Add dynamic extra iterations to ensure average of a steady state

Author: farquet

mx.graalpython/mx_graalpython_benchmark.py

@@ -375,9 +375,9 @@ def rules(self, output, benchmarks, bm_suite_args):
         ]
 
     def runAndReturnStdOut(self, benchmarks, bmSuiteArgs):
-        # host-vm rewrite rules
         ret_code, out, dims = super(PythonBenchmarkSuite, self).runAndReturnStdOut(benchmarks, bmSuiteArgs)
 
+        # host-vm rewrite rules
         def _replace_host_vm(key):
             host_vm = dims.get("host-vm")
             if host_vm and host_vm.startswith(key):
@@ -450,10 +450,20 @@ def createVmCommandLineArgs(self, benchmarks, bmSuiteArgs):
 
         if "-i" not in run_args:
             run_args += self._benchmarks[benchmark]
+            num_iterations = self.defaultIterations(benchmark) + self.getExtraIterationCount(self.defaultIterations(benchmark))
+            run_args[run_args.index("-i") + 1] = str(num_iterations)
         vm_options, run_args = self.postprocess_run_args(run_args)
         cmd_args.extend(run_args)
         return vm_options + vm_args + cmd_args
 
+    def defaultIterations(self, bm):
+        default_bench_args = self._benchmarks[bm]
+        if "-i" in default_bench_args:
+            bench_idx = default_bench_args.index("-i")
+            if bench_idx + 1 < len(default_bench_args):
+                return int(default_bench_args[bench_idx + 1])
+        return DEFAULT_ITERATIONS
+
     def benchmarkList(self, bm_suite_args):
         return list(self._benchmarks.keys())