시스템 사용율 모니터링 기능 테스트

src/main/java/com/kamco/cd/training/common/service/GpuDmonReader.java

@@ -76,7 +76,8 @@ public class GpuDmonReader {
 
       try {
         Thread.sleep(5000); // 5초 후에 시작
-      } catch (InterruptedException ignored) {}
+      } catch (InterruptedException ignored) {
+      }
     }
   }
 
@@ -86,16 +87,12 @@ public class GpuDmonReader {
   private void runDmon() throws Exception {
 
     // GPU utilization만 출력 (-s u)
-    ProcessBuilder pb = new ProcessBuilder(
+    ProcessBuilder pb = new ProcessBuilder("nvidia-smi", "dmon", "-s", "u");
-      "nvidia-smi", "dmon", "-s", "u"
-    );
 
     process = pb.start();
 
     // dmon은 stdout으로 계속 데이터를 뿌림 (스트리밍)
-    try (BufferedReader br = new BufferedReader(
+    try (BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
-      new InputStreamReader(process.getInputStream()))
-    ) {
       String line;
 
       while ((line = br.readLine()) != null) {
@@ -144,7 +141,8 @@ public class GpuDmonReader {
       if (process != null && process.isAlive()) {
         process.destroy();
       }
-    } catch (Exception ignored) {}
+    } catch (Exception ignored) {
+    }
   }
 
   private boolean isNvidiaAvailable() {

src/main/java/com/kamco/cd/training/common/service/SystemMonitorService.java

@@ -68,9 +68,7 @@ public class SystemMonitorService {
         int index = entry.getKey();
         int util = entry.getValue();
 
-        gpuHistory
+        gpuHistory.computeIfAbsent(index, k -> new ArrayDeque<>()).add(util);
-          .computeIfAbsent(index, k -> new ArrayDeque<>())
-          .add(util);
 
         Deque<Integer> q = gpuHistory.get(index);
         if (q.size() > 30) q.poll();
@@ -185,10 +183,7 @@ public class SystemMonitorService {
     // =====================
     // CPU 평균 (30초)
     // =====================
-    dto.cpu = (int) cpuHistory.stream()
+    dto.cpu = (int) cpuHistory.stream().mapToDouble(Double::doubleValue).average().orElse(0);
-      .mapToDouble(Double::doubleValue)
-      .average()
-      .orElse(0);
 
     // =====================
     // Memory (현재값)
@@ -204,9 +199,7 @@ public class SystemMonitorService {
 
       Deque<Integer> q = gpuHistory.get(index);
 
-      int avg = (int) (q == null ? 0 :
+      int avg = (int) (q == null ? 0 : q.stream().mapToInt(i -> i).average().orElse(0));
-        q.stream().mapToInt(i -> i).average().orElse(0)
-      );
 
       dto.gpus.add(new MonitorDto.Gpu(index, avg));
     }