I am monitoring disk I/O usages of an application program (running on CentOS 7)It uses lots of sequential disk I/Os where I expect that OS prefetching is something!dstat shows how many disk I/Os are occurring in terms of bytes / sec. It, however, does not differentiate those two.
How can I differentiate disk I/O occured explicitly by a user and OS prefetching?
linux;io;disk