Make cache dropping optional (--drop-caches flag)

1 files changed, 7 insertions, 2 deletions

diff --git a/src/main/java/bench/Main.java b/src/main/java/bench/Main.java
index 0ce0f3c..a12c22b 100644
--- a/src/main/java/bench/Main.java
+++ b/src/main/java/bench/Main.java
@@ -42,6 +42,9 @@ public class Main implements Callable<Integer> {
     @Option(names = {"--flush"}, description = "Call LogManager.shutdown() to flush at end of each test (default: false)")
     private boolean flush = false;
 
+    @Option(names = {"--drop-caches"}, description = "Drop OS file caches before each test (requires sudo, default: false)")
+    private boolean dropCaches = false;
+
     public static void main(String[] args) {
         // Must set context selector before ANY Log4j initialization
         // We'll set it dynamically per-config in BenchRunner instead
@@ -88,8 +91,10 @@ public class Main implements Callable<Integer> {
         for (String configName : config.getConfigs()) {
             System.out.printf("Running: %s ...%n", configName);
             try {
-                // Drop caches before each test
-                dropCaches();
+                // Drop caches before each test if requested
+                if (dropCaches) {
+                    dropCaches();
+                }
 
                 // Build command with appropriate system properties
                 List<String> cmd = new ArrayList<>();