rate := int64(atomic.Load64(&mutexprofilerate))
	saveBlockEventStack(cycles, rate, prof.stack[:nstk], mutexProfile)
	if lost > 0 {
		lostStk := [...]uintptr{
			logicalStackSentinel,
			abi.FuncPCABIInternal(_LostContendedRuntimeLock) + sys.PCQuantum,
		}
		saveBlockEventStack(lost, rate, lostStk[:], mutexProfile)
	}

	prof.disabled = false
	releasem(mp)
}