gprof := gp
		var mp *m
		var pp *p
		if gp != nil && gp.m != nil {
			if gp.m.curg != nil {
				gprof = gp.m.curg
			}
			mp = gp.m
			pp = gp.m.p.ptr()
		}
		traceCPUSample(gprof, mp, pp, stk[:n])
	}
	getg().m.mallocing--
}

// setcpuprofilerate sets the CPU profiling rate to hz times per second.
// If hz <= 0, setcpuprofilerate turns off CPU profiling.