[lttng-dev] show the ratio of reads from page cache vs reads from disk, for a user space file read of a C program

[MMM]

Dear Users,
I am beginner in LTTng. I am going to trace a C program and show the ratio of reads from page cache vs reads from disk, for a user space file read using Trace Compass. While I can not write appropriate commands in trace_point_provider.h and in the C program. Could you please guide me or introduce a sufficient and simple reference to help me do it.
Best regards,Mehdi.
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