github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/state/state_metadata.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package state
    16  
    17  import (
    18  	"fmt"
    19  	"time"
    20  
    21  	"github.com/SagerNet/gvisor/pkg/log"
    22  )
    23  
    24  // The save metadata keys for timestamp.
    25  const (
    26  	cpuUsage          = "cpu_usage"
    27  	metadataTimestamp = "timestamp"
    28  )
    29  
    30  func addSaveMetadata(m map[string]string) {
    31  	t, err := CPUTime()
    32  	if err != nil {
    33  		log.Warningf("Error getting cpu time: %v", err)
    34  	}
    35  	if previousMetadata != nil {
    36  		p, err := time.ParseDuration(previousMetadata[cpuUsage])
    37  		if err != nil {
    38  			log.Warningf("Error parsing previous runs' cpu time: %v", err)
    39  		}
    40  		t += p
    41  	}
    42  	m[cpuUsage] = t.String()
    43  
    44  	m[metadataTimestamp] = fmt.Sprintf("%v", time.Now())
    45  }