yuruguo commented on a change in pull request #12020:
URL: https://github.com/apache/pulsar/pull/12020#discussion_r720937128



##########
File path: 
pulsar-testclient/src/main/java/org/apache/pulsar/proxy/socket/client/PerformanceClient.java
##########
@@ -244,10 +242,19 @@ public void runPerformanceTest(long messages, long limit, 
int numOfTopic, int si
         executor.submit(() -> {
             try {
                 RateLimiter rateLimiter = RateLimiter.create(limit);
+                long startTime = System.nanoTime();
+                long testEndTime = startTime + (long) (testTime * 1e9);
                 // Send messages on all topics/producers
                 long totalSent = 0;
                 while (true) {
                     for (String topic : producersMap.keySet()) {
+                        if (testTime > 0 && System.nanoTime() > testEndTime) {
+                            log.info("------------- DONE (reached the maximum 
duration: [{} seconds] of production) --------------", testTime);

Review comment:
       Can you help me look at it again? If my understanding is wrong, please 
explain to me and I will complete this pr as soon as possible, thx!




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