On Tue,  4 Aug 2009 19:12:26 +0100 Mel Gorman <mel@csn.ul.ie> wrote:

quoted text
> This patch adds a simple post-processing script for the page-allocator-related
> trace events. It can be used to give an indication of who the most
> allocator-intensive processes are and how often the zone lock was taken
> during the tracing period. Example output looks like
> 
> find-2840
>  o pages allocd            = 1877
>  o pages allocd under lock = 1817
>  o pages freed directly    = 9
>  o pcpu refills            = 1078
>  o migrate fallbacks       = 48
>    - fragmentation causing = 48
>      - severe              = 46
>      - moderate            = 2
>    - changed migratetype   = 7

The usual way of accumulating and presenting such measurements is via
/proc/vmstat.  How do we justify adding a completely new and different
way of doing something which we already do?
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