test/hotspot/jtreg/gc/shenandoah/TestEvilSyncBug.java

rev 57639 : 8237038: Shenandoah: Reduce thread pool size in TestEvilSyncBug.java test

*** 1,7 ****
  /*
!  * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
--- 1,7 ----
  /*
!  * Copyright (c) 2016, 2020, Red Hat, Inc. All rights reserved.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
*** 47,58 ****
  
      public static void main(String[] args) throws Exception {
          if (args.length > 0) {
              test();
          } else {
!             ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
! 
              Future<?>[] fs = new Future<?>[NUM_RUNS];
  
              for (int c = 0; c < NUM_RUNS; c++) {
                  Callable<Void> task = () -> {
                      ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xms128m",
--- 47,60 ----
  
      public static void main(String[] args) throws Exception {
          if (args.length > 0) {
              test();
          } else {
!             // Use 1/4 of available processors to avoid over provisioning thread pool on many core
!             // systems.
!             int numProcessors = Runtime.getRuntime().availableProcessors();
!             ExecutorService pool = Executors.newFixedThreadPool(Math.max(1, numProcessors / 4));
              Future<?>[] fs = new Future<?>[NUM_RUNS];
  
              for (int c = 0; c < NUM_RUNS; c++) {
                  Callable<Void> task = () -> {
                      ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xms128m",