RPC的TPS的計算

    RPC裏面如何計算TPS，如果讓你來計算這個TPS，你會怎麼去實現呢？

    這是個有意思的問題，恰好這幾天看SOFA-RPC的example，看到了裏面是如果計算TPS的，這裏分享下。

    如下List-1中是調用方的代碼

• 創建線程池，線程池的大小可按機器配置情況設置
• 每個線程循環發送請求，然後將AtomicLong加1
• 之後另一個線程，每隔1s，獲取當前AtomicLong的值，然後減去上次AtomicLong的值，這樣就是1s內請求的數量，即TPS

    List-1

final int threads = 50;
final AtomicLong cnt = new AtomicLong(0);
final ThreadPoolExecutor service1 = new ThreadPoolExecutor(threads, threads, 0L, TimeUnit.MILLISECONDS,
    new SynchronousQueue<Runnable>());// 無隊列
for (int i = 0; i < threads; i++) {
    service1.execute(new Runnable() {
        @Override
        public void run() {
            int n = 0;
            while (true) {
                try {
                    //echoService.echoStr("1234567890");
                    // 1k
                    //echoService.echoStr("..省略，1k個字符");
                    // 5k
                    LOGGER.info("send msg");
                    echoService.echoStr("..省略，5k個字符");
                    cnt.incrementAndGet();
                } catch (Exception e) {
                    LOGGER.error("", e);
                }
            }
        }
    });
}

Thread thread = new Thread(new Runnable() {
    private long last = 0;

    @Override
    public void run() {
        while (true) {
            long count = cnt.get();
            long tps = count - last;
            LOGGER.error("last 1s invoke: {}, queue: {}", tps, service1.getQueue().size());
            last = count;

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
            }
        }
    }
}, "Print-tps-THREAD");
thread.start();

    參考：SOFA-RPC的com.alipay.sofa.rpc.bolt.start.BoltClientMultipleMain