/
utils.go
150 lines (135 loc) · 3.63 KB
/
utils.go
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package boomer
import (
"crypto/md5"
"fmt"
"io"
"math"
"os"
"runtime/pprof"
"strings"
"time"
"github.com/rs/zerolog/log"
uuid "github.com/satori/go.uuid"
"github.com/shirou/gopsutil/cpu"
"github.com/shirou/gopsutil/mem"
"github.com/shirou/gopsutil/process"
)
func round(val float64, roundOn float64, places int) (newVal float64) {
var round float64
pow := math.Pow(10, float64(places))
digit := pow * val
_, div := math.Modf(digit)
if div >= roundOn {
round = math.Ceil(digit)
} else {
round = math.Floor(digit)
}
newVal = round / pow
return
}
// genMD5 returns the md5 hash of strings.
func genMD5(slice ...string) string {
h := md5.New()
for _, v := range slice {
io.WriteString(h, v)
}
return fmt.Sprintf("%x", h.Sum(nil))
}
// startMemoryProfile starts memory profiling and save the results in file.
func startMemoryProfile(file string, duration time.Duration) (err error) {
f, err := os.Create(file)
if err != nil {
return err
}
log.Info().Dur("duration", duration).Msg("Start memory profiling")
time.AfterFunc(duration, func() {
err := pprof.WriteHeapProfile(f)
if err != nil {
log.Error().Err(err).Msg("failed to write memory profile")
}
f.Close()
log.Info().Dur("duration", duration).Msg("Stop memory profiling")
})
return nil
}
// startCPUProfile starts cpu profiling and save the results in file.
func startCPUProfile(file string, duration time.Duration) (err error) {
f, err := os.Create(file)
if err != nil {
return err
}
log.Info().Dur("duration", duration).Msg("Start CPU profiling")
err = pprof.StartCPUProfile(f)
if err != nil {
f.Close()
return err
}
time.AfterFunc(duration, func() {
pprof.StopCPUProfile()
f.Close()
log.Info().Dur("duration", duration).Msg("Stop CPU profiling")
})
return nil
}
// generate a random nodeID like locust does, using the same algorithm.
func getNodeID() (nodeID string) {
hostname, _ := os.Hostname()
id := strings.Replace(uuid.NewV4().String(), "-", "", -1)
nodeID = fmt.Sprintf("%s_%s", hostname, id)
return
}
// GetCurrentPidCPUUsage get current pid CPU usage
func GetCurrentPidCPUUsage() float64 {
currentPid := os.Getpid()
p, err := process.NewProcess(int32(currentPid))
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
percent, err := p.CPUPercent()
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
return percent
}
// GetCurrentPidCPUPercent get the percentage of current pid cpu used
func GetCurrentPidCPUPercent() float64 {
currentPid := os.Getpid()
p, err := process.NewProcess(int32(currentPid))
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
percent, err := p.Percent(time.Second)
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
return percent
}
// GetCurrentCPUPercent get the percentage of current cpu used
func GetCurrentCPUPercent() float64 {
percent, _ := cpu.Percent(time.Second, false)
return percent[0]
}
// GetCurrentMemoryPercent get the percentage of current memory used
func GetCurrentMemoryPercent() float64 {
memInfo, _ := mem.VirtualMemory()
return memInfo.UsedPercent
}
// GetCurrentPidMemoryUsage get current Memory usage
func GetCurrentPidMemoryUsage() float64 {
currentPid := os.Getpid()
p, err := process.NewProcess(int32(currentPid))
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
percent, err := p.MemoryPercent()
if err != nil {
log.Error().Err(err).Msg(fmt.Sprintf("failed to get CPU percent\n"))
return 0.0
}
return float64(percent)
}