1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// Copyright 2021 The gVisor Authors.
//
// 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 cgroupfs
import (
"bytes"
"fmt"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/usage"
)
// +stateify savable
type cpuacctController struct {
controllerCommon
}
var _ controller = (*cpuacctController)(nil)
func newCPUAcctController(fs *filesystem) *cpuacctController {
c := &cpuacctController{}
c.controllerCommon.init(controllerCPUAcct, fs)
return c
}
// AddControlFiles implements controller.AddControlFiles.
func (c *cpuacctController) AddControlFiles(ctx context.Context, creds *auth.Credentials, cg *cgroupInode, contents map[string]kernfs.Inode) {
cpuacctCG := &cpuacctCgroup{cg}
contents["cpuacct.stat"] = c.fs.newControllerFile(ctx, creds, &cpuacctStatData{cpuacctCG})
contents["cpuacct.usage"] = c.fs.newControllerFile(ctx, creds, &cpuacctUsageData{cpuacctCG})
contents["cpuacct.usage_user"] = c.fs.newControllerFile(ctx, creds, &cpuacctUsageUserData{cpuacctCG})
contents["cpuacct.usage_sys"] = c.fs.newControllerFile(ctx, creds, &cpuacctUsageSysData{cpuacctCG})
}
// +stateify savable
type cpuacctCgroup struct {
*cgroupInode
}
func (c *cpuacctCgroup) collectCPUStats() usage.CPUStats {
var cs usage.CPUStats
c.fs.tasksMu.RLock()
// Note: This isn't very accurate, since the tasks are potentially
// still running as we accumulate their stats.
for t := range c.ts {
cs.Accumulate(t.CPUStats())
}
c.fs.tasksMu.RUnlock()
return cs
}
// +stateify savable
type cpuacctStatData struct {
*cpuacctCgroup
}
// Generate implements vfs.DynamicBytesSource.Generate.
func (d *cpuacctStatData) Generate(ctx context.Context, buf *bytes.Buffer) error {
cs := d.collectCPUStats()
fmt.Fprintf(buf, "user %d\n", linux.ClockTFromDuration(cs.UserTime))
fmt.Fprintf(buf, "system %d\n", linux.ClockTFromDuration(cs.SysTime))
return nil
}
// +stateify savable
type cpuacctUsageData struct {
*cpuacctCgroup
}
// Generate implements vfs.DynamicBytesSource.Generate.
func (d *cpuacctUsageData) Generate(ctx context.Context, buf *bytes.Buffer) error {
cs := d.collectCPUStats()
fmt.Fprintf(buf, "%d\n", cs.UserTime.Nanoseconds()+cs.SysTime.Nanoseconds())
return nil
}
// +stateify savable
type cpuacctUsageUserData struct {
*cpuacctCgroup
}
// Generate implements vfs.DynamicBytesSource.Generate.
func (d *cpuacctUsageUserData) Generate(ctx context.Context, buf *bytes.Buffer) error {
cs := d.collectCPUStats()
fmt.Fprintf(buf, "%d\n", cs.UserTime.Nanoseconds())
return nil
}
// +stateify savable
type cpuacctUsageSysData struct {
*cpuacctCgroup
}
// Generate implements vfs.DynamicBytesSource.Generate.
func (d *cpuacctUsageSysData) Generate(ctx context.Context, buf *bytes.Buffer) error {
cs := d.collectCPUStats()
fmt.Fprintf(buf, "%d\n", cs.SysTime.Nanoseconds())
return nil
}
|
