Add heap max ratio and force trigger

java-oom/src/main/java/com/kwai/koom/javaoom/common/KConfig.java

@@ -1,10 +1,10 @@
 package com.kwai.koom.javaoom.common;
 
-import static com.kwai.koom.javaoom.common.KGlobalConfig.KOOM_DIR;
+import com.kwai.koom.javaoom.monitor.HeapThreshold;
 
 import java.io.File;
 
-import com.kwai.koom.javaoom.monitor.HeapThreshold;
+import static com.kwai.koom.javaoom.common.KGlobalConfig.KOOM_DIR;
 
 /**
  * Copyright 2020 Kwai, Inc. All rights reserved.
@@ -59,6 +59,7 @@ public static KConfig defaultConfig() {
   public static class KConfigBuilder {
 
     private float heapRatio;
+    private float heapMaxRatio;
     private int heapOverTimes;
     private int heapPollInterval;
 
@@ -68,6 +69,7 @@ public static class KConfigBuilder {
 
     public KConfigBuilder() {
       this.heapRatio = KConstants.HeapThreshold.getDefaultPercentRation();
+      this.heapMaxRatio = KConstants.HeapThreshold.getDefaultMaxPercentRation();
       this.heapOverTimes = KConstants.HeapThreshold.OVER_TIMES;
       this.heapPollInterval = KConstants.HeapThreshold.POLL_INTERVAL;
       File cacheFile = KGlobalConfig.getApplication().getCacheDir();
@@ -85,6 +87,11 @@ public KConfigBuilder heapRatio(float heapRatio) {
       return this;
     }
 
+    public KConfigBuilder heapMaxRatio(float heapMaxRatio) {
+      this.heapMaxRatio = heapMaxRatio;
+      return this;
+    }
+
     public KConfigBuilder heapOverTimes(int heapOverTimes) {
       this.heapOverTimes = heapOverTimes;
       return this;
@@ -101,8 +108,11 @@ public KConfigBuilder processName(String name) {
     }
 
     public KConfig build() {
+      if (heapRatio > heapMaxRatio) {
+        throw new RuntimeException("heapMaxRatio be greater than heapRatio");
+      }
       HeapThreshold heapThreshold = new HeapThreshold(heapRatio,
-          heapOverTimes, heapPollInterval);
+              heapMaxRatio, heapOverTimes, heapPollInterval);
       return new KConfig(heapThreshold, this.rootDir, this.processName);
     }
   }

java-oom/src/main/java/com/kwai/koom/javaoom/common/KConstants.java

@@ -2,8 +2,6 @@
 
 import static com.kwai.koom.javaoom.common.KConstants.Bytes.MB;
 
-import android.util.Log;
-
 /**
  * Copyright 2020 Kwai, Inc. All rights reserved.
  * <p>
@@ -38,6 +36,8 @@ public static class HeapThreshold {
     public static float PERCENT_RATIO_IN_256_DEVICE = 85;
     public static float PERCENT_RATIO_IN_128_DEVICE = 90;
 
+    public static float PERCENT_MAX_RATIO = 95;
+
     public static float getDefaultPercentRation() {
       int maxMem = (int) (Runtime.getRuntime().maxMemory() / MB);
       if (Debug.VERBOSE_LOG) {
@@ -53,6 +53,10 @@ public static float getDefaultPercentRation() {
       return KConstants.HeapThreshold.PERCENT_RATIO_IN_512_DEVICE;
     }
 
+    public static float getDefaultMaxPercentRation() {
+      return KConstants.HeapThreshold.PERCENT_MAX_RATIO;
+    }
+
     public static int OVER_TIMES = 3;
     public static int POLL_INTERVAL = 5000;
   }

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/FdThreshold.java

@@ -28,6 +28,11 @@ public float value() {
     return DEFAULT_FD_COUNT;
   }
 
+  @Override
+  public float maxValue() {
+    return 0;
+  }
+
   @Override
   public int overTimes() {
     return DEFAULT_OVER_TIMES;

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/HeapMonitor.java

@@ -1,7 +1,5 @@
 package com.kwai.koom.javaoom.monitor;
 
-import android.util.Log;
-
 import com.kwai.koom.javaoom.common.KConstants;
 import com.kwai.koom.javaoom.common.KGlobalConfig;
 import com.kwai.koom.javaoom.common.KLog;
@@ -57,12 +55,19 @@ public boolean isTrigger() {
 
     HeapStatus heapStatus = currentHeapStatus();
 
+    if (heapStatus.isOverMaxThreshold) {
+      // 已达到最大阀值，强制触发trigger，防止后续出现大内存分配导致OOM进程Crash，无法触发trigger
+      KLog.i(TAG, "heap used is over max ratio, force trigger and over times reset to 0");
+      currentTimes = 0;
+      return true;
+    }
+
     if (heapStatus.isOverThreshold) {
       KLog.i(TAG, "heap status used:" + heapStatus.used / KConstants.Bytes.MB
-          + ", max:" + heapStatus.max / KConstants.Bytes.MB
-          + ", last over times:" + currentTimes);
+              + ", max:" + heapStatus.max / KConstants.Bytes.MB
+              + ", last over times:" + currentTimes);
       if (heapThreshold.ascending()) {
-        if (lastHeapStatus == null || heapStatus.used >= lastHeapStatus.used) {
+        if (lastHeapStatus == null || heapStatus.used >= lastHeapStatus.used || heapStatus.isOverMaxThreshold) {
           currentTimes++;
         } else {
           KLog.i(TAG, "heap status used is not ascending, and over times reset to 0");
@@ -76,7 +81,7 @@ public boolean isTrigger() {
     }
 
     lastHeapStatus = heapStatus;
-    return currentTimes >= heapThreshold.overTimes();
+    return currentTimes >= heapThreshold.overTimes() || heapStatus.isOverMaxThreshold;
   }
 
   private HeapStatus lastHeapStatus;
@@ -86,14 +91,17 @@ private HeapStatus currentHeapStatus() {
     heapStatus.max = Runtime.getRuntime().maxMemory();
     heapStatus.used = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
     KLog.i(TAG, 100.0f * heapStatus.used / heapStatus.max + " " + heapThreshold.value());
-    heapStatus.isOverThreshold = 100.0f * heapStatus.used / heapStatus.max > heapThreshold.value();
+    float heapInPercent = 100.0f * heapStatus.used / heapStatus.max;
+    heapStatus.isOverThreshold = heapInPercent > heapThreshold.value();
+    heapStatus.isOverMaxThreshold = heapInPercent > heapThreshold.maxValue();
     return heapStatus;
   }
 
   static class HeapStatus {
     long max;
     long used;
     boolean isOverThreshold;
+    boolean isOverMaxThreshold;
   }
 
   @Override

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/HeapThrashingThreshold.java

@@ -30,6 +30,11 @@ public float value() {
     return DEFAULT_THRASH_SIZE * KConstants.Bytes.MB;
   }
 
+  @Override
+  public float maxValue() {
+    return 0;
+  }
+
   @Override
   public int overTimes() {
     return DEFAULT_OVER_TIMES;

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/HeapThreshold.java

@@ -20,11 +20,13 @@
 public class HeapThreshold implements Threshold {
 
   private float heapRatioInPercent;
+  private float heapMaxRatioInPercent;
   private int overTimes;
   private int pollInterval;
 
-  public HeapThreshold(float heapRatioInPercent, int overTimes, int pollInterval) {
+  public HeapThreshold(float heapRatioInPercent, float heapMaxRatioInPercent, int overTimes, int pollInterval) {
     this.heapRatioInPercent = heapRatioInPercent;
+    this.heapMaxRatioInPercent = heapMaxRatioInPercent;
     this.overTimes = overTimes;
     this.pollInterval = pollInterval;
   }
@@ -34,6 +36,11 @@ public float value() {
     return heapRatioInPercent;
   }
 
+  @Override
+  public float maxValue() {
+    return heapMaxRatioInPercent;
+  }
+
   @Override
   public int overTimes() {
     return overTimes;

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/ThreadThreshold.java

@@ -28,6 +28,11 @@ public float value() {
     return DEFAULT_THREAD_COUNT;
   }
 
+  @Override
+  public float maxValue() {
+    return 0;
+  }
+
   @Override
   public int overTimes() {
     return DEFAULT_OVER_TIMES;

java-oom/src/main/java/com/kwai/koom/javaoom/monitor/Threshold.java

@@ -20,10 +20,15 @@
 public interface Threshold {
 
   /**
-   * @return value
+   * @return value 触发trigger的最低阀值，且必须命中策略heapOverTimes次才会真正触发
    */
   float value();
 
+  /**
+   * @return maxValue 达到这个最大阀值，强制触发trigger
+   */
+  float maxValue();
+
   /**
    * @return threshold crossed times
    */