diff --git a/probe/docker/container.go b/probe/docker/container.go
index c6ed85391..5f020e1d6 100644
--- a/probe/docker/container.go
+++ b/probe/docker/container.go
@@ -378,7 +378,6 @@ func (c *container) cpuPercentMetric(stats []docker.Stats) report.Metric {
 	}
 
 	samples := make([]report.Sample, len(stats)-1)
-	var max float64
 	previous := stats[0]
 	for i, s := range stats[1:] {
 		// Copies from docker/api/client/stats.go#L205
@@ -386,17 +385,13 @@ func (c *container) cpuPercentMetric(stats []docker.Stats) report.Metric {
 		systemDelta := float64(s.CPUStats.SystemCPUUsage - previous.CPUStats.SystemCPUUsage)
 		cpuPercent := 0.0
 		if systemDelta > 0.0 && cpuDelta > 0.0 {
-			cpuPercent = (cpuDelta / systemDelta) * float64(len(s.CPUStats.CPUUsage.PercpuUsage)) * 100.0
+			cpuPercent = (cpuDelta / systemDelta) * 100.0
 		}
 		samples[i].Timestamp = s.Read
 		samples[i].Value = cpuPercent
-		available := float64(len(s.CPUStats.CPUUsage.PercpuUsage)) * 100.0
-		if available >= max {
-			max = available
-		}
 		previous = s
 	}
-	return report.MakeMetric(samples).WithMax(max)
+	return report.MakeMetric(samples).WithMax(100.0)
 }
 
 func (c *container) metrics() report.Metrics {
diff --git a/probe/host/system_darwin.go b/probe/host/system_darwin.go
index 33b3db5b6..b31955919 100644
--- a/probe/host/system_darwin.go
+++ b/probe/host/system_darwin.go
@@ -74,7 +74,7 @@ var GetUptime = func() (time.Duration, error) {
 	return (time.Duration(d) * 24 * time.Hour) + (time.Duration(h) * time.Hour) + (time.Duration(m) * time.Minute), nil
 }
 
-// GetCPUUsagePercent returns the percent cpu usage and max (ie #cpus * 100)
+// GetCPUUsagePercent returns the percent cpu usage and max (i.e. 100% or 0 if unavailable)
 var GetCPUUsagePercent = func() (float64, float64) {
 	return 0.0, 0.0
 }
diff --git a/probe/host/system_linux.go b/probe/host/system_linux.go
index cde84a3f2..dbc860a0f 100644
--- a/probe/host/system_linux.go
+++ b/probe/host/system_linux.go
@@ -71,7 +71,7 @@ var GetUptime = func() (time.Duration, error) {
 
 var previousStat = linuxproc.CPUStat{}
 
-// GetCPUUsagePercent returns the percent cpu usage and max (ie #cpus * 100)
+// GetCPUUsagePercent returns the percent cpu usage and max (i.e. 100% or 0 if unavailable)
 var GetCPUUsagePercent = func() (float64, float64) {
 	stat, err := linuxproc.ReadStat(ProcStat)
 	if err != nil {
@@ -94,7 +94,7 @@ var GetCPUUsagePercent = func() (float64, float64) {
 		idled  = idle - prevIdle
 	)
 	previousStat = currentStat
-	return float64(totald-idled) * 100. / float64(totald), float64(len(stat.CPUStats)) * 100.
+	return float64(totald-idled) * 100. / float64(totald), 100.
 }
 
 // GetMemoryUsageBytes returns the bytes memory usage and max