add p2c peak ewma load balancer

example/rpc/client/unary/client.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"log"
 	"time"
 
 	"zero/core/conf"
@@ -25,11 +24,7 @@ func main() {
 	for {
 		select {
 		case <-ticker.C:
-			conn, ok := client.Next()
-			if !ok {
-				log.Fatal("no server")
-			}
-
+			conn := client.Conn()
 			greet := unary.NewGreeterClient(conn)
 			resp, err := greet.Greet(context.Background(), &unary.Request{
 				Name: "kevin",