1 Turn on the benchmark counters, and listen for specific patterns on System.out/System.err.
   2 The format of this option is:
   3 
   4   (err|out),start pattern,end pattern
   5   
   6 You can use "~" to match 1 or more digits.
   7 Examples:
   8 
   9   err, starting =====, PASSED in
  10   out,Iteration ~ (~s) begins:,Iteration ~ (~s) ends:
  11   
  12 The first pattern matches DaCapo output and the second matches SPECjvm2008 output.
  13 
  14 As a more detailed example, here are the options to use for getting statistics
  15 about allocations within the DaCapo pmd benchmark:
  16 
  17   -XX:JVMCICounterSize=<value> -XX:-JVMCICountersExcludeCompiler \
  18   -Dgraal.BenchmarkDynamicCounters="err, starting ====, PASSED in " \
  19   -Dgraal.ProfileAllocations=true
  20   
  21 The JVMCICounterSize value depends on the granularity of the profiling -
  22 10000 should be sufficient. Omit JVMCICountersExcludeCompiler to exclude
  23 counting allocations on the compiler threads.
  24 The counters can be further configured by the ProfileAllocationsContext option.