[dm-devel] dm stats

[A M, Ashalatha]

Hi,

Just want a clarification about device mapper stats:

http://lxr.free-electrons.com/source/Documentation/device-mapper/statistics.txt?v=3.14

In this documentation, would like to know what is the command to be used to create/print/list stats.

@stats_create <range> <step> [<program_id> [<aux_data>]]

@stats_print <region_id> [<starting_line> <number_of_lines>]

@stats_list [<program_id>]



Also, it is documented that 11 stats(Documentation/iostats.txt) would be reported and additional counters as well:



12. the total time spent reading in milliseconds

13. the total time spent writing in milliseconds

So are these same as "read_ticks" and "write_ticks" else how different from the ticks?

Thanks,
Asha
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