How to measure disk and network IO more frequently than a second?

I am running some experiments that use cpu, disk, and network resources. (by the way, I use Cent OS 7) I want to measure its cpu, disk, and network resource usage. Some tools I know (dstat, iostat) only provides a second as the minimum interval between two measurements. How can I take several measurements even within a second? I googled a lot but couldn't find one. Thanks