LOCK_STAT=y

        CONFIG_GCOV_KERNEL=y
        CONFIG_GCOV_PROFILE_ALL=y

        CONFIG_PERF_EVENTS=y
        CONFIG_FTRACE_SYSCALLS=y

and the perf tool is installed.

The collected data will be saved to directory $(hostname)-*/case-*.

$(hostname)-*/elapsed-time will be auto updated by ./run.

$(hostname)-*/{mm,top-locks,top-functions} can be manually updated
by running ./gcov-sum-all.