mirror of https://github.com/prometheus/prometheus
115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
// +build !appengine
|
|
|
|
/*
|
|
*
|
|
* Copyright 2018 gRPC 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 syscall provides functionalities that grpc uses to get low-level operating system
|
|
// stats/info.
|
|
package syscall
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"syscall"
|
|
"time"
|
|
|
|
"golang.org/x/sys/unix"
|
|
"google.golang.org/grpc/grpclog"
|
|
)
|
|
|
|
// GetCPUTime returns the how much CPU time has passed since the start of this process.
|
|
func GetCPUTime() int64 {
|
|
var ts unix.Timespec
|
|
if err := unix.ClockGettime(unix.CLOCK_PROCESS_CPUTIME_ID, &ts); err != nil {
|
|
grpclog.Fatal(err)
|
|
}
|
|
return ts.Nano()
|
|
}
|
|
|
|
// Rusage is an alias for syscall.Rusage under linux non-appengine environment.
|
|
type Rusage syscall.Rusage
|
|
|
|
// GetRusage returns the resource usage of current process.
|
|
func GetRusage() (rusage *Rusage) {
|
|
rusage = new(Rusage)
|
|
syscall.Getrusage(syscall.RUSAGE_SELF, (*syscall.Rusage)(rusage))
|
|
return
|
|
}
|
|
|
|
// CPUTimeDiff returns the differences of user CPU time and system CPU time used
|
|
// between two Rusage structs.
|
|
func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) {
|
|
f := (*syscall.Rusage)(first)
|
|
l := (*syscall.Rusage)(latest)
|
|
var (
|
|
utimeDiffs = l.Utime.Sec - f.Utime.Sec
|
|
utimeDiffus = l.Utime.Usec - f.Utime.Usec
|
|
stimeDiffs = l.Stime.Sec - f.Stime.Sec
|
|
stimeDiffus = l.Stime.Usec - f.Stime.Usec
|
|
)
|
|
|
|
uTimeElapsed := float64(utimeDiffs) + float64(utimeDiffus)*1.0e-6
|
|
sTimeElapsed := float64(stimeDiffs) + float64(stimeDiffus)*1.0e-6
|
|
|
|
return uTimeElapsed, sTimeElapsed
|
|
}
|
|
|
|
// SetTCPUserTimeout sets the TCP user timeout on a connection's socket
|
|
func SetTCPUserTimeout(conn net.Conn, timeout time.Duration) error {
|
|
tcpconn, ok := conn.(*net.TCPConn)
|
|
if !ok {
|
|
// not a TCP connection. exit early
|
|
return nil
|
|
}
|
|
rawConn, err := tcpconn.SyscallConn()
|
|
if err != nil {
|
|
return fmt.Errorf("error getting raw connection: %v", err)
|
|
}
|
|
err = rawConn.Control(func(fd uintptr) {
|
|
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_USER_TIMEOUT, int(timeout/time.Millisecond))
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("error setting option on socket: %v", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// GetTCPUserTimeout gets the TCP user timeout on a connection's socket
|
|
func GetTCPUserTimeout(conn net.Conn) (opt int, err error) {
|
|
tcpconn, ok := conn.(*net.TCPConn)
|
|
if !ok {
|
|
err = fmt.Errorf("conn is not *net.TCPConn. got %T", conn)
|
|
return
|
|
}
|
|
rawConn, err := tcpconn.SyscallConn()
|
|
if err != nil {
|
|
err = fmt.Errorf("error getting raw connection: %v", err)
|
|
return
|
|
}
|
|
err = rawConn.Control(func(fd uintptr) {
|
|
opt, err = syscall.GetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_USER_TIMEOUT)
|
|
})
|
|
if err != nil {
|
|
err = fmt.Errorf("error getting option on socket: %v", err)
|
|
return
|
|
}
|
|
|
|
return
|
|
}
|