Demonstrations of syncsnoop, the Linux eBPF/bcc version.
This program traces calls to the kernel sync() routine, with basic timestamps:
# ./syncsnoop
TIME(s) CALL
16458148.611952 sync()
16458151.533709 sync()
^C
While tracing, the "sync" command was executed in another server session.
This can be useful to identify that sync() is being called, and its frequency.