Collect metrics from inside soong_build
Collect the number of modules and variants and some basic statistics
on memory usage inside soong_build by writing out a proto that is
read back in by soong_ui.
Test: examine soong.log
Change-Id: I6926876377a4f6229cf41fdbf166ae03c885ea55
diff --git a/android/metrics.go b/android/metrics.go
new file mode 100644
index 0000000..b7aee54
--- /dev/null
+++ b/android/metrics.go
@@ -0,0 +1,87 @@
+// Copyright 2020 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android
+
+import (
+ "io/ioutil"
+ "runtime"
+
+ "github.com/golang/protobuf/proto"
+
+ soong_metrics_proto "android/soong/ui/metrics/metrics_proto"
+)
+
+var soongMetricsOnceKey = NewOnceKey("soong metrics")
+
+type SoongMetrics struct {
+ Modules int
+ Variants int
+}
+
+func ReadSoongMetrics(config Config) SoongMetrics {
+ return config.Get(soongMetricsOnceKey).(SoongMetrics)
+}
+
+func init() {
+ RegisterSingletonType("soong_metrics", soongMetricsSingletonFactory)
+}
+
+func soongMetricsSingletonFactory() Singleton { return soongMetricsSingleton{} }
+
+type soongMetricsSingleton struct{}
+
+func (soongMetricsSingleton) GenerateBuildActions(ctx SingletonContext) {
+ metrics := SoongMetrics{}
+ ctx.VisitAllModules(func(m Module) {
+ if ctx.PrimaryModule(m) == m {
+ metrics.Modules++
+ }
+ metrics.Variants++
+ })
+ ctx.Config().Once(soongMetricsOnceKey, func() interface{} {
+ return metrics
+ })
+}
+
+func collectMetrics(config Config) *soong_metrics_proto.SoongBuildMetrics {
+ metrics := &soong_metrics_proto.SoongBuildMetrics{}
+
+ soongMetrics := ReadSoongMetrics(config)
+ metrics.Modules = proto.Uint32(uint32(soongMetrics.Modules))
+ metrics.Variants = proto.Uint32(uint32(soongMetrics.Variants))
+
+ memStats := runtime.MemStats{}
+ runtime.ReadMemStats(&memStats)
+ metrics.MaxHeapSize = proto.Uint64(memStats.HeapSys)
+ metrics.TotalAllocCount = proto.Uint64(memStats.Mallocs)
+ metrics.TotalAllocSize = proto.Uint64(memStats.TotalAlloc)
+
+ return metrics
+}
+
+func WriteMetrics(config Config, metricsFile string) error {
+ metrics := collectMetrics(config)
+
+ buf, err := proto.Marshal(metrics)
+ if err != nil {
+ return err
+ }
+ err = ioutil.WriteFile(absolutePath(metricsFile), buf, 0666)
+ if err != nil {
+ return err
+ }
+
+ return nil
+}