Pass Benchpark and Ramble variables to Caliper

[pearce8]

• Variables @dyokelson
• Type of study (strong scaling, weak scaling) @dyokelson
• Process binding; we should use https://github.com/bcumming/affinity @daboehme, can this be used inside Caliper?
• Caliper needs to take in a json file - interface? @daboehme

[daboehme]

Hi @dyokelson, I've added some new capabilities in Caliper to import run metadata through the Caliper config strings. This is in the current Caliper master branch. You can pass in metadata key-value pairs directly like so:

CALI_CONFIG="spot,metadata(foo=fooval,bar=barval)"

Alternatively you can read it from json file:

CALI_CONFIG="spot,metadata(file=data.json)"

The file should be a json dictionary:

{ "foo": "fooval", "bar": "barval" }

It allows for more complex cases too, e.g. you can have nested dictionaries and specify individual keys you want to read instead of reading the whole file. You can also combine the two options or read multiple files by adding more metadata(...) entries. Let me know if you want to learn more.