Averages are calculated correctly, PCP is able to determine a victim to be capped

pcp/test/power.go

@@ -0,0 +1,190 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+	"time"
+	"strconv"
+	"math"
+	"container/ring"
+	"sort"
+)
+
+type Victim struct {
+	Watts float64
+	Host string
+}
+
+type VictimSorter []Victim
+
+func (slice VictimSorter) Len() int {
+	return len(slice)
+}
+
+func (slice VictimSorter) Less(i, j int) bool {
+	return slice[i].Watts >= slice[j].Watts
+}
+
+func (slice VictimSorter) Swap(i, j int) {
+	slice[i], slice[j] = slice[j], slice[i]
+}
+
+var RAPLUnits = math.Pow(2, -32)
+
+func mean(values *ring.Ring) float64 {
+
+	total := 0.0
+	count := 0.0
+
+	values.Do(func(x interface{}){
+		if val, ok := x.(float64); ok { //Add it if we can get a float
+			total += val
+			count++
+		}
+	})
+
+	if count == 0.0 {
+		return 0.0
+	}
+
+
+	count /= 2
+
+	return (total/count)
+}
+
+//func median(values *ring.Ring) {
+
+//}
+
+
+func main() {
+
+	prefix := "test"
+	logging := new(bool)
+	*logging = true
+	const pcpCommand string = "pmdumptext -m -l -f '' -t 1.0 -d , -c config"
+	cmd := exec.Command("sh", "-c", pcpCommand)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+	startTime := time.Now().Format("20060102150405")
+
+	logFile, err := os.Create("./" + prefix + startTime + ".pcplog")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	defer logFile.Close()
+
+	pipe, err := cmd.StdoutPipe()
+	if err != nil {
+		log.Fatal(err)
+	}
+	//cmd.Stdout = stdout
+
+	scanner := bufio.NewScanner(pipe)
+
+	go func(logging *bool) {
+		// Get names of the columns
+		scanner.Scan()
+
+		// Write to logfile
+		logFile.WriteString(scanner.Text() + "\n")
+
+		headers := strings.Split(scanner.Text(), ",")
+
+		powerIndexes := make([]int, 0, 0)
+		powerAverage := make(map[string]*ring.Ring)
+		indexToHost := make(map[int]string)
+
+		for i, hostMetric := range headers {
+			split := strings.Split(hostMetric, ":")
+			fmt.Printf("%d Host %s: Metric: %s\n", i, split[0], split[1])
+
+			if strings.Contains(split[1], "RAPL_ENERGY_PKG") {
+				fmt.Println("Index: ", i)
+				powerIndexes = append(powerIndexes, i)
+				indexToHost[i] = split[0]
+				powerAverage[split[0]] = ring.New(10) // Two PKS per node, 10 = 5 seconds tracking
+			}
+		}
+
+		// Throw away first set of results
+		scanner.Scan()
+
+		seconds := 0
+		for scanner.Scan() {
+
+			if *logging {
+				log.Println("Logging PCP...")
+				split := strings.Split(scanner.Text(), ",")
+				logFile.WriteString(scanner.Text() + "\n")
+
+
+				totalPower := 0.0
+				for _,powerIndex := range powerIndexes {
+					power, _ := strconv.ParseFloat(split[powerIndex], 64)
+
+					host := indexToHost[powerIndex]
+
+					powerAverage[host].Value = power
+					powerAverage[host] = powerAverage[host].Next()
+
+					log.Printf("Host: %s, Index: %d, Power: %f", indexToHost[powerIndex], powerIndex, (power * RAPLUnits))
+
+					totalPower += power
+				}
+
+				log.Println("Total power: ", totalPower * RAPLUnits)
+
+				victims := make([]Victim, 8, 8)
+
+				// TODO: Just keep track of the largest to reduce fron nlogn to n
+				for name,ring := range powerAverage {
+					victims = append(victims, Victim{mean(ring), name})
+					//log.Printf("host: %s, Avg: %f", name, mean(ring) * RAPLUnits)
+				}
+				sort.Sort(VictimSorter(victims))
+				log.Printf("Current Victim %s Avg. Wattage: %f", victims[0].Host, victims[0].Watts * RAPLUnits)
+			}
+
+			/*
+				fmt.Printf("Second: %d\n", seconds)
+				for i, val := range strings.Split(scanner.Text(), ",") {
+					fmt.Printf("host metric: %s val: %s\n", headers[i], val)
+				}*/
+
+			seconds++
+
+			// fmt.Println("--------------------------------")
+		}
+	}(logging)
+
+	log.Println("PCP logging started")
+
+	if err := cmd.Start(); err != nil {
+		log.Fatal(err)
+	}
+
+	if err := cmd.Wait(); err != nil {
+		log.Fatal(err)
+	}
+
+	/*
+		pgid, err := syscall.Getpgid(cmd.Process.Pid)
+
+		select {
+		case <-quit:
+			log.Println("Stopping PCP logging in 5 seconds")
+			time.Sleep(5 * time.Second)
+
+		// http://stackoverflow.com/questions/22470193/why-wont-go-kill-a-child-process-correctly
+		// kill process and all children processes
+			syscall.Kill(-pgid, 15)
+			return
+		}*/
+}

pcp/test/victim.go

@@ -0,0 +1,3 @@
+package main
+
+