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