Re: [Qemu-devel] [PATCH 0/2] RFC: Rolling statistics

[Markus Armbruster]

Copying qemu-block, because it could be of interest for block I/O
accounting.

"Dr. David Alan Gilbert (git)" <address@hidden> writes:

> From: "Dr. David Alan Gilbert" <address@hidden>
>
> Hi,
>   This is an attempt at a generic rolling statistics utility to
> allow data (e.g. bandwidth usage, times etc) to be collected
> easily.  They hold some basic values (min/max/mean/weighted mean)
> and the last 'n' raw values.    I'd like to use this
> maybe in fault-tolerance code.
>
>   This is a first cut, and I think I probably need to rework it
> as a qapi type somehow, but I'm interested in thoughts.
>
> Dave
>
>
> Dr. David Alan Gilbert (2):
>   Rolling statistics utilities
>   Tests for rolling statistics code
>
>  include/qemu/rolling-stats.h | 101 +++++++++++
>  include/qemu/typedefs.h      |   1 +
>  tests/Makefile               |   3 +
>  tests/test-rolling-stats.c   | 161 ++++++++++++++++++
>  util/Makefile.objs           |   1 +
>  util/rolling-stats.c         | 393 
> +++++++++++++++++++++++++++++++++++++++++++
>  6 files changed, 660 insertions(+)
>  create mode 100644 include/qemu/rolling-stats.h
>  create mode 100644 tests/test-rolling-stats.c
>  create mode 100644 util/rolling-stats.c