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The Disruptor
 High Performance Inter-Thread Messaging
 Michael Barker @mikeb2701
 Lead Developer
 LMAX


Thursday, 17 November 11
Mo’vember
   • Apologies for the silly facial hair
   • Raising money for men’s health
   • Donate!!!



                    http://mobro.co/mikeb2701



                                                2

Thursday, 17 November 11
What is the
                                         Disruptor?
                           http://code.google.com/p/disruptor

Thursday, 17 November 11
static long foo = 0;

                private static void increment() {
                    for (long l = 0; l < 500000000L; l++) {
                        foo++;
                    }
                }




Thursday, 17 November 11
public static long foo = 0;
                  public static Lock lock = new Lock();

                  private static void increment() {
                      int iterations = 500000000L / THREADS;
                      for (long l = 0; l < iterations; l++){
                          lock.lock();
                          try {
                              foo++;
                          } finally {
                              lock.unlock();
                          }
                      }
                  }


Thursday, 17 November 11
static AtomicLong foo = new AtomicLong(0);

           private static void increment() {
               int iterations = 500000000L / THREADS;
               for (long l = 0; l < iterations; l++) {
                   foo.getAndIncrement();
               }
           }




Thursday, 17 November 11

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Disruptor tools in action

  • 1. The Disruptor High Performance Inter-Thread Messaging Michael Barker @mikeb2701 Lead Developer LMAX Thursday, 17 November 11
  • 2. Mo’vember • Apologies for the silly facial hair • Raising money for men’s health • Donate!!! http://mobro.co/mikeb2701 2 Thursday, 17 November 11
  • 3. What is the Disruptor? http://code.google.com/p/disruptor Thursday, 17 November 11
  • 4. static long foo = 0; private static void increment() { for (long l = 0; l < 500000000L; l++) { foo++; } } Thursday, 17 November 11
  • 5. public static long foo = 0; public static Lock lock = new Lock(); private static void increment() { int iterations = 500000000L / THREADS; for (long l = 0; l < iterations; l++){ lock.lock(); try { foo++; } finally { lock.unlock(); } } } Thursday, 17 November 11
  • 6. static AtomicLong foo = new AtomicLong(0); private static void increment() { int iterations = 500000000L / THREADS; for (long l = 0; l < iterations; l++) { foo.getAndIncrement(); } } Thursday, 17 November 11
  • 7. Increment a counter 500 000 000 times. • One Thread : 300 ms Thursday, 17 November 11
  • 8. Increment a counter 500 000 000 times. • One Thread : 300 ms • One Thread (volatile): 4 700 ms (15x) Thursday, 17 November 11
  • 9. Increment a counter 500 000 000 times. • One Thread : 300 ms • One Thread (volatile): 4 700 ms (15x) • One Thread (Atomic) : 5 700 ms (19x) Thursday, 17 November 11
  • 10. Increment a counter 500 000 000 times. • One Thread : 300 ms • One Thread (volatile): 4 700 ms (15x) • One Thread (Atomic) : 5 700 ms (19x) • One Thread (Lock) : 10 000 ms (33x) Thursday, 17 November 11
  • 11. Increment a counter 500 000 000 times. • One Thread : 300 ms • One Thread (volatile): 4 700 ms (15x) • One Thread (Atomic) : 5 700 ms (19x) • One Thread (Lock) : 10 000 ms (33x) • Two Threads (Atomic) : 17 000 ms (58x) Thursday, 17 November 11
  • 12. Increment a counter 500 000 000 times. • One Thread : 300 ms • One Thread (volatile): 4 700 ms (15x) • One Thread (Atomic) : 5 700 ms (19x) • One Thread (Lock) : 10 000 ms (33x) • Two Threads (Atomic) : 17 000 ms (58x) • Two Threads (Lock) : 104 000 ms (345x) ^^^^^^^^ > 1.5 minutes!!! Thursday, 17 November 11
  • 14. Test Queue Disruptor Factor OnePublisherToOneProcessorUniCastThroughputTest 2,366,171 72,087,993 30.5 OnePublisherToThreeProcessorDiamondThroughputTest 1,590,126 63,358,798 39.8 OnePublisherToThreeProcessorMultiCastThroughputTest 191,661 54,165,692 282.6 OnePublisherToThreeProcessorPipelineThroughputTest 1,289,199 71,562,125 55.5 OnePublisherToThreeWorkerPoolThroughputTest 2,175,593 10,412,567 4.8 Thursday, 17 November 11
  • 15. Demo: Concert Tickets... <event> <event> Concert Concert Ticket Repository Created Purchase Concert <entity> Service Concert <event> <event> <event> <event> <entity> Concert Allocation Allocation Section Section Created Rejected Approved Updated 15 Thursday, 17 November 11
  • 16. Demo: Concert Tickets... Concert Service UDP UDP Request Response Servlet Servlet HTTP Long Poll HTTP Client 16 Thursday, 17 November 11