Re: [PATCH 4/4] tracing, page-allocator: Add a postprocessingscript for page-allocator-related ftrace events

[Andrew Morton]

On Tue,  4 Aug 2009 19:12:26 +0100 Mel Gorman <mel@xxxxxxxxx> wrote:

> 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?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/