src/jdk.jcmd/share/classes/sun/tools/jmap/JMap.java

*** 174,184 ****
      private static void histo(String pid, String options)
          throws AttachNotSupportedException, IOException,
                 UnsupportedEncodingException {
          String liveopt = "-all";
          String filename = null;
!         String parallelthreadnum = null;
          String subopts[] = options.split(",");
          boolean set_all = false;
          boolean set_live = false;
          String cmdline = "";
  
--- 174,184 ----
      private static void histo(String pid, String options)
          throws AttachNotSupportedException, IOException,
                 UnsupportedEncodingException {
          String liveopt = "-all";
          String filename = null;
!         String parallel = null;
          String subopts[] = options.split(",");
          boolean set_all = false;
          boolean set_live = false;
          String cmdline = "";
  
*** 195,207 ****
                  filename = parseFileName(subopt);
                  if (filename == null) {
                      usage(1); // invalid options or no filename
                  }
                  cmdline = add_option(cmdline, filename);
!             } else if (subopt.startsWith("parallelThreadNum=")) {
!                parallelthreadnum = subopt.substring(19);
!                if (parallelthreadnum == null) {
                      usage(1);
                 }
                 // Add "parallelThreadsNum=<>" for later check
                 cmdline = add_option(cmdline, subopt);
              } else {
--- 195,207 ----
                  filename = parseFileName(subopt);
                  if (filename == null) {
                      usage(1); // invalid options or no filename
                  }
                  cmdline = add_option(cmdline, filename);
!             } else if (subopt.startsWith("parallel=")) {
!                parallel = subopt.substring("parallel=".length());
!                if (parallel == null) {
                      usage(1);
                 }
                 // Add "parallelThreadsNum=<>" for later check
                 cmdline = add_option(cmdline, subopt);
              } else {
*** 309,322 ****
          System.err.println("");
          System.err.println("    histo-options:");
          System.err.println("      live         count only live objects");
          System.err.println("      all          count all objects in the heap (default if one of \"live\" or \"all\" is not specified)");
          System.err.println("      file=<file>  dump data to <file>");
!         System.err.println("      parallelThreadNum=<number>  parallel threads number for heap iteration:");
!         System.err.println("                                  parallelThreadNum=0 default behavior, use predefined number of threads");
!         System.err.println("                                  parallelThreadNum=1 disable parallel heap iteration");
!         System.err.println("                                  parallelThreadNum=<N> use N threads for parallel heap iteration");
          System.err.println("");
          System.err.println("    Example: jmap -histo:live,file=/tmp/histo.data <pid>");
          System.exit(exit);
      }
  }
--- 309,322 ----
          System.err.println("");
          System.err.println("    histo-options:");
          System.err.println("      live         count only live objects");
          System.err.println("      all          count all objects in the heap (default if one of \"live\" or \"all\" is not specified)");
          System.err.println("      file=<file>  dump data to <file>");
!         System.err.println("      parallel=<number>  parallel threads number for heap iteration:");
!         System.err.println("                                  parallel=0 default behavior, use predefined number of threads");
!         System.err.println("                                  parallel=1 disable parallel heap iteration");
!         System.err.println("                                  parallel=<N> use N threads for parallel heap iteration");
          System.err.println("");
          System.err.println("    Example: jmap -histo:live,file=/tmp/histo.data <pid>");
          System.exit(exit);
      }
  }