[linux-lvm] LVM Statistics

[John]

hello everyone:

  Is there anyone know about LVM IO statistics, kind of want to trace IO
statistics but from the output lvdisplay -v only shows the frequency of read
and write activities to extend, rather than the actual number of bytes that
been written and read. Any clue that I can get those figure? thanks for
suggestion before i dig into the LVM source code. thanks