Some more heap/gc tuning

scripts/send-fake-data.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"math"
+	"math/rand"
+	"net/http"
+	"time"
+)
+
+const token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJFZERTQSJ9.eyJ1c2VyIjoiYWRtaW4iLCJyb2xlcyI6WyJST0xFX0FETUlOIiwiUk9MRV9BTkFMWVNUIiwiUk9MRV9VU0VSIl19.d-3_3FZTsadPjDEdsWrrQ7nS0edMAR4zjl-eK7rJU3HziNBfI9PDHDIpJVHTNN5E5SlLGLFXctWyKAkwhXL-Dw"
+const ccmsurl = "http://localhost:8081/api/write"
+const cluster = "fakedev"
+const sockets = 2
+const cpus = 8
+const freq = 15 * time.Second
+
+var hosts = []string{"fake001", "fake002", "fake003", "fake004", "fake005"}
+var metrics = []struct {
+	Name     string
+	Type     string
+	AvgValue float64
+}{
+	{"flops_any", "cpu", 10.0},
+	{"mem_bw", "socket", 50.0},
+	{"ipc", "cpu", 1.25},
+	{"cpu_load", "node", 4},
+	{"mem_used", "node", 20},
+}
+
+var states = make([]float64, 0)
+
+func send(client *http.Client, t int64) {
+	msg := &bytes.Buffer{}
+
+	i := 0
+	for _, host := range hosts {
+		for _, metric := range metrics {
+			n := 1
+			if metric.Type == "socket" {
+				n = sockets
+			} else if metric.Type == "cpu" {
+				n = cpus
+			}
+
+			for j := 0; j < n; j++ {
+				fmt.Fprintf(msg, "%s,cluster=%s,host=%s,type=%s", metric.Name, cluster, host, metric.Type)
+				if metric.Type == "socket" {
+					fmt.Fprintf(msg, ",type-id=%d", j)
+				} else if metric.Type == "cpu" {
+					fmt.Fprintf(msg, ",type-id=%d", j)
+				}
+
+				x := metric.AvgValue + math.Sin(states[i])*(metric.AvgValue/10.)
+				states[i] += 0.1
+				fmt.Fprintf(msg, " value=%f ", x)
+
+				fmt.Fprintf(msg, "%d\n", t)
+				i++
+			}
+		}
+	}
+
+	req, _ := http.NewRequest(http.MethodPost, ccmsurl, msg)
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+	res, err := client.Do(req)
+	if err != nil {
+		log.Print(err)
+		return
+	}
+	if res.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(res.Body)
+		log.Printf("%s: %s", res.Status, string(body))
+	}
+}
+
+func main() {
+	for range hosts {
+		for _, m := range metrics {
+			n := 1
+			if m.Type == "socket" {
+				n = sockets
+			} else if m.Type == "cpu" {
+				n = cpus
+			}
+
+			for i := 0; i < n; i++ {
+				states = append(states, rand.Float64()*100)
+			}
+		}
+	}
+
+	client := &http.Client{}
+
+	i := 0
+	for t := range time.Tick(freq) {
+		log.Printf("tick... (#%d)", i)
+		i++
+
+		send(client, t.Unix())
+	}
+}