I am new to asynchronous I/O. I am trying to get it to work in C and Fortran codes on a Linux system. Based on what I can find out about the platform's somewhat outdated Lustre file system, the various aio routines are supported, after a fashion, but it is not clear that they can execute in true asynchronous fashion. Is there some simple code to test whether true asynchronous I/O is occurring in the execution of a code?
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