Sched_ext Schedulers and Tools (with MIDI support!)

WHAT IS THIS?!

This is a fork of the sched_ext scheduler repo with experimental support for MIDI. The idea is to be able to interact with schedulers via MIDI to observer and adjust the runtime properties of a scheduler. To interface with MIDI the scheudlers use the midir crate.

Device Support

I don't have a lot of MIDI devices, so I picked up a APC Key 25 for ~$100 USD. I chose this device because the MIDI interface was rather well documented and it had decent reviews. I'm by no means a DJ or music maker so everything is just for fun. The device has a nice RBG LED pad and 360 rotary encoders. I plan on adding support for tuning scheduling domains via the RGB matrix and rotary encoders.

Running scx_layered

scx_layered --midi-port 'APC Key 25 mk2:APC Key 25 mk2 APC Key 25 mk2 C 32:1' --stats 1 f:/home/daniel/layered.json

sample scx_layered config:

[{
  "name":"chrome",
  "comment":"chrome",
  "matches":[
     [
	     {"CommPrefix": "chrome"}
     ],
     [
	     {"PcommPrefix": "chrome"}
     ]
  ],
  "kind": {
    "Confined":{
      "exclusive": true,
      "util_range": [0.04, 0.50]
     }
  }
},{
  "name":"ppid 1",
  "comment":"ppid 1",
  "matches":[
     [{"PPIDEquals":1}]
  ],
  "kind": {
    "Confined":{
      "exclusive": true,
      "util_range": [0.01, 0.20]
     }
  }
},{
  "name":"user",
  "comment":"user",
  "matches":[
     [{"UIDEquals":1000}]
  ],
  "kind": {
    "Confined":{
      "exclusive": true,
      "util_range": [0.01, 0.20]
     }
  }
},{
  "name":"stress-ng",
  "comment":"stress-ng",
  "matches":[
     [{"CommPrefix":"stress-ng"}],
     [{"PcommPrefix":"stress-ng"}]
  ],
  "kind": {
    "Confined":{
      "exclusive": true,
      "util_range": [0.01, 0.20]
     }
  }
},
{
  "name":"the rest",
  "comment":"the rest",
  "matches":[[]],
  "kind":{
    "Grouped": {
      "util_range": [0.05, 0.60]
    }
  }
}]

Other fun ideas

In the past I experimented with generating audio via bpf.