diff --git a/ui/build/config.go b/ui/build/config.go
index dd5bd0c..e271bfc 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -144,6 +144,12 @@
 // fetchEnvConfig optionally fetches environment config from an
 // experiments system to control Soong features dynamically.
 func fetchEnvConfig(ctx Context, config *configImpl, envConfigName string) error {
+	configName := envConfigName + "." + jsonSuffix
+	expConfigFetcher := &smpb.ExpConfigFetcher{}
+	defer func() {
+		ctx.Metrics.ExpConfigFetcher(expConfigFetcher)
+	}()
+
 	s, err := os.Stat(configFetcher)
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -152,31 +158,38 @@
 		return err
 	}
 	if s.Mode()&0111 == 0 {
+		status := smpb.ExpConfigFetcher_ERROR
+		expConfigFetcher.Status = &status
 		return fmt.Errorf("configuration fetcher binary %v is not executable: %v", configFetcher, s.Mode())
 	}
 
-	configExists := false
-	outConfigFilePath := filepath.Join(config.OutDir(), envConfigName+jsonSuffix)
-	if _, err := os.Stat(outConfigFilePath); err == nil {
-		configExists = true
-	}
-
 	tCtx, cancel := context.WithTimeout(ctx, envConfigFetchTimeout)
 	defer cancel()
-	cmd := exec.CommandContext(tCtx, configFetcher, "-output_config_dir", config.OutDir())
+	fetchStart := time.Now()
+	cmd := exec.CommandContext(tCtx, configFetcher, "-output_config_dir", config.OutDir(),
+		"-output_config_name", configName)
 	if err := cmd.Start(); err != nil {
+		status := smpb.ExpConfigFetcher_ERROR
+		expConfigFetcher.Status = &status
 		return err
 	}
 
-	// If a config file already exists, return immediately and run the config file
-	// fetch in the background. Otherwise, wait for the config file to be fetched.
-	if configExists {
-		go cmd.Wait()
-		return nil
-	}
 	if err := cmd.Wait(); err != nil {
+		status := smpb.ExpConfigFetcher_ERROR
+		expConfigFetcher.Status = &status
 		return err
 	}
+	fetchEnd := time.Now()
+	expConfigFetcher.Micros = proto.Uint64(uint64(fetchEnd.Sub(fetchStart).Microseconds()))
+	outConfigFilePath := filepath.Join(config.OutDir(), configName)
+	expConfigFetcher.Filename = proto.String(outConfigFilePath)
+	if _, err := os.Stat(outConfigFilePath); err == nil {
+		status := smpb.ExpConfigFetcher_CONFIG
+		expConfigFetcher.Status = &status
+	} else {
+		status := smpb.ExpConfigFetcher_NO_CONFIG
+		expConfigFetcher.Status = &status
+	}
 	return nil
 }
 
diff --git a/ui/metrics/metrics.go b/ui/metrics/metrics.go
index 6f1ed60..0c62865 100644
--- a/ui/metrics/metrics.go
+++ b/ui/metrics/metrics.go
@@ -38,6 +38,7 @@
 	"time"
 
 	"android/soong/shared"
+
 	"google.golang.org/protobuf/proto"
 
 	soong_metrics_proto "android/soong/ui/metrics/metrics_proto"
@@ -135,6 +136,11 @@
 	m.metrics.SystemResourceInfo = b
 }
 
+// ExpConfigFetcher stores information about the expconfigfetcher.
+func (m *Metrics) ExpConfigFetcher(b *soong_metrics_proto.ExpConfigFetcher) {
+	m.metrics.ExpConfigFetcher = b
+}
+
 // SetMetadataMetrics sets information about the build such as the target
 // product, host architecture and out directory.
 func (m *Metrics) SetMetadataMetrics(metadata map[string]string) {
diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 26229c6..69f5689 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -217,6 +217,65 @@
 	return file_metrics_proto_rawDescGZIP(), []int{5, 0}
 }
 
+type ExpConfigFetcher_ConfigStatus int32
+
+const (
+	ExpConfigFetcher_NO_CONFIG ExpConfigFetcher_ConfigStatus = 0
+	ExpConfigFetcher_CONFIG    ExpConfigFetcher_ConfigStatus = 1
+	ExpConfigFetcher_ERROR     ExpConfigFetcher_ConfigStatus = 2
+)
+
+// Enum value maps for ExpConfigFetcher_ConfigStatus.
+var (
+	ExpConfigFetcher_ConfigStatus_name = map[int32]string{
+		0: "NO_CONFIG",
+		1: "CONFIG",
+		2: "ERROR",
+	}
+	ExpConfigFetcher_ConfigStatus_value = map[string]int32{
+		"NO_CONFIG": 0,
+		"CONFIG":    1,
+		"ERROR":     2,
+	}
+)
+
+func (x ExpConfigFetcher_ConfigStatus) Enum() *ExpConfigFetcher_ConfigStatus {
+	p := new(ExpConfigFetcher_ConfigStatus)
+	*p = x
+	return p
+}
+
+func (x ExpConfigFetcher_ConfigStatus) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (ExpConfigFetcher_ConfigStatus) Descriptor() protoreflect.EnumDescriptor {
+	return file_metrics_proto_enumTypes[3].Descriptor()
+}
+
+func (ExpConfigFetcher_ConfigStatus) Type() protoreflect.EnumType {
+	return &file_metrics_proto_enumTypes[3]
+}
+
+func (x ExpConfigFetcher_ConfigStatus) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Do not use.
+func (x *ExpConfigFetcher_ConfigStatus) UnmarshalJSON(b []byte) error {
+	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
+	if err != nil {
+		return err
+	}
+	*x = ExpConfigFetcher_ConfigStatus(num)
+	return nil
+}
+
+// Deprecated: Use ExpConfigFetcher_ConfigStatus.Descriptor instead.
+func (ExpConfigFetcher_ConfigStatus) EnumDescriptor() ([]byte, []int) {
+	return file_metrics_proto_rawDescGZIP(), []int{9, 0}
+}
+
 type MetricsBase struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -274,6 +333,8 @@
 	BuildCommand *string `protobuf:"bytes,26,opt,name=build_command,json=buildCommand" json:"build_command,omitempty"`
 	// The metrics for calling Bazel.
 	BazelRuns []*PerfInfo `protobuf:"bytes,27,rep,name=bazel_runs,json=bazelRuns" json:"bazel_runs,omitempty"`
+	// The metrics of the experiment config fetcher
+	ExpConfigFetcher *ExpConfigFetcher `protobuf:"bytes,28,opt,name=exp_config_fetcher,json=expConfigFetcher" json:"exp_config_fetcher,omitempty"`
 }
 
 // Default values for MetricsBase fields.
@@ -505,6 +566,13 @@
 	return nil
 }
 
+func (x *MetricsBase) GetExpConfigFetcher() *ExpConfigFetcher {
+	if x != nil {
+		return x.ExpConfigFetcher
+	}
+	return nil
+}
+
 type BuildConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1150,12 +1218,81 @@
 	return nil
 }
 
+type ExpConfigFetcher struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The result of the call to expconfigfetcher
+	// NO_CONFIG - Not part of experiment
+	// CONFIG - Part of experiment, config copied successfully
+	// ERROR - expconfigfetcher failed
+	Status *ExpConfigFetcher_ConfigStatus `protobuf:"varint,1,opt,name=status,enum=soong_build_metrics.ExpConfigFetcher_ConfigStatus" json:"status,omitempty"`
+	// The output config filename
+	Filename *string `protobuf:"bytes,2,opt,name=filename" json:"filename,omitempty"`
+	// Time, in microseconds, taken by the expconfigfetcher
+	Micros *uint64 `protobuf:"varint,3,opt,name=micros" json:"micros,omitempty"`
+}
+
+func (x *ExpConfigFetcher) Reset() {
+	*x = ExpConfigFetcher{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metrics_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExpConfigFetcher) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExpConfigFetcher) ProtoMessage() {}
+
+func (x *ExpConfigFetcher) ProtoReflect() protoreflect.Message {
+	mi := &file_metrics_proto_msgTypes[9]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExpConfigFetcher.ProtoReflect.Descriptor instead.
+func (*ExpConfigFetcher) Descriptor() ([]byte, []int) {
+	return file_metrics_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *ExpConfigFetcher) GetStatus() ExpConfigFetcher_ConfigStatus {
+	if x != nil && x.Status != nil {
+		return *x.Status
+	}
+	return ExpConfigFetcher_NO_CONFIG
+}
+
+func (x *ExpConfigFetcher) GetFilename() string {
+	if x != nil && x.Filename != nil {
+		return *x.Filename
+	}
+	return ""
+}
+
+func (x *ExpConfigFetcher) GetMicros() uint64 {
+	if x != nil && x.Micros != nil {
+		return *x.Micros
+	}
+	return 0
+}
+
 var File_metrics_proto protoreflect.FileDescriptor
 
 var file_metrics_proto_rawDesc = []byte{
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@@ -1249,122 +1386,140 @@
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@@ -1382,46 +1537,50 @@
 	return file_metrics_proto_rawDescData
 }
 
-var file_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
+var file_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
+var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_metrics_proto_goTypes = []interface{}{
 	(MetricsBase_BuildVariant)(0),       // 0: soong_build_metrics.MetricsBase.BuildVariant
 	(MetricsBase_Arch)(0),               // 1: soong_build_metrics.MetricsBase.Arch
 	(ModuleTypeInfo_BuildSystem)(0),     // 2: soong_build_metrics.ModuleTypeInfo.BuildSystem
-	(*MetricsBase)(nil),                 // 3: soong_build_metrics.MetricsBase
-	(*BuildConfig)(nil),                 // 4: soong_build_metrics.BuildConfig
-	(*SystemResourceInfo)(nil),          // 5: soong_build_metrics.SystemResourceInfo
-	(*PerfInfo)(nil),                    // 6: soong_build_metrics.PerfInfo
-	(*ProcessResourceInfo)(nil),         // 7: soong_build_metrics.ProcessResourceInfo
-	(*ModuleTypeInfo)(nil),              // 8: soong_build_metrics.ModuleTypeInfo
-	(*CriticalUserJourneyMetrics)(nil),  // 9: soong_build_metrics.CriticalUserJourneyMetrics
-	(*CriticalUserJourneysMetrics)(nil), // 10: soong_build_metrics.CriticalUserJourneysMetrics
-	(*SoongBuildMetrics)(nil),           // 11: soong_build_metrics.SoongBuildMetrics
+	(ExpConfigFetcher_ConfigStatus)(0),  // 3: soong_build_metrics.ExpConfigFetcher.ConfigStatus
+	(*MetricsBase)(nil),                 // 4: soong_build_metrics.MetricsBase
+	(*BuildConfig)(nil),                 // 5: soong_build_metrics.BuildConfig
+	(*SystemResourceInfo)(nil),          // 6: soong_build_metrics.SystemResourceInfo
+	(*PerfInfo)(nil),                    // 7: soong_build_metrics.PerfInfo
+	(*ProcessResourceInfo)(nil),         // 8: soong_build_metrics.ProcessResourceInfo
+	(*ModuleTypeInfo)(nil),              // 9: soong_build_metrics.ModuleTypeInfo
+	(*CriticalUserJourneyMetrics)(nil),  // 10: soong_build_metrics.CriticalUserJourneyMetrics
+	(*CriticalUserJourneysMetrics)(nil), // 11: soong_build_metrics.CriticalUserJourneysMetrics
+	(*SoongBuildMetrics)(nil),           // 12: soong_build_metrics.SoongBuildMetrics
+	(*ExpConfigFetcher)(nil),            // 13: soong_build_metrics.ExpConfigFetcher
 }
 var file_metrics_proto_depIdxs = []int32{
 	0,  // 0: soong_build_metrics.MetricsBase.target_build_variant:type_name -> soong_build_metrics.MetricsBase.BuildVariant
 	1,  // 1: soong_build_metrics.MetricsBase.target_arch:type_name -> soong_build_metrics.MetricsBase.Arch
 	1,  // 2: soong_build_metrics.MetricsBase.host_arch:type_name -> soong_build_metrics.MetricsBase.Arch
 	1,  // 3: soong_build_metrics.MetricsBase.host_2nd_arch:type_name -> soong_build_metrics.MetricsBase.Arch
-	6,  // 4: soong_build_metrics.MetricsBase.setup_tools:type_name -> soong_build_metrics.PerfInfo
-	6,  // 5: soong_build_metrics.MetricsBase.kati_runs:type_name -> soong_build_metrics.PerfInfo
-	6,  // 6: soong_build_metrics.MetricsBase.soong_runs:type_name -> soong_build_metrics.PerfInfo
-	6,  // 7: soong_build_metrics.MetricsBase.ninja_runs:type_name -> soong_build_metrics.PerfInfo
-	6,  // 8: soong_build_metrics.MetricsBase.total:type_name -> soong_build_metrics.PerfInfo
-	11, // 9: soong_build_metrics.MetricsBase.soong_build_metrics:type_name -> soong_build_metrics.SoongBuildMetrics
-	4,  // 10: soong_build_metrics.MetricsBase.build_config:type_name -> soong_build_metrics.BuildConfig
-	5,  // 11: soong_build_metrics.MetricsBase.system_resource_info:type_name -> soong_build_metrics.SystemResourceInfo
-	6,  // 12: soong_build_metrics.MetricsBase.bazel_runs:type_name -> soong_build_metrics.PerfInfo
-	7,  // 13: soong_build_metrics.PerfInfo.processes_resource_info:type_name -> soong_build_metrics.ProcessResourceInfo
-	2,  // 14: soong_build_metrics.ModuleTypeInfo.build_system:type_name -> soong_build_metrics.ModuleTypeInfo.BuildSystem
-	3,  // 15: soong_build_metrics.CriticalUserJourneyMetrics.metrics:type_name -> soong_build_metrics.MetricsBase
-	9,  // 16: soong_build_metrics.CriticalUserJourneysMetrics.cujs:type_name -> soong_build_metrics.CriticalUserJourneyMetrics
-	6,  // 17: soong_build_metrics.SoongBuildMetrics.events:type_name -> soong_build_metrics.PerfInfo
-	18, // [18:18] is the sub-list for method output_type
-	18, // [18:18] is the sub-list for method input_type
-	18, // [18:18] is the sub-list for extension type_name
-	18, // [18:18] is the sub-list for extension extendee
-	0,  // [0:18] is the sub-list for field type_name
+	7,  // 4: soong_build_metrics.MetricsBase.setup_tools:type_name -> soong_build_metrics.PerfInfo
+	7,  // 5: soong_build_metrics.MetricsBase.kati_runs:type_name -> soong_build_metrics.PerfInfo
+	7,  // 6: soong_build_metrics.MetricsBase.soong_runs:type_name -> soong_build_metrics.PerfInfo
+	7,  // 7: soong_build_metrics.MetricsBase.ninja_runs:type_name -> soong_build_metrics.PerfInfo
+	7,  // 8: soong_build_metrics.MetricsBase.total:type_name -> soong_build_metrics.PerfInfo
+	12, // 9: soong_build_metrics.MetricsBase.soong_build_metrics:type_name -> soong_build_metrics.SoongBuildMetrics
+	5,  // 10: soong_build_metrics.MetricsBase.build_config:type_name -> soong_build_metrics.BuildConfig
+	6,  // 11: soong_build_metrics.MetricsBase.system_resource_info:type_name -> soong_build_metrics.SystemResourceInfo
+	7,  // 12: soong_build_metrics.MetricsBase.bazel_runs:type_name -> soong_build_metrics.PerfInfo
+	13, // 13: soong_build_metrics.MetricsBase.exp_config_fetcher:type_name -> soong_build_metrics.ExpConfigFetcher
+	8,  // 14: soong_build_metrics.PerfInfo.processes_resource_info:type_name -> soong_build_metrics.ProcessResourceInfo
+	2,  // 15: soong_build_metrics.ModuleTypeInfo.build_system:type_name -> soong_build_metrics.ModuleTypeInfo.BuildSystem
+	4,  // 16: soong_build_metrics.CriticalUserJourneyMetrics.metrics:type_name -> soong_build_metrics.MetricsBase
+	10, // 17: soong_build_metrics.CriticalUserJourneysMetrics.cujs:type_name -> soong_build_metrics.CriticalUserJourneyMetrics
+	7,  // 18: soong_build_metrics.SoongBuildMetrics.events:type_name -> soong_build_metrics.PerfInfo
+	3,  // 19: soong_build_metrics.ExpConfigFetcher.status:type_name -> soong_build_metrics.ExpConfigFetcher.ConfigStatus
+	20, // [20:20] is the sub-list for method output_type
+	20, // [20:20] is the sub-list for method input_type
+	20, // [20:20] is the sub-list for extension type_name
+	20, // [20:20] is the sub-list for extension extendee
+	0,  // [0:20] is the sub-list for field type_name
 }
 
 func init() { file_metrics_proto_init() }
@@ -1538,14 +1697,26 @@
 				return nil
 			}
 		}
+		file_metrics_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExpConfigFetcher); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_metrics_proto_rawDesc,
-			NumEnums:      3,
-			NumMessages:   9,
+			NumEnums:      4,
+			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 26e4d73..814eb67 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -108,6 +108,9 @@
 
   // The metrics for calling Bazel.
   repeated PerfInfo bazel_runs = 27;
+
+  // The metrics of the experiment config fetcher
+  optional ExpConfigFetcher exp_config_fetcher = 28;
 }
 
 message BuildConfig {
@@ -239,3 +242,22 @@
   // Runtime metrics for soong_build execution.
   repeated PerfInfo events = 6;
 }
+
+message ExpConfigFetcher {
+  enum ConfigStatus {
+    NO_CONFIG = 0;
+    CONFIG = 1;
+    ERROR = 2;
+  }
+  // The result of the call to expconfigfetcher
+  // NO_CONFIG - Not part of experiment
+  // CONFIG - Part of experiment, config copied successfully
+  // ERROR - expconfigfetcher failed
+  optional ConfigStatus status = 1;
+
+  // The output config filename
+  optional string filename = 2;
+
+  // Time, in microseconds, taken by the expconfigfetcher
+  optional uint64 micros = 3;
+}