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On a Linux (Cent OS 5) system, I have a process that accesses a large amount of memory mapped files. The process is generating a large amount of page faults because the aggregated size of the mapped files exceeds the available RAM by far.

If I had a way of not only counting the page faults but logging the virtual address where the fault occurs, I could use /proc//maps or pmap to get an estimate of how the reads are spread out across the mapped files and how much additional RAM would be needed to improve the situation.

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Have you tried fincore from linux-ftools ? –  Panagiotis PJ Papadomitsos Nov 24 '12 at 12:52
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