Added initial Solaris support to Benchee.System

[brianewell]

Associated PR for issue: #421
Added calls as appropriate to kstat and prtconf to produce intended results.

This was specifically tested on SmartOS base-64-trunk 20231113

[PragTob]

Thank you very much for the PR! Looking good! 💚

Only 2 small comments, but one is a bit "tougher" as we can't rely on Jason.

[PragTob]

Adding a test may be neat, that's the reason that function is public :) It's also nice for me to have an example of the output: https://github.com/bencheeorg/benchee/blob/main/test/benchee/system_test.exs#L49

[brianewell]

Illumos kstat can be flagged to output data in json format:

$ kstat -j cpu_info:0::brand
[{
        "module": "cpu_info",
        "instance": 0,
        "name": "cpu_info0",
        "class": "misc",
        "type": 1,
        "snaptime": 3916379.363662097,
        "data": {
                "brand": "Intel(r) Xeon(r) CPU E5-2678 v3 @ 2.50GHz"
        }
}]

More universally, the -p (parsable) flag can be used to reduce the output to key value pairs:

$ kstat -p cpu_info:0:cpu_info0:brand
cpu_info:0:cpu_info0:brand      Intel(r) Xeon(r) CPU E5-2678 v3 @ 2.50GHz

This second command is effective across pretty much every variant of Solaris.

[PragTob]

This works by accident. Benchee does not depend on Jason and should not depend on it. It's available in the dev and test environments due to dev/test dependencies:

tobi@qiqi:~/github/benchee(main)$ mix deps.tree
benchee
├── credo ~> 1.7.2-rc.0 (Hex package)
│   ├── bunt ~> 0.2.1 or ~> 1.0 (Hex package)
│   ├── file_system ~> 0.2 or ~> 1.0 (Hex package)
│   └── jason ~> 1.0 (Hex package)
├── deep_merge ~> 1.0 (Hex package)
├── dialyxir ~> 1.0 (Hex package)
│   └── erlex >= 0.2.6 (Hex package)
├── ex_doc >= 0.0.0 (Hex package)
│   ├── earmark_parser ~> 1.4.39 (Hex package)
│   ├── makeup_elixir ~> 0.14 (Hex package)
│   │   ├── makeup ~> 1.0 (Hex package)
│   │   │   └── nimble_parsec ~> 1.2.2 or ~> 1.3 (Hex package)
│   │   └── nimble_parsec ~> 1.2.3 or ~> 1.3 (Hex package)
│   └── makeup_erlang ~> 0.1 (Hex package)
│       └── makeup ~> 1.0 (Hex package)
├── ex_guard ~> 1.3 (Hex package)
│   └── fs ~> 8.6.1 (Hex package)
├── excoveralls ~> 0.13 (Hex package)
│   └── jason ~> 1.0 (Hex package)
├── statistex ~> 1.0 (Hex package)
└── table ~> 0.1.0 (Hex package)

so, we need make do here without Jason :)

[PragTob]

Ah one more @brianewell - you don't seem to have run the elixir formatter. Run mix format - also double check if mix credo passes :) The CI runs a whole bunch of things 😁

[PragTob]

Looking great, thanks a lot! 💚