Adding Microbenchmarks to the JDK forest/trees (JEP-230)

[David Holmes]

Hi Staffan,

On 2/12/2014 10:08 AM, Staffan Friberg wrote:
> Hi,
>
> Hopefully this is the right list for this discussion.
>
> As part of adding Microbenchmarks to the OpenJDK source tree, I'm trying
> to understand how we best would add the benchmark sources to the
> existing OpenJDK tree structure.

Is there a reason this needs to be inside the OpenJDK instead of a 
stand-alone project? If it ends up in its own repo and the repo is not 
needed by anything else, then it is already like a stand-alone project.

David

> Since the microbenchmark suite will cover all parts of the JDK, covering
> HotSpot, JDK libraries and Nashorn, it would be preferred to add the
> microbenchmark directory as a new top level directory. Something similar
> to the following structure. Having "benchmark" as the top-level
> directory would allow us to later add different types of benchmarks
> without colliding with the microbenchmark suite.
>
> <openjdk-root>/
>     benchmark/microbenchmark/...
>     hotspot/...
>     jdk/...
>     nashorn/...
>
> With this as the premise I can see the following 3 options for how this
> could be added to the source code layout
>
> 1. Part of jdk-root repository
>       * Only makes sense if we want to move in a direction with fewer
>         trees (and eventually a single tree)
> 2. Part of another already existing tree
>       * Not sure if this is possible without converting and moving the
>         directory to a subdirectory of that tree
> 3. New tree in the forest/tree structure
>       * Most logical option as it follows the current setup and structure
>
>
> Anyone have any comments and/or concerns on the suggested directory
> location and the tree structure in option 3.
>
> Would the build-dev team be the right group to later help setup a new
> tree if decided to be the right way to go?
>
> Regards,
> Staffan
>