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import { execFile, spawn } from 'child_process'
import interpreters from './interpreters'
import modules from './modules'
import kill from 'tree-kill'
import { remote } from './remote'
import { set_connected } from './rpc'
import uuidv1 from 'uuid/v1'
const idle_state = { status: 'IDLE', task: {} }
export const state = {
current_cpu_task: idle_state,
current_gpu_task: idle_state,
}
export function get_current_cpu_task(){
return state.current_cpu_task
}
export function get_current_gpu_task(){
return state.current_gpu_task
}
export function get_current_task(processor) {
if (processor === 'cpu') {
return state.current_cpu_task
} else {
return state.current_gpu_task
}
}
function serialize_task(t){
if (!t || t.status === 'IDLE') {
return {
status: 'IDLE',
}
}
return {
status: 'RUNNING',
task: t.task,
uuid: t.task.uuid,
pid: t.subprocess.pid,
}
}
function clear_task(is_gpu, task){
if (is_gpu) {
if (state.current_gpu_task.task && state.current_gpu_task.task.uuid === task.uuid) {
state.current_gpu_task = idle_state
}
} else {
if (state.current_cpu_task.task && state.current_cpu_task.task.uuid === task.uuid) {
state.current_cpu_task = idle_state
}
}
}
export function status () {
return {
cpu: serialize_task(state.current_cpu_task),
gpu: serialize_task(state.current_gpu_task),
}
}
export function build_params(module, task) {
const activity = module.activities[task.activity]
const interpreter = interpreters[activity.type]
let opt_params;
if (activity.build_params) {
opt_params = activity.build_params(task)
}
else {
const opt = task.opt
opt_params = Object.keys(opt).map(key => {
const flag = '--' + key.replace(/-/g, '_')
const value = opt[key]
if (value === 'true') {
return [flag]
}
return [flag, value]
}).reduce((acc, cur) => acc.concat(cur), [])
}
const params = (interpreter.params || [])
.concat([ activity.script ])
.concat(activity.params || [])
.concat(opt_params)
return {
activity,
interpreter,
params
}
}
export function run_system_command(cmd, cb) {
console.log('running system command:', cmd)
switch(cmd) {
case 'nvidia-smi':
case 'ps':
case 'uptime':
case 'w':
execFile(cmd, cb)
break
case 'df':
execFile('df', ['-h'], cb)
break
default:
cb({ error: 'no such command' })
break
}
}
export function run_task(task, preempt, watch){
const module = modules[task.module]
if (! module) return { type: 'error', error: "No such module: " + task.module }
const { activity, interpreter, params } = build_params(module, task)
if (! interpreter) return { type: 'error', error: "No such interpreter: " + activity.interpreter }
if (interpreter.gpu && state.current_gpu_task.status !== 'IDLE') {
if (preempt) {
console.log('preempting currently running GPU task')
terminate(state.current_gpu_task.subprocess)
} else {
console.log('already running GPU task :(', state.current_gpu_task.pid)
return { type: 'error', error: 'task already running on gpu' }
}
} else if (!interpreter.gpu && state.current_cpu_task.status !== 'IDLE') {
if (preempt) {
console.log('preempting currently running CPU task')
terminate(state.current_cpu_task.subprocess)
} else {
console.log('already running CPU task :(')
return { type: 'error', error: 'task already running on cpu' }
}
}
console.log('running task', task.activity)
console.log(module.cwd)
console.log(interpreter.cmd, params)
const subprocess = spawn(interpreter.cmd, params, {
cwd: module.cwd,
})
if (interpreter.gpu) {
state.current_gpu_task = {
subprocess, task, status: 'RUNNING'
}
}
else {
state.current_cpu_task = {
subprocess, task, status: 'RUNNING'
}
}
task.uuid = task.uuid || uuidv1()
const processor = task.processor = interpreter.gpu ? 'gpu' : 'cpu'
remote.emit('task_res', { type: 'task_begin', task })
watch && console.log("watching stdout..")
subprocess.stdout.on('data', data => {
watch && remote.emit('task_res', { type: 'stdout', processor, data: data.toString('utf8') })
})
subprocess.stderr.on('data', data => {
watch && remote.emit('task_res', { type: 'stderr', processor, data: data.toString('utf8') })
})
let finished = false
subprocess.on('error', (err) => {
if (finished) return
finished = true
console.log('task error', subprocess.exitCode, err)
clear_task(interpreter.gpu, task)
remote.emit('task_res', { type: 'task_error', task, err })
set_connected(false)
})
subprocess.on('close', () => {
if (finished) return
finished = true
console.log('task ended', subprocess.exitCode || '')
clear_task(interpreter.gpu, task)
remote.emit('task_res', { type: 'task_finish', task })
set_connected(false)
})
}
export function stop_task(task){
if (state.current_cpu_task.task.uuid === task.uuid) {
terminate(state.current_cpu_task.subprocess)
return { status: 'ok' }
} else if (state.current_gpu_task.task.uuid === task.uuid) {
terminate(state.current_gpu_task.subprocess)
return { status: 'ok' }
}
return { error: 'no such task' }
}
export function terminate(subprocess){
if (!subprocess) {
return
}
console.log('kill pid', subprocess.pid)
kill(subprocess.pid)
}
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