caliper top-down modifier

[rfhaque]

No description provided.

[pearce8]

@rfhaque Can you please test on all x86 machines on-site we have defined in benchpark?

[rfhaque]

@pearce8 Tested on quartz and pascal

[slabasan]

@rfhaque Can you include here how you turn on this caliper modifier? I just have --modifier=caliper, but will we need more specifics to select between top-down, cuda, etc?

[pearce8]

We need to impose a constraint on the spack spec as this should only be used on Intel's x86. If a user tries to use this modifier on a different architecture, we should make sure they get an error indicating that the modifier does not work on this architecture. Doug provided this example: https://github.com/GoogleCloudPlatform/ramble/blob/develop/lib/ramble/ramble/language/modifier_language.py#L285

[rfhaque]

in benchpark setup, we specify --modifier=caliper-topdown