I'm new in Perl and what I would like to do ,for a given pid,is to parse from all virtual addresses to physical ones and the related information about PTE soft-dirty bit at each time interval . So what I would like to get ,by supposing an overall duration of 1 second and an observation time of 0.1 s(Thus I should get an array/list of 10 elements zero or one) is a data structure like this:

#PageNumberKey           Soft_dirty-bit
[pageframenumber#1]-> [0 1 0 0 1 1 0 0 1 1]
[pageframenumber#2]-> [0 0 0 1 1 0 0 0 0 0]
[pageframenumber#3]-> [0 0 0 0 0 1 0 0 1 0]
[pageframenumber#4]-> [1 1 0 0 1 1 1 0 0 1]
[pageframenumber#5]-> [1 1 0 0 0 0 0 0 1 1]
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I'm thinking something like each hash key is linked to a list of values(array), but before that I need to parse the binary file proc/pid/pagemap in linux and then getting the above structure. I read something around ,but I got stuck at the moment. The structure of that file can be found at https://www.kernel.org/doc/Documentation/vm/pagemap.txt . I read something around ,but I got stuck at the moment. Thanks for reading.Any help/solution is very appreciated . PS: I also asked for help at stackoverflow so that I might have more chance to get an answer!