Googling suggests that DTrace is available on Linux but I can't find instructions as how to install it.

DTrace is a comprehensive dynamic tracing framework. It is designed to give operational insights that allow users to tune and troubleshoot applications and the OS itself. Special consideration has been taken to make it safe to use in a production environment. For example, there is minimal probe effect when tracing is underway, and no performance impact associated with any disabled probe; this is important since there are tens of thousands of DTrace probes that can be enabled.