[OE-core] [PATCH 1/1] bb-matrix-plot: Use interpolation for sparse data

[Darren Hart]

On Tue, 2013-09-10 at 14:20 +0200, Peter Kjellerstedt wrote:
> If not every combination of BB_NUMBER_THREADS and PARALLEL_MAKE have
> been tested by bb-matrix.sh, e.g., by using BB_RANGE="04 08 10 12 16"
> and PM_RANGE="04 08 10 12 16", then the graph that gnuplot generates by
> default looks very jagged due to the missing data points. By using
> splines to interpolate the missing data the graph looks a lot better.
> 
> This should not change graphs where all data points are available in any
> way, only improve sparse graphs.
> 
> Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt at axis.com>
> ---
>  scripts/contrib/bb-perf/bb-matrix-plot.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/contrib/bb-perf/bb-matrix-plot.sh b/scripts/contrib/bb-perf/bb-matrix-plot.sh
> index 87e8cb1..136a255 100755
> --- a/scripts/contrib/bb-perf/bb-matrix-plot.sh
> +++ b/scripts/contrib/bb-perf/bb-matrix-plot.sh
> @@ -115,7 +115,7 @@ set xlabel "$XLABEL"
>  set ylabel "$YLABEL"
>  set style line 100 lt 5 lw 1.5
>  $PM3D_FRAGMENT
> -set dgrid3d $PM_CNT,$BB_CNT
> +set dgrid3d $PM_CNT,$BB_CNT splines


Saweet! I just couldn't figure that one out for some reason. Thank you,
thank you, thank you!

Please note the gnuplot 4.4 dependency in the patch commit message
though. Also, what happens if an older gnuplot is used? Does it fail or
revert to the old behavior? If it fails, can we check for 4.4 and use
splines if available?

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel