diff --git a/cmd/metrics/metadata.go b/cmd/metrics/metadata.go
index 51d6c6f1..6ee13d3a 100644
--- a/cmd/metrics/metadata.go
+++ b/cmd/metrics/metadata.go
@@ -401,10 +401,46 @@ func getMetadataScripts(noRoot bool, noSystemSummary bool, numGPCounters int) (m
 			Superuser:      !noRoot,
 		},
 		{
-			Name:           "perf supported events",
-			ScriptTemplate: "perf list",
-			Superuser:      !noRoot,
-			Depends:        []string{"perf"},
+			Name: "perf supported events",
+			ScriptTemplate: `# Parse perf list JSON output to extract Hardware events and cstate/power events
+perf list --json 2>/dev/null | awk '
+BEGIN { 
+    in_hardware_event = 0
+    event_name = ""
+}
+
+# Capture EventName
+/"EventName":/ {
+    # Extract the value between quotes after "EventName":
+    line = $0
+    sub(/.*"EventName": "/, "", line)
+    sub(/".*/, "", line)
+    event_name = line
+}
+
+# Check if EventType is Hardware event
+/"EventType": "Hardware event"/ {
+    in_hardware_event = 1
+}
+
+# At end of object (closing brace), check if we should print
+/^}/ {
+    if (in_hardware_event || 
+        event_name ~ /^cstate_core\// || 
+        event_name ~ /^cstate_pkg\// || 
+        event_name ~ /^power\//) {
+        if (event_name != "") {
+            print event_name
+        }
+    }
+    # Reset for next object
+    in_hardware_event = 0
+    event_name = ""
+}
+' # end of awk
+`,
+			Superuser: !noRoot,
+			Depends:   []string{"perf"},
 		},
 		{
 			Name:           "list uncore devices",
diff --git a/cmd/metrics/summary.go b/cmd/metrics/summary.go
index 2b27b867..c08a231c 100644
--- a/cmd/metrics/summary.go
+++ b/cmd/metrics/summary.go
@@ -16,7 +16,6 @@ import (
 	"os"
 	"path/filepath"
 	"perfspect/internal/cpus"
-	"regexp"
 	"slices"
 	"strconv"
 	texttemplate "text/template" // nosemgrep
@@ -628,13 +627,7 @@ func (mg *MetricGroup) loadHTMLTemplateValues(metadata Metadata, metricDefinitio
 	if err != nil {
 		return
 	}
-	// remove PerfSupportedEvents from json
-	re := regexp.MustCompile(`"PerfSupportedEvents":".*?",`)
-	jsonMetadataPurged := re.ReplaceAll(jsonMetadata, []byte(""))
-	// remove SystemSummaryFields from json
-	re = regexp.MustCompile(`,"SystemSummaryFields":\[\[.*?\]\]`)
-	jsonMetadataPurged = re.ReplaceAll(jsonMetadataPurged, []byte(""))
-	templateVals["METADATA"] = string(jsonMetadataPurged)
+	templateVals["METADATA"] = string(jsonMetadata)
 
 	// system info tab
 	jsonSystemInfo, err := json.Marshal(metadata.SystemSummaryFields)