72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
// Copyright 2018 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 metrics
|
|
|
|
import (
|
|
"time"
|
|
|
|
"android/soong/ui/metrics/metrics_proto"
|
|
"android/soong/ui/tracer"
|
|
)
|
|
|
|
type timeEvent struct {
|
|
desc string
|
|
name string
|
|
|
|
atNanos uint64 // timestamp measured in nanoseconds since the reference date
|
|
}
|
|
|
|
type TimeTracer interface {
|
|
Begin(name, desc string, thread tracer.Thread)
|
|
End(thread tracer.Thread) metrics_proto.PerfInfo
|
|
}
|
|
|
|
type timeTracerImpl struct {
|
|
activeEvents []timeEvent
|
|
}
|
|
|
|
var _ TimeTracer = &timeTracerImpl{}
|
|
|
|
func (t *timeTracerImpl) now() uint64 {
|
|
return uint64(time.Now().UnixNano())
|
|
}
|
|
|
|
func (t *timeTracerImpl) Begin(name, desc string, thread tracer.Thread) {
|
|
t.beginAt(name, desc, t.now())
|
|
}
|
|
|
|
func (t *timeTracerImpl) beginAt(name, desc string, atNanos uint64) {
|
|
t.activeEvents = append(t.activeEvents, timeEvent{name: name, desc: desc, atNanos: atNanos})
|
|
}
|
|
|
|
func (t *timeTracerImpl) End(thread tracer.Thread) metrics_proto.PerfInfo {
|
|
return t.endAt(t.now())
|
|
}
|
|
|
|
func (t *timeTracerImpl) endAt(atNanos uint64) metrics_proto.PerfInfo {
|
|
if len(t.activeEvents) < 1 {
|
|
panic("Internal error: No pending events for endAt to end!")
|
|
}
|
|
lastEvent := t.activeEvents[len(t.activeEvents)-1]
|
|
t.activeEvents = t.activeEvents[:len(t.activeEvents)-1]
|
|
realTime := atNanos - lastEvent.atNanos
|
|
|
|
return metrics_proto.PerfInfo{
|
|
Desc: &lastEvent.desc,
|
|
Name: &lastEvent.name,
|
|
StartTime: &lastEvent.atNanos,
|
|
RealTime: &realTime}
|
|
}
|