// safe to set MemProfileRate to 0.
	if disableMemoryProfiling {
		MemProfileRate = 0
	}

	// mcommoninit runs before parsedebugvars, so init profstacks again.
	mProfStackInit(gp.m)

	lock(&sched.lock)
	sched.lastpoll.Store(nanotime())
	procs := ncpu
	if n, ok := atoi32(gogetenv("GOMAXPROCS")); ok && n > 0 {
		procs = n
	}